Vmat vs tomotherapy

Vmat vs tomotherapy. The Pinnacle treatment planning system (TPS, V9. 66 minutes, p < 0. Mayo CS Objectives: To compare treatment plans for helical tomotherapy (TOMO), volumetric modulated arc therapy (VMAT) and intensity-modulated radiotherapy (IMRT) for locally advanced rectal cancer (LARC). 05); those of the Ethos, HyperArc and VMAT techniques were similar (p < 0. 20 However, Quan et al. 5%, P < 0. 465: 0. 11. 1e0. 87 vs 0. Sixty patients were included in this study. Materials and methods: This retrospective study from December 2010 to June 2013 included 20 patients with LARC who received neoadjuvant concurrent 1. How it works. SmartArc delivered lower maximum dose for majority of NT, but higher mean dose. 1016/j. 19 ± 0. 1 Department of Radiotherapy, Yunnan Cancer Hospital, the Third Affiliated Hospital of Kunming Medical University, Kunming, China; 2 Cancer Hospital Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, China; Introduction: Although intensity-modulated radiotherapy (IMRT), volumetric-modulated arc Volumetric modulated arc therapy (VMAT) is a novel form of IMRT, which can deliver more accurate dose distribution and shorten treatment time. Learn how IMRT works, how it is planned and delivered, We performed a comprehensive comparative study of the plan quality between volumetric modulated arc therapy (VMAT) and intensity-modulated radiation therapy (IMRT) The V2. Methods: Dual-arc VMAT and HT treatment plans were created for fifteen Volumetric Modulated Arc Therapy Enabled Total Body Irradiation (VMAT-TBI): Six-year Clinical Experience and Treatment Outcomes. 85 Therefore, we conducted this case series analysis to compare the dosimetric differences among helical tomotherapy (TOMO), volumetric modulated arc therapy (VMAT), and intensity-modulated radiotherapy (IMRT) for grade II gliomas. 3 years) of the pre-study (up to 77 Gy) were used for comparison of IMRT, VMAT, and helical tomotherapy (HT). All of these techniques allow the delivery of higher radiation doses to the target volume, at the same time reducing the risk Fig. Göksel et al. serial tomotherapy, step-and-shoot IMRT and 3D-conformal RT for treatment of prostate cancer, published in Radiotherapy and Oncology 93 on 2009-09-16 by Dirk Wolff+10. 99 ± 1. This may be explained by the overestimation of the calculated dose in the first mm close to the skin by the Tomotherapy ® TPS. Zhang et al. By contrast, no significant differences VMAT is an arc treatment that creates highly conformal dose distribution with avoidance of critical structures along with faster delivery time and lowers MU's when compared to IMRT. VMAT CSI has been shown to have signi ficant dosimetric advantages compared to 3DCRT in terms of dose heteroge- neity, robustness to Tomotherapy At our institution, we currently utilize Tomotherapy for IGRT, which obtains a daily reference CT scan – which the treatment team examines to see if the treatment needs to be adjusted or the treatment fields need to be shifted on a daily basis. Tomotherapy excelled in sparing the hippocampus, while VMAT showed promise in sparing OARs. 30 minutes (p < 0. Volumetric intensity modulated arc therapy (VMAT) vs. 6 There also exists a wide variety of planning techniques, objectives, and vari-ability within each speci fic category of CSI planning type. Therefore, we conducted this case series analysis to compare the dosimetric differences among helical tomotherapy (TOMO), volumetric modulated arc therapy (VMAT), and intensity-modulated Article on Volumetric modulated arc therapy (VMAT) vs. 91. serial tomotherapy, step-and-shoot IMRT and 3D-conformal RT for treatment of prostate cancer Radiother Oncol , 93 ( 2009 ) , pp. 22. 02), higher average D98%-PTV (P = . serial tomotherapy, step-and-shoot IMRT and 3D conformal RT for treatment of prostate cancer Radiother Oncol. It also discusses treatment volumes defined in ICRU 83 like Those authors observed substantially lower results for V18Gy < 50%Vol: 10% vs. Sign In Create Free Account. [Google Scholar] The mean values, standard deviations and statistical comparison results of the data for D max and D 95 doses obtained in four different techniques for PTV-70Gy and PTV-56Gy are shown in Table 1, Table 2. The aim of this study was to compare radiotherapy plans for Stage I-II nasal natural killer/T-cell lymphoma (NNKTL) using helical tomotherapy (HT), volumetric-modulated arc therapy (VMAT), Fixed-Field intensity-modulated radiotherapy (IMRT), and three-dimensional conformal radiotherapy (3D-CRT). 1. Wolff, F. 04 6565 6399 -2. However, In terms of the D98% of PTV WB, HyperArc plans was found to have the highest value, followed by Ethos, Tomotherapy and finally VMAT (p < 0. 02 (Elekta AB, Stockholm, Sweden). Methods: Based on CT datasets of 9 patients treated for Volume-modulated arc therapy (VMAT) and helical tomotherapy (HT) are gaining increasing attention compared with conventional fixed-field IMRT (FF-IMRT, 5/7/9-field). Prior to implementing VMAT into their clinical routine in December 2008, the authors evaluated the dose calculation/delivery The TomoTherapy treatment planning system, a planning station version 5. With a median follow-up of 52 months (95% CI: 47. Supporters of tomotherapy would argue that range of beam angles possible using fixed-gantry IMRT or VMAT is limited by the need to avoid collision between the linac head with the patient or couch. The prescribed dose was 4500 cGy in 25 fractions. Twelve patients with non-anaplastic thyroid cancer at high risk of local relapse received adjuvant external beam radiotherapy with curative intent in our institution, using a two For T3 stage patients, VMAT showed an advantage in the superior temporal gyrus and limbic lobe, while IMRT showed an advantage in the posterior cerebellum. This allows doctors to confidently target the tumor and minimize side effects due to the ability to use small margins VMAT IGRT IMRT - VMAT: Volumetric Modulated Arc Therapy | Florida Prostate Care, in Jacksonville | Talk to Prostate Cancer Experts: 888-339-0588 Talk to a Prostate Cancer Treatment Expert Now: 888-339-0588 Background This study aimed to evaluate an a-priori multicriteria plan optimization algorithm (mCycle) for locally advanced breast cancer radiation therapy (RT) by comparing automatically generated VMAT (Volumetric Modulated Arc Therapy) plans (AP-VMAT) with manual clinical Helical Tomotherapy (HT) plans. It occurs more commonly in Asians, Mexicans and South Americans than in Western populations [2–5]. 14 compared VMAT with static gantry IMRT, 3DCRT, and serial tomotherapy and found that serial tomotherapy plans resulted in the highest plan quality, and VMAT was the most efficient in Volumetri0063 modulated ar c therapy (VMAT) vs. 05 versus CK), however we obtained no relevant differences between techniques at the high dose. Giuliano and others published Head and neck district irradiation: VMAT vs tomotherapy | Find, read and cite all the research you need on ResearchGate In this study, we compared the dose-volume parameters for treatment of thoracic esophageal cancer with treatment plans for 3D-CRT, IMRT, IMAT and HT. About 80% of cases diagnosed with localized Ijazathy Puteri Binti Paizol (A155631) Radiotherapy is an essential postoperative treatment for grade II gliomas. HT also resulted in higher mean skin strip doses (944. VMAT planning systems are still in the early stages of clinical application. Several planning studies have compared the two modalities, but there have been no consensus Recent planning studies have compared VMAT with conventional delivery techniques such as IMRT, 3D conformal (3DCRT) and tomotherapy for prostate radiotherapy. Then, we retrospectively analyzed 8 PGC patients after receiving irradiation with a prescribed dose of 50. A major difference between the two treatments is a technical one. 86. The dose distributions of 53. Recent advances in radiation techniques include the use of intensity-modulated radiotherapy (IMRT), volumetric-modulated arc therapy (VMAT) and stereotactic radiosurgery (SRS). Wenz, F. 33%, P = 0. At the last Directed Reading Article An Introduction to the Intensity-modulated Radiation Therapy (IMRT) Techniques, Tomotherapy, and VMAT Craig Elith, BApSci(MRS)a*, Shane E. Studies comparing different radiotherapy treatment techniques—such as volumetric modulated arc therapy (VMAT) and helical tomotherapy (HT)—typically compare one treatment plan per technique. V12 Gy was significantly lower with GK vs both 6‐MV FFF and 10‐MV FFF for the per‐target analysis. X-20MV; p The purpose of the present study is to compare hybrid [three-dimensional conformal radiation therapy-volumetric-modulated arc therapy (3DCRT-VMAT)] and helical tomotherapy (HT) techniques in terms of both planning target In terms of the D98% of PTV met, the helical Tomotherapy plan had the highest value (P<0. Although MU values were different for all treatment techniques, the highest MU value was in tomotherapy, while the lowest value was calculated in the VMAT Tomotherapy consistently achieved lower D mean values for parotids, oral cavity, and lips compared to the other techniques. cancer. 08. 6% vs. Here we compare their performance for prostate cancer treatment. External radiation therapy is when a beam of radiation is directed into the body. 050) for small and medium tumors (p<0. 11, 12, 13 Wolff et al. VMAT seemed to be the optimal technique for NSCLC. 71cGy for VMAT, p=0. 3%, p = 0. 5. There are no significant differences in the VMAT treatments can significantly reduce the time and monitor units required to deliver a patient's treatment. Tomotherapy® is a type of IMRT that uses a machine that is a combination of a CT scanner and an external-beam radiation machine. 28: 3. No differences were observed in the two radiation techniques (tomotherapy [TOMO] vs. Volumetric intensity-modulated arc therapy vs. For T4 stage patients, VMAT showed a disadvantage in protecting the normal brain tissue. Introduction: Although intensity-modulated radiotherapy (IMRT), volumetric-modulated arc therapy (VMAT) and tomotherapy (TOMO) are broadly applied for nasopharyngeal carcinoma (NPC), the best technique remains unclear. 4. 932 vs. VMAT. The mean values, standard deviations and statistical comparison results of the data of total MU, delivery time, HI and CI index calculated from the planning of four different techniques are shown in Table 3, Table 4. Also, the time required to deliver non-coplanar IMRT would be increased by the need to repeatedly adjust the couch rotation, a maneuver that also has the potential to disturb the Of note, statistically significant findings reported patients treated with fixed-gantry IMRT delivered with a sliding window technique presented a significantly higher risk of acute Grade III (or more) toxicity compared to those treated with VMAT or helical tomotherapy (38. Der Vorteil ist, dass für unterschiedliche Einstrahlwinkel das Gerät nicht neu Given that the planned D 2max dose in the kidneys was lower for VMAT than for TomoTherapy (9. Materials Keywords: Endometrial cancer, Monte Carlo, NTCP, tomotherapy, TCP, VMAT. Methods: The priority-classified plan optimization model was Aims: Dosimetric comparison of VMAT with IMRT in middle third esophageal cancer for planning target volume (PTV) and organs at risk (OAR). One study found that the VMAT mean treatment time was 1. The study enrolled 30 cervical cancer patients treated with TOMO at our center. Linac VMAT for Lower Extremity Sarcomas . Es handelt sich um eine Weiterentwicklung der IMRT. Our facility, for the most part, relies on the Tomotherapy unit for this type of delivery. In fact, radiation-induced toxicity to the other OARs, including the Volumetric intensity-modulated arc therapy vs. 0001). 16 There are many ways to deliver IMRT. The calculated beam-on time of the MRI-based IMRT was approximately 4-times larger than that of VMAT on Radiation therapy plays a critical role in the management of brain tumors. 013) than VMAT in SIB cases in the treatment of brain metastasis in RPA This study aimed to develop an automated Tomotherapy (TOMO) planning method for cervical cancer treatment, and to validate its feasibility and effectiveness. Methods and materials Thirty patients Skin toxicity was 21% vs 36%, GI grade 3+ (G3+) 23% vs 49%, and hematological toxicity grade 2+ (G2+) 73% vs 85% in favor of dose painted IMRT. Both VMAT and IMRT plan were generated in VMAT and HT plans were delivered using Elekta's PreciseBeam VMAT linac control system (Elekta AB, Stockholm, Sweden) and a TomoTherapy Hi-Art II system (TomoTherapy Inc. 04) and HT (95. 5 mm. However, comparative dosimetric studies of different radiotherapy plans for grade II gliomas are still lacking. However, there was no significant difference in the D 2 and D mean values between VMAT and ff-IMRT techniques (p > 0. Lohr Dept. 5% vs 15. The whole urinary bladder experienced the best shielding by SW and VMAT at the medium dose (V18 Gy, p < 0. 20 reported that VMAT plans There are two main types of radiation therapy. 05). Request PDF | On Dec 31, 2014, L. It occurs more commonly in Asians, Mexicans and South Americans than in Western populations [ 2 – 5 ]. 39). Angiosarcoma of the scalp (AS) is the most common type of angiosarcoma and has a markedly unfavorable prognosis. , Madison, WI accomplishments for helical tomotherapy and VMAT, respectively. Article Considering the superior plan quality as well as the delivery efficiency of VMAT compared with that of IMRT, VMAT may be the preferred modality for treating prostate cancer. Image Guided Radiation Therapy (IGRT) Image guided radiation therapy, or IGRT, has the ability to better deliver the radiation to the cancer since tumors can move between treatments due to differences in organ shapes. VMAT also provides reduced MU and thus reduces the whole body radiation as compared to similar cases with IMRT. [] has employed the partial-field technique in volumetric modulated arc therapy (VMAT) for WBRT and has reported reduced hippocampal dose; however, exact doses to the other OARs have not been described. Author links open overlay panel Elizabeth Ren Zhang-Velten 1 †, David Parsons 1 †, Pam Lee 1, Eric Chambers 1, Ramzi Abdulrahman 1 2, Neil B. " Keywords: Helical tomotherapy, VMAT, IMRT, Nasal natural killer/T-cell lymphoma, Dosimetry Background The incidence of NNKTL accounts for 2–10% of the cases of primary non-Hodgkin’s disease [1]. Conventional IMRT, tomotherapy and VMAT typically produce dose distributions of similar quality. serial tomotherapy and segmental (step and shoot) IMRT for treatment of prostate cancer. Two VMAT approaches (one rotation (VMAT1x) and one rotation plus a second 200° rotation (VMAT2x)) were calculated for the plan comparison. Ana Faustino, Academic Editor, 2877 Volumetric Intensity Modulated Arc Therapy (VMAT) vs. 14 These techniques aim to minimize radiation dose to the hippocampus while maintaining effective treatment of the whole VMAT seemed to be the optimal technique for NSCLC. VMAT treatments can significantly reduce the time and monitor units required to deliver a patient’s treatment. 2012 Jul 15;83(4):1169-78. Three arcs covered the whole target and optimized treatment objectives simultaneously. CyberKnife and TomoTherapy are both optimal RS devices, the choice to us A dosimetric comparison between CyberKnife and tomotherapy treatment plans for single brain metastasis Radiol Purpose: To investigate the feasibility of volumetric modulated arc therapy (VMAT) for post-mastectomy radiotherapy (PMRT) and to compare dual-arc VMAT treatment plans to helical tomotherapy (HT) plans on the basis of dosimetric quality, radiobiological calculations and delivery efficiency. Based on CT datasets of 9 patients treated for prostate cancer step-and-shoot IMRT, serial tomotherapy (MIMiC), 3D-CRT and VMAT were compared with regard to plan quality and treatment efficiency. 1 These techniques can be thought of as cousins, since they share a common concept of modulating A total of 308 patients were analyzed; 165 were treated using 5-field IMRT between March 2010 and April 2014, 66 with tomotherapy between July 2012 and March 2017, and 77 with VMAT between May 2015 and February 2018. Therefore, this study was conducted to address this issue. 011. Planning dosimetry in the supine simulated position of the 15 patients receiving RT compared IMRT with VMAT; the VMAT treatment plan had a lower hot spot dose (p=0. Eight patents with Stage I-II NNKTL treated with IMRT were This study confirms the interest of VMAT and tomotherapy for pelvic and para-aortic lymph nodes irradiation of cervix cancer when compared with conformational radiotherapy. Radiother Oncol 2009; 93: 226 – 233. 2) and was met by all but one patient in the VMAT group. Tomotherapy: Comparison Study • Collaborative study between Swedish Cancer Institute and University of Advanced treatment modalities like intensity modulated radiotherapy (IMRT), volumetric modulated arc therapy (VMAT), and helical tomotherapy (HT) have highly Purpose: Helical tomotherapy (HT) and volumetric modulated arc therapy (VMAT) are arc-based approaches to IMRT delivery. 860 and 0. Materials and methods VMAT was implemented on a SynergyS® linear VMAT ist eine Bestrahlungstechnik, die es erlaubt mittels Linearbeschleuniger einen Tumor oder anderen Zielbereich mit unterschiedlichen Intensitäten zu bestrahlen, während das Bestrahlungsgerät um den Patienten rotieren kann. Which technique is most suited to treat a patient will depend on considerations such as the availability of the specific treatment type Conclusion: Tomotherapy is superior to VMAT in terms of most dosimetric parameters, with less acute mucositis and better short-term efficacy. Therefore, there Dosimetric comparison among cyberknife, helical tomotherapy and VMAT for hypofractionated treatment in localized prostate cancer December 2020 Medicine 99(50):e23574 VMAT - faster treatments and lower radiation dose to you. VMAT plans used two full, Abo-Madyan Y, Mai S, Herskind C, Polednik M, Steil V, Wenz F, Lohr F. 95 minutes and the HT time was 9. 05), and those in TD were significantly lower than VMAT and ff-IMRT (all p < 0. 78 Given that the planned D 2max dose in the kidneys was lower for VMAT than for TomoTherapy (9. 8) was used to generate IMRT and VMAT plans by using 6 or 10 MV. 1% and We performed this dosimetric study to compare a nonstandard volumetric modulated arc therapy (VMAT) and helical tomotherapy (HT) techniques with high-dose rate (HDR) brachytherapy (BRT) plan of vaginal vault in patients with postoperative endometrial cancer (EC). 02) and homogeneity A significant reduction in MLD was found when grouping both VMAT techniques and comparing to HT (); however, no significant difference was found between the two VMAT techniques. Shorter treatment The difference observed between the rectum V 30 values between techniques in our study (tomotherapy vs. The combination of these technologies allows doctors to adjust the radiation beam to better match the location, size and However, the differences between the IMRT and VMAT plans in all the dosimetric indices decreased as the number of beams used in IMRT increased. 6 There also exists a wide variety of planning techniques, When high-dose modulation was required around small organs at risk (OARs), a clinically acceptable IMRT plan was achieved as VMAT usually required longer dose optimisation time. radonc. It is also called x-ray therapy, 3D conformal radiation, intensity-modulated radiation therapy (IMRT), cobalt, photon, or proton therapy. The V30Gy in the Advancements in radiotherapy technology have led to the adoption of various modalities for HA-WBRT, including intensity-modulated radiation therapy (IMRT), 11 volumetric-modulated arc therapy (VMAT), 12,13 and tomotherapy (TOMO). 1 They found that 100% of physician respondents were open to refining the conventional TBI technique to reduce lung dose and 75% of respondents were interested in implementing volumetric modulated arc therapy From such results, it is possible to deduct that VMAT is able to spare the rectum at the intermediate dose whereas there is not a large differences at high doses D 2% (3620 ± 80 cGy, 3420 ± 90 cGy, 3600 ± 100 cGy, CK, VMAT, and HT, respectively) and D 5% (3420 ± 110 cGy, 3020 ± 120 cGy, 3200 ± 200 cGy, CK, VMAT, and HT, respectively), even if the highest There are a variety of techniques available to deliver CSI, including standard 3-dimensional conformal radiation therapy (3DCRT) with the patient positioned prone or supine, intensity modulated radiation therapy (IMRT), volumetric modulated arc therapy (VMAT), helical Tomotherapy, and proton beam. 84 ± 1. 36 Gy; P=0. 0246). For delivery efficiency, our meta-analysis showed that MUs were significantly decreased in VMAT plans, which had been supported by numerous studies. Depending on stage at diagnosis, 5 year survival rates can vary between 15-81%, with an average 5 year IMRT vs. 4214). 3 (53. All 30 PMRT patients were planned in three treatment techniques, to decrease the bias of the treatment planners. No significant difference in CI between VMAT 6‐MV FFF and 10‐MV FFF was observed. Polednik, V. Compared to MRI-guided adaptive brachytherapy, which is recommended as gold standard imaging for cervical cancer contours, CT-guided adaptive brachytherapy (CTGAB) is more available, more widespread, Background To compare the dosimetric, normal tissue complication probability (NTCP), secondary cancer complication probabilities (SCCP), and excess absolute risk (EAR) differences of volumetric modulated arc therapy (VMAT) and intensity-modulated radiation therapy (IMRT) for left-sided breast cancer after mastectomy. IMRT • tw. 4 Gy). Medicine. At Purpose: To investigate the feasibility of volumetric modulated arc therapy (VMAT) for post-mastectomy radiotherapy (PMRT) and to compare dual-arc VMAT treatment plans to helical tomotherapy (HT) plans on the basis of dosimetric quality, radiobiological calculations and delivery efficiency. Also, the time required to deliver non-coplanar IMRT would be increased by the need to repeatedly adjust the couch rotation, a maneuver that also has the potential to disturb the Moreover, a comparison between both helical tomotherapy and VMAT approaches in terms of target volume coverage, OARs sparing and beam-on time was also carried out. Die beiden Verfahren werden in unserer Klinik routinemäßig eingesetzt. 14 compared VMAT with static gantry IMRT, 3DCRT, and serial tomotherapy and found that serial tomotherapy plans resulted in the highest plan quality, and VMAT was Bestrahlungsplanung - VMAT: • Plan-Qualität – vergleichbare Ergebnisse VMAT vs. Both could provide better coverage of the planning target volume (PTV) and sparing of organs at risk (OAR) than conventional IMRT. D. 07 vs. 0036) and homogeneity index (HI, p=0. Med Phys. 25cGy vs. 2–56. All 30 PMRT patients were planned in three treatment techniques Volumetric modulated arc therapy (VMAT) vs. 23: 3. Learn how VMAT Intensity modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT) are two commonly used EBRT techniques to treat cancer. Verbakel WF, Cuijpers JP, Hoffmans D, Bieker M, Slotman BJ, Senan S. also reported excellent In this study, the VMAT beam-on time was found to be significantly shorter than it was for Tomotherapy (1. It is not currently achievable for virtual SBRT HDR BT to replicate the high intraprostatic doses present in HDR BT while A volumetric modulated arc therapy (VMAT) vs. Abo-Madyan, M. 95 vs. VMAT vs. DVHs for different approaches for PTV and posterior rectum including the 95% confidence limits to show the spread of the investigated values. 988) compared to HT (mean 1. The objective of this study is to compare VMAT to both HT and VMAT is a radiation therapy technique that delivers radiation with a multileaf collimator in a continuous dynamic mode during a single or multiple rotations of the gantry. 2009; 93 :226-233 Full Text IMRT und VMAT sind moderne hochpräzise Bestrahlungstechniken, mit der sich besonders empfindliche Organe optimal schützen lassen. serial tomotherapy, step-and-shoot IMRT and TomoTherapy demonstrates the advantage of being a device capable to reach different clinical objectives depending on the different planning modality employed. 3D-CRT plans delivered higher Purpose: Conventional techniques (3D-CRT) for craniospinal irradiation (CSI) are still widely used. In multicenter prospective trials with IMRT, quality assurance (QA) of RT planning is mandatory [10, 11]. 15. Was ist IMRT? Die intensitätsmodulierte Radiotherapie, abgekürzt IMRT, ist eine Weiterentwicklung der 3D-konformalen Strahlentherapie, mit der sich Wolff D, Stieler F, Abo-Madyan Y, Polednik M, Steil V, Mai S, Wenz F, Lohr F. 677: D mean: 3. Radiother Oncol (2009) M. These results indicate that IMRT and VMAT have their own advantages in sparing different organs at risk Dosimetric comparison among cyberknife, helical tomotherapy and VMAT for hypofractionated treatment in localized prostate cancer December 2020 Medicine 99(50):e23574 IMRT, volumetric modulated arc therapy (VMAT), and helical tomotherapy (HT) are routinely used to treat patients with head and neck cancer. 2. 4 Gy. The project aimed to assess the potential of using stereotactic body radiotherapy (SBRT) for boost treatment of high To evaluate and compare dosimetric parameters of volumetric modulated arctherapy (VMAT) and helical tomotherapy (HT) for non-anaplastic thyroid cancer adjuvant radiotherapy. Together with publicly shared autoplanning scripts, our technique may provide the gateway for wider adaptation of this technology and the possibility of multi-institutio The Stanford Volumetric Modulated Arc Therapy Total Body Irradiation Like tomotherapy, VMAT plans take longer than fixed-gantry IMRT plans to generate. 049). Matulewicz and others published PO-0843: Tomotherapy vs. • Initial VMAT work has focused almost exclusively on coplanar delivery Planning Parameters • 1 arc is sufficient for simple cases such as prostate, but 2 arcs are needed for more Table 1 An overview of all investigated DVH-parameters as mean values ± standard deviation (SD). Compare a volumetric-modulated arc therapy (VMAT) and helical TomoTherapy (HT) for the irradiation of oropharyngeal cancer in terms of target coverage and doses to OAR, both for sequential (SBT IMRT, volumetric modulated arc therapy (VMAT), and helical tomotherapy (HT) are routinely used to treat patients with head and neck cancer. The authors have no funding and conflicts of interests to disclose. 4, the D 2, D 98, D mean, and V 100% values in HT were significantly lower than other plans (all p < 0. Utilizing scripting and Python environment within the RayStation (RaySearch Labs, Sweden) treatment planning system VMAT and IMRT plans were calculated in Eclipse with AAA algorithm (Anisotropic Analytical Algorithm, Varian Medical Systems). - "Volumetric modulated arc therapy (VMAT) vs. 78 5125 5179 1. Compared to TOMO and IMRT, VMAT achieved better target dose distribution and similar sparing of critical structures. Radiother Oncol 2009, 93: 226-233. 04). 001). VMAT for ottal marrow irradiation | Find, read and cite all the research you need on ResearchGate We found that VMAT, TomoTherapy, and CK SBRT were able to achieve PTV coverages comparable to HDR BT (as shown in Fig. 3), but that there was considerable variability in approximating the equivalent heterogeneous target doses. 015. Skip to search form Skip to main content Skip to account menu. VMAT uses low monitor units (MUs) and A comprehensive overview of VMAT capable treatment planning systems and techniques for various tumor sites. 78 For CSI, VMAT provides comparable normal tissue sparing with tomotherapy and may reduce the integral dose. 3e54. Questions have been developed with the goal of helping the reader assess their knowledge of topics related to the clinical use of IMRT/VMAT. A dosimetric study was undertaken to assess the ability of Cyberknife (CK), Volumetric Modulated Arc Therapy (VMAT), and TomoTherapy (Tomo) to generate treatment plans that mimic the dosimetry of high dose-rate brachytherapy (HDR BT) for prostate cancer. 8)Gy(P¼0. 0(55. 59 869 923 5. 6 There also exists a wide variety of planning techniques, Radiotherapy is an essential postoperative treatment for grade II gliomas. Materials and methods: Ten patients in various stages from I‒III were inducted in the neo-adjuvant chemoradiation protocol for this study. Elith et al. VMAT: 56. Volumetric Modulated Arc Therapy (VMAT) is a new radiation therapy technique that allows our team to deliver more tightly focused treatments to your cancer in a significantly shorter time. Da-durch wird die Gesamtbehandlungsdauer um bis zu eineinhalb Wochen verkürzt. 1 Gy), the absolute values of the delivered dose looked acceptable (11. QA for RT of head and neck cancer does not only include the quality of RT plans, but begins earlier in the treatment Intensity-modulated proton therapy (IMPT), non-coplanar 4π intensity-modulated radiation therapy (IMRT), and volumetric-modulated arc therapy (VMAT) represent the most advanced treatment methods based on heavy ion and X-rays, respectively. serial tomotherapy, step-and-shoot IMRT and 3D-conformal RT for In the treatment of NPC, previous studies have shown that tomotherapy is superior or equivalent to VMAT in most dosimetric parameters, including the dose coverage of target volumes and the The two modern radiation therapy techniques, VMAT and HT, are the major innovations in high-precision radiation therapy. A comprehensive comparison of IMRT and VMAT plan quality for prostate cancer treatment Int J Radiat Oncol Biol Phys. The hypo-fractionated regimen allows the administration of high doses of radiation in a small number of fractions; such a fractionation is possible by exploiting the In order to prevent suboptimal MLC movements during hippocampal sparing, Shen et al. Read the article Volumetric modulated arc therapy (VMAT) vs. Methods: Dual-arc VMAT and HT treatment plans were created for fifteen Tomotherapy® What it is. 5Gy, V5Gy, V10Gy, V15Gy, V20Gy, Dmin, Dmax, and Dmean of the bilateral lungs in the h-IMRT plan were all statistically lower than those in the VMAT plan. 011 Google Scholar In the SRS cases presented by Borghetti et al. 02 vs. 226 - 233 View PDF View article View in Scopus Google Scholar Although no statistically significant difference was noted in the target coverage between the two VMAT plans, EA-TVD VMAT significantly reduced the mean heart dose (3. The hypo-fractionated regimen allows the administration of high doses of radiation in a small o identify the effect of radiotherapy (RT) on PGC. Wolff et al. Here, we conduct a study to compare HT and partial-arc VMAT in their ability to spare organs at risk (OARs) when stereotactic ablative radiotherapy (SABR) is delivered to treat centrally To compare the dosimetric results of helical tomotherapy (HT) and volumetric arc therapy (VMAT) in the treatment of anal cancer. Scientific Reports - Dosimetric comparison of the helical tomotherapy, volumetric-modulated arc therapy and fixed-field intensity-modulated Importance: Irradiation treatment for pediatric patients with neuroblastoma represents a major challenge due to the pediatric dose limits for critical structures and the necessity of sufficient dose coverage of the clinical target volume for local control. 56 1066 1091 2. 1 (0. Helical tomotherapy and volumetric modulated arc therapy (VMAT) are two arc-based approaches to delivering of IMRT. In terms of HI, VMAT plans consistently showed better dose homogeneity (1. In this method, a film is placed between the patient and the couch top during treatment as can be seen with a phantom example in Figure 8. With smaller bilateral hippocampal tissues doses, the planning target volume dose changed across 3 dosimetry regions for both modalities; the plateau region (>20. The MU of the MRI-based IMRT was twice that of VMAT on average (8373 MU for MRI-based IMRT versus 4173 MU for VMAT, p < 0. volumetric-modulated arc therapy [VMAT]). Both techniques had similar coverage of the PTVs (p=0. 1–3] vs. Tomotherapy Inc. " by C. Int J Radiat Oncol Biol Phys (2009) D. HT treatments delivered by TomoTherapy unit were computed with a convolution-superposition algorithm (C/S) based on a collapsed cone (CCC) approach (TomoTherapy Planning System, Accuray Request PDF | On Dec 1, 2021, A. [Google Scholar] 5. Radiother Oncol. Noncoplanr VMAT • An advantage of VMAT relative to tomotherapy is the availability of non-coplanar arcs. • Fixed field IMRT, VMAT, and Tomotherapy were compared in terms of plan quality, delivery time, and delivery accuracy. 48 Toxicity and survival rates for anorectal VMAT has the characteristics of being fast, accurate, and optimum. 095). The homogeneity index (HI) differed Supporters of tomotherapy would argue that range of beam angles possible using fixed-gantry IMRT or VMAT is limited by the need to avoid collision between the linac head with the patient or couch. However, VMAT plans were created using Mon-aco version 5. 33. Eight patients included in this study had left-sided breast cancer and eight had right-sided breast cancer. In terms of the DVH values for IMRT and CyberKnife, we obtained significantly lower rectal doses than Ceylan and colleagues 21 for all constraints with IMRT. 11–13 Wolff et al. 5 J, P ¼ . Conventional IMRT, tomotherapy and VMAT typically produce dose to tomotherapy in terms of plan quality and delivery efficiency. Marcello Serra, 1, * Fortuna De Martino, 2 Federica Savino, 3 Valentina d’Alesio, 1 Cecilia Arrichiello, 1 Maria Quarto, 2 Filomena Loffredo, 2 Rossella Di Franco, 1 Valentina Borzillo, 1 Matteo Muto, 4 Gianluca Ametrano, 1 and Paolo Muto 1. QA for RT of head and neck cancer does not only include the quality of RT plans, but begins earlier in the treatment Wolff D, Stieler F, Welzel G, Lorenz F, Abo-Madyan Y, Mai S, et al. 2009. Tomotherapy® machines take images of the tumor right before Volumetric modulated arc therapy (VMAT) vs. Radiother Oncol 2009;93:226‑33. tomotherapy plans. 12% vs. 6,7 Radiotherapy (RT) with or without tumor excision is Wolff D, Stieler F, Welzel G, Lorenz F, Abo-Madyan Y, Mai S, et al. 5 Gy [2. Two sets of dual-arc Wolff D, Stieler F, Welzel G, Lorenz F, Abo-Madyan, Sabine M, et al. 672 for SmartArc and 3D-CRT). Serial Tomotherapy and Segmental (Step and Shoot) IMRT for Treatment of Prostate Cancer D. Methods The study included 25 patients who . (IMRT), volumetric modulated arc therapy (VMAT), heli-cal Tomotherapy, and proton beam. Comparison of Elekta VMAT with helical tomotherapy and fixed field IMRT: Plan quality, delivery efficiency and accuracy. Objective: To investigate dosimetric differences between tomotherapy (TOMO) and volumetric-modulated Comparative Plan Analysis : Helical Tomotherapy vs. The project aimed to assess the potential of using stereotactic body radiotherapy (SBRT) for boost treatment of high There are a variety of techniques available to deliver CSI, including standard 3-dimensional conformal radiation therapy (3DCRT) with the patient positioned prone or supine, intensity modulated radiation therapy (IMRT), volumetric modulated arc therapy (VMAT), helical Tomotherapy, and proton beam. Mai, F. , there was no statistical difference in OARs between VMAT and helical IMRT, but HT was generally better in terms of maximal doses, particularly for the optic chiasm (30. Generally, the CK demonstrated significantly superior rectum and bladder exposure at V18 Gy as compared to HT, SW, and VMAT. serial tomotherapy, step-and-shoot IMRT and 3D-conformal RT for treatment of prostate cancer. Dosimetric comparison between the Radixact™ and Tomotherapy is superior to VMAT in terms of most dosimetric parameters, with less acute mucositis and better short-term efficacy. 1. Semantic Scholar's Logo. , associate professor of radiation oncology physics and director of clinical Unlike fixed-field IMRT, VMAT allows simultaneous motion of gantry, MLC and dose rate using dynamic modulated arcs, resulting in increased conformality and enhanced sparing This analysis compares VMAT against established IMRT and 3D-conformal radiation therapy (3D-CRT) delivery techniques. The dosimetric comparison revealed distinct strengths and weaknesses for each radiotherapy technique. 7), the 2-year overall survival and progression-free survival were 74. Most of the treatment deliveries were <100 minutes (range 33-147, mean 72). 11 Gy; P=0. However, VMAT plans were created using Monaco version 5. 6 J, P ¼ . 6 (Accuray, Incorporated, Sunnyvale, CA, USA) was used to create the TomoDirect and Helical tomotherapy plans. 685: 0. Although no statistically significant difference was noted in the target coverage between the two VMAT plans, EA-TVD VMAT significantly reduced the mean heart dose (3. However, the differences between the IMRT and VMAT plans in all the dosimetric indices decreased as the number of beams used in IMRT increased. Purpose: To compare the dosimetric characteristics of helical tomotherapy (HT), volumetric-modulated arc therapy (VMAT), intensity-modulated radiotherapy (IMRT), and tangential field-in-field technique (FIF) for the treatment of synchronous bilateral breast cancer (SBBC). Volumetric modulated arc therapy (VMAT) vs. 1-5 Local recurrence is one of the main causes of treatment failure, in addition to lung metastasis. 2011. 4 With the reduced acute toxicity and similar control rates as seen with IMRT, increasingly more centers treat this cancer with a form of IMRT, such as static field, volumetric modulated arc therapy (VMAT), helical Background Helical tomotherapy (HT) and volumetric modulated arc therapy (VMAT) are both advanced techniques of delivering intensity-modulated radiotherapy (IMRT). Lung Case. These techniques allow better homogeneity and control of the target prescription dose, and provide more No differences were observed in the two radiation techniques (tomotherapy [TOMO] vs. In the SRS cases presented by Borghetti et al. KEYWORDS Nasopharyngeal carcinoma, tomotherapy, VMAT, dosimetry, clinical outcomes Dosimetric comparison of vaginal vault brachytherapy vs applicator-guided stereotactic body radiotherapy with volumetric modulated arc therapy and helical tomotherapy for endometrium cancer patients case vmat imr t vp vmat imr t vp vmat imr t vp vmat imr t vp 1 3482 3507 0. Yoo et al. 014),forhelicaltomotherapy and VMAT, respectively. 11. This analysis compares VMAT against established IMRT and 3D-conformal radiation therapy (3D-CRT) delivery techniques. VMAT-FFF, a Dosimetric Study . • 6 prostate, 6 head-and-neck, and 6 lung cases were selected for this study. 0154) and better conformity index (CI, p=0. 03 ± 0. 09. 91 vs. While the technique and initial institutional experiences are now well reported, minimal data exist comparing clinical outcomes and toxicities to conventional TBI (cTBI). In From such results, it is possible to deduct that VMAT is able to spare the rectum at the intermediate dose whereas there is not a large differences at high doses D 2% (3620 ± 80 cGy, 3420 ± 90 cGy, 3600 ± 100 cGy, CK, VMAT, and HT, respectively) and D 5% (3420 ± 110 cGy, 3020 ± 120 cGy, 3200 ± 200 cGy, CK, VMAT, and HT, respectively), even if the highest doses Request PDF | On Oct 1, 2011, A. Warren-Forward, BSc(Hons), PhDb aBritish Columbia Cancer Agency, Fraser Valley Centre, BC, Canada bSchool of Health Semantic Scholar extracted view of "An Introduction to the Intensity-modulated Radiation Therapy (IMRT) Techniques, Tomotherapy, and VMAT. 37: 0. 7), the 2-year overall sur- In recent and coming years, many centers are changing their technical setup from a conventional TBI technique to multi-isocenter conformal arc therapy techniques such as Volumetric Modulated Arc Therapy (VMAT) or Helical Tomotherapy (HT). Tomotherapy: Comparison Study • Collaborative study between Swedish Cancer Institute and University of Virginia. 29 2 4125 4287 3. Median patient age was 41 years (32–47 years). Twelve postoperative patients with early stage EC were included in this study. Oropharynx was the primary tumor location. Arbeitsersparnis bei der Planung, in Abhängigkeit gewählter Hilfsstrukturen und Startparameter, aber keine Zeitersparnis aufgrund langer Rechenzeiten • Im Vergleich zur Tomotherapie sind die Tomo-Pläne bei komplexen! Zielvolumina noch etwas besser Volumetric modulated arc therapy (VMAT), a complex treatment strategy for intensity-modulated radiation therapy, may increase treatment efficiency and has recently been established clinically. 13 for tomotherapy and 3D-CRT). For a 14-year-old patient, we aimed to compare dose distributions of five CSI techniques applied across Europe and generated according to the The new TomoDirect (TD) modality offers a nonrotational option with discrete beam angles. There was little difference between VMAT and tomotherapy, except for kidney sparing, which was better with tomotherapy and thus In comparison to IMRT, which has been proven to be superior to conventional 3DCRT, 20-24 VMAT displayed a reduction to dose to bladder, bowel and rectum and achieved better PTV coverage with improved conformity and homogeneity. Conclusion In conclusion, HT offers better dose homogeneity, while VMAT excels in conformity, particularly for SBRT for Localized Prostate Cancer: CyberKnife vs. The mean nontarget tissue integral dose for VMAT of 80. IMRT plan quality was similar or superior to that of VMAT when the number of beams in IMRT was increased to a certain number, which ranged from 12 to 24 for the set of patients studied. of Radiation Oncology, Mannheim, Germany Purpose/Objective(s): VMAT, a treatment strategy for intensity-modulated radiation Purpose: To investigate the feasibility of volumetric modulated arc therapy (VMAT) for post-mastectomy radiotherapy (PMRT) and to compare dual- arc VMAT treatment plans to helical tomotherapy (HT Purpose: To investigate the feasibility of volumetric modulated arc therapy (VMAT) for post-mastectomy radiotherapy (PMRT) and to compare dual- arc VMAT treatment plans to helical tomotherapy (HT) plans on the basis of dosimetric quality, radiobiological calculations and delivery efficiency. Materials and Methods A retrospective analysis of patients with a MPM diag-nosis treated at our centre, who underwent pleurectomy/ For the same PTV coverage, the AIP-generated VMAT plans had significantly better plan quality in terms of rectum sparing than the eight-beam clinical and AIP-generated IMRT plans (p < 0. 20Gy and above obtained in the target volumes of primary tumor and neck elective lymph nodes in the coronal, axial and sagittal A dosimetric study was undertaken to assess the ability of Cyberknife (CK), Volumetric Modulated Arc Therapy (VMAT), and TomoTherapy (Tomo) to generate treatment plans that mimic the dosimetry of high dose-rate brachytherapy (HDR BT) for prostate cancer. 17% (IMRT); and 12% vs. 32. How to cite this article: Serra M, Ametrano G, Borzillo V, Quarto M, Muto M, Di Franco R, Federica S, Loffredo F, Paolo M. Therefore, we conducted this case series analysis to compare the dosimetric differences among helical tomotherapy (TOMO), volumetric modulated arc therapy (VMAT), and intensity-modulated modulated arc therapy (VMAT) planning for prostate cancer Jun‑ichi Fukunaga1, Mikoto Tamura2, Yoshihiro Ueda3, Tatsuya Kamima4, Yumiko Shimizu5, Yuta Muraki5, Kiyoshi Nakamatsu6 & Hajime Monzen2 Fitzgerald et al compared 3D-CRT versus IMRT versus VMAT lung non-coplanar SABR plans for each of 20 patients in contrast to comparing plans for different patients as in our study. 50th Annual Meeting of the American-Society-for-Therapeutic-Radiology-and Oncology; 2008; Boston, MA. 6e56. We Five alternative plans for each patient were calculated with the VMAT, IMRT and TomoTherapy techniques. Compared with 3D-CRT, VMAT improved normal tissue sparing at higher doses despite larger volumes receiving lower doses. 51 ± 0. 15 thoracic esophagus patients who were when using more than 1 VMAT arc. Desai 1, Tu Dan 1, Zabi Wardak 1, Robert Timmerman 1, Madhuri case vmat imr t vp vmat imr t vp vmat imr t vp vmat imr t vp 1 3482 3507 0. 24-26 Navarria et al reviewed 86 3D-CRT and 46 coplanar Volumetric modulated arc therapy (VMAT) vs. Cam Sakura Med J. Authors Helical tomotherapy provided better target coverage, with lower average D2%-PTV (P = . According to Todd McNutt, Ph. The document discusses various aspects of intensity-modulated radiation therapy (IMRT) planning and delivery, including the use of inverse planning, optimization objectives and constraints, and different delivery methods like static field, dynamic field, tomotherapy, and VMAT. 28 5496 5699 3. However, the implementation of VMAT has significantly reduced treatment time as the gantry and MLC both move while delivering the beam . There are no significant differences in the survival outcomes between the VMAT and tomotherapy groups. 002), which may have contributed to the divergence in clinical outcomes. 0. The median homogeneity index was 0. 0 Gy for helical tomotherapy What is TomoTherapy? TomoTherapy ® is a form of image-guided radiation therapy that combines a form of intensity modulated radiation therapy (IMRT), with the accuracy of computed tomography (CT) scanning technology, in one machine. Stieler, Y. Methods: Dual-arc VMAT and HT treatment plans were created for fifteen The incidence of NNKTL accounts for 2–10% of the cases of primary non-Hodgkin’s disease [ 1 ]. Modern techniques (IMRT, VMAT, TomoTherapy ®, proton pencil beam scanning [PBS]) are applied in a limited number of centers. However, VMAT had a superior CI (mean 0. 6. 7 Gy [2. 8 J was significantly lower than for 3D-CRT (91. 58% (CyberKnife). Methods 30 patients with HNC were included, 15 treated Results: On average, tomotherapy plans showed higher CN (0. The median follow-up was 26 months. In VMAT, as the linear accelerator rotates around you, radiation beams sweep in continuous uninterrupted arcs, tightly pin-pointed on the Keywords: IMPT, VMAT, tomotherapy, angiosarcoma, scalp, dosimetry. Aims and Objectives: To compare dosimetry, toxicity patterns and loco-regional control rates of IMRT & VMAT in head and neck cancer patients treated with concurrent chemo radiation. Plans were created for 20 (n = 20) patients treated for anal cancer using HT and 2 arc VMAT. The parts of the lungs receiving doses in excess of 8 Gy included a high dose gradient and were susceptible to dose delivery variations ( Figure 6 ) . ijrobp. provides a ‘dose delivery quality assurance’ (DQA) module, which re-calculates the dose distribution one would get by delivering the patient treatment sequence onto a selected phantom. 33, 35, 36 The reason of significant reduction in MUs of VMAT came from the differences in the optimization algorithms used for VMAT and IMRT. 1] (P The best coverage results were obtained with Tomotherapy ® 21. Steil, S. 2010; 37:1350–9. reported that optimization and dose calculation took 2 and 5 minutes for conventional IMRT and approximately 15–20 minutes and 5 minutes for VMAT, respectively. The decline of HVLT-R score remained in a low level and not significant in assessable patients (p = 0. Scorsetti et To compare the dosimetric results of helical tomotherapy (HT) and volumetric arc therapy (VMAT) in the treatment of anal cancer. Further In recent years, stereotactic body radiation therapy (SBRT) has gained popularity among clinical methods for the treatment of medium and low risk prostate cancer (PCa), mainly as an alternative to surgery. Body and nontarget tissue integral doses were lowest with VMAT in every patient. To optimize the collimator angles in dual-arc volumetric modulated arc therapy (VMAT) plans for whole-brain radiotherapy with hippocampus and inner ear sparing (HIS-WBRT). Background. Background and Purpose: Volumetric modulated arc therapy (VMAT) has the potential to deliver dose distributions comparable to the established intensity-modulated radiotherapy techniques for a multitude of target paradigms. Sarnelli and others published Tomo vs VMAT vs tangential fields to reduce cardiovascular complications in breast cancer therapy | Find, read and cite all the IMRT, IMAT, RapidArc, and VMAT have progressively provided better treatment techniques. 85 No significant difference in CI between VMAT 6‐MV FFF and 10‐MV FFF was observed. The greatest benefit of VMAT has been rapid treatment delivery allowing improved patient comfort, reduced intra-fraction motion and increased patient throughput. All 30 PMRT patients were planned in three treatment techniques In recent years, stereotactic body radiation therapy (SBRT) has gained popularity among clinical methods for the treatment of medium and low risk prostate cancer (PCa), mainly as an alternative to surgery. 2020;99:50(e23574). Sümeyra Can, İlknur Harmankaya, Özge Atilla, Ayben Yentek Balkanay, Didem Karaçetin. These techniques allow better homogeneity and control of the target prescription dose, and provide more Background and Purpose The purpose of this study was to assess plan quality and treatment time achievable with the new VMAT optimization tool implemented in the treatment planning system Oncentra MasterPlan® as compared to IMRT for Elekta SynergyS® linear accelerators. We aim to compare dosimetric parameters of TD, helical tomotherapy (HT), volumetric-modulated arc therapy (VMAT), and fixed-field intensity-modulated radiotherapy (ff-IMRT) for upper thoracic esophageal carcinoma (EC). 4% vs. TOMO plans were calculated on the Tomotherapy Planning Station Hi-Art Beim brusterhaltend operierten Mammakarzinom wird die IMRT als VMAT zunehmend zur gleichzeitigen Applikation der häufig nötigen Tumorbettdosisaufsättigung im Rahmen eines simultan integrierten Boostes verwendet. Helical Tomotherapy 1-arc VMAT. Helical Tomotherapy in Terms of Tumor Control Probability and Normal Tissue Complication Probability for Endometrial Cancers. IMRT, VMAT, and helical tomotherapy are highly conformal radiation techniques widely used in head-and-neck cancers, including TOMO vs VMAT TOMO vs IMRT VMAT vs IMRT; L-lens: D max: 3. Soft Tissue Sarcomas (STS) 1affect nearly 13,500 people in the US each year. 29 For further analysis of radiation-induced lung toxicity, our study investigated the reduction in the risk of fibrosis amongst the different treatment planning techniques (); VMAT Objective A planning study was performed to evaluate dosimetric differences between intensity modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT) for head and neck cancer (HNC) for sequential boost (Seq-boost) and simultaneous integrated boost techniques (SIB). 616. Coplanar vs. To achieve that, seven diagnosed postoperative patients with grade II gliomas were analyzed by computed tomography and then The TomoTherapy treatment planning system, a planning station version 5. (D mean to the contralateral lung and the breast on VB‐VMAT vs. Search. The plan parameters of both VMAT and IMRT using an MR-linac are shown in Table 1. Dempsey, DApSci(MRT)b, Naomi Findlay, BApSci(MRS)b and Helen M. 10. 002) and brainstem (30. NoVB‐VMAT were 2. Radiation Oncology Page 3 of 11 had retropectoral implants. 8 versus 11. Calculation grid was 2. The aim of this study was to compare radiotherapy plans for Stage I-II nasal natural killer/T-cell lymphoma (NNKTL) using helical tomotherapy (HT), volumetric-modulated arc We investigated the differences between Radixact™ and VMAT treatment plans. 14. One that caught my eye is a three way comparison of Intensity Modulated Radiation Therapy (IMRT), Volumetric Modulated Arc Therapy (VMAT), and helical tomotherapy by Lee et al. These findings have potential implications in the risk of the development In recent and coming years, many centers are changing their technical setup from a conventional TBI technique to multi-isocenter conformal arc therapy techniques such as Volumetric Modulated Arc Therapy (VMAT) or Helical Tomotherapy (HT). Search 221,037,399 papers from all fields of science . fix-field IMRT: 82. 7 Deng et al. conventional imrt in head-and-neck cancer: A comparative planning and dosimetric study. Sarnelli and others published Tomo vs VMAT vs tangential fields to reduce cardiovascular complications in breast cancer therapy | Find, read and cite all the The VMAT plan was also generated using the Eclipse planning system with the anisotropic analytical algorithm. IMRT stands for intensity modulated radiotherapy, a type of conformal radiotherapy that shapes the radiation beams to fit the tumour. 013) than VMAT in SIB cases in the treatment of brain metastasis in RPA Volumetric modulated arc therapy enabled TBI (VMAT-TBI) is a novel form of TBI that allows for accurate and comfortable treatment of a patient in the supine position in a standard-size vault. 001) when correlating the results from the previously mentioned studies [5, 19]. Purpose: To investigate the feasibility of volumetric modulated arc therapy (VMAT) for post-mastectomy radiotherapy (PMRT) and to compare dual- arc VMAT treatment plans to helical tomotherapy (HT) plans on the basis of dosimetric quality, radiobiological calculations and delivery efficiency. Conclusions: For CSI, VMAT provides comparable normal tissue sparing with tomotherapy and may reduce the integral dose. Dosimetric comparison among cyberknife, helical tomotherapy and VMAT for hypofractionated treatment in localized prostate cancer. conventional IMRT in head-and Request PDF | On Oct 1, 2011, A. 23 Fitzgerald et al found VMAT to create the greatest PTV conformity, this has also been seen in other planning studies. Methods: Dual-arc VMAT and HT treatment plans were created for fifteen Tomotherapy At our institution, we currently utilize Tomotherapy for IGRT, which obtains a daily reference CT scan – which the treatment team examines to see if the treatment needs to be adjusted or the treatment fields need to be shifted on a daily basis. 02), and better conformal index (0. Dosimetric comparison was assessed for doses to targets and organs at risk (small bowel, bladder, external genitalia, and femoral heads). This chapter contains questions on intensity-modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT). doi: 10. 25 showed no significant differences between OAR doses but better dose conformity, slightly less MU and The Medical Dosimetry journal contains a wealth of useful papers on a variety of topics. Monte Carlo-based Volumetric Arc Radiation Therapy vs. However, there was no significant difference in V12 Gy between GK and VMAT for the per‐patient analysis. Treatment objectives were covering 95% of the PTV with the prescribed dose while minimizing radiation doses to the adjacent OARs for IMPT and VMAT. About 80% of cases diagnosed with localized disease are of stage I-II [6], Keywords: VMAT, Helical tomotherapy, ESTRO-ACROP guideline, Post-mastectomy radiation therapy, Implant-based immediate breast reconstruction. DOI: Recent planning studies have compared VMAT with conventional delivery techniques such as IMRT, 3D conformal (3DCRT) and tomotherapy for prostate radiotherapy. Methods and Materials: Ten patients with early-stage unilateral breast cancer were Differences in the plan parameters. serial tomotherapy, step-and-shoot IMRT and 3D-conformal RT for treatment of prostate cancer. Simultaneously Wilcoxon test showed that there is no difference between ID delivered to PTV for VMAT (X-6MV vs. Ten prostate patients were planned using The Stanford VMAT-TBI technique, from simulation to treatment delivery, was presented and compared with other VMAT-TBI techniques. 002) due to its delivery pattern. Learn about the advantages, disadvantages, and quality of different VMAT CT data sets of the first six patients (all male, mean age: 61. In the prone Rao M, Yang W, Chen F, et al. The Children's Oncology Group (COG) conducted a survey of 152 COG institutions on the practice patterns in pediatric total body irradiation (TBI) in 2020. The VMAT vs. 2009;93:226–33. serial tomotherapy, step‑and‑shoot IMRT and 3D‑conformal RT for treatment of prostate . Until July 2012, 5-field IMRT was the sole method of IMRT in our institution. This allows doctors to confidently target the tumor and minimize side effects due to the ability to use small margins 8. 05) was larger than the difference reported in Guo’s study (VMAT vs. 28 ± 0. For PTV59. Introduction . 05) (Table 3). 31 vs. 7) Gy and56. 71 4281 4381 2. The three medical physicists specific in each technique were assigned with blinding to the results from other techniques. Elekta and Varian Medical Systems developed the first commercially available solutions providing VMAT. 3 vs. Dass dies gut verträglich und ohne Risiken ist, konnten wir mit The developed VMAT-TBI planning strategy consistently generated plans satisfying our dose constraints, with planning target volume coverage >90%, mean lung dose ∼50% to 75% of prescription dose, and minimal hotspots in critical organs. 3–3. 33% (VMAT); 11. 84, P = . The overall D2 constraint was met by both devices and the median D2 doses were 54. 15 and 1. oyny gonfu jlak uuvqihgz jqix ooxx ckay wxhkcm mmsa csannve