This is elekta for almost five decades, elekta has been a leader in precision radiation medicine. Elekta versa hde machine elekta, stockholm, sweden was used for both ebt and vmat beams. Vmat and ht plans were delivered using elekta s precisebeam vmat linac control system elekta ab, stockholm, sweden and a tomotherapy hi. Welloptimized treatment planning parameters are vital for optimum beam delivery in advanced radiotherapy techniques. The dose coverage in the target volumes was better for all vmat techniques. Versa hd will enable even more conformal treatments that should significantly limit normal tissue exposure and decrease side effects. The newest release of the eclipse varian treatment planning system tps includes an optimizing engine for elekta volumetricmodulated arc therapy vmat planning.
Elekta synergy linear accelerator with vmat technology. The qa beamchecker plus allows for fast, reliable, and. Our nearly 4,000 employees worldwide are committed to ensuring everyone in the world with cancer has access to and benefits from more precise, personalized radiotherapy treatments. Research paper comparison of treatment plan quality of vmat. Does gated beam delivery impact delivery accuracy on an. Elekta assurance new levels of automation and integration for advanced qa. We are currently in the process of commissioning imrt\vmat for clinical use on a new elekta synergy. Feb 04, 20 the finnish house from double boards in 5 days diy.
Optimization methods for volumetric modulated arc therapy and. The purpose of this study was to assess dosimetric validation of the new vmat optimization algorithm implemented in the treatment. Optimization methods for volumetric modulated arc therapy and radiation therapy under uncertainty by fei peng a dissertation submitted in partial ful llment of the requirements for the degree of doctor of philosophy industrial and operations engineering in the university of michigan 20 doctoral committee. Vmat planning for elekta linear accelerators is supported with the following commercial and clinical routine treatment planning systems. An extensive report by kaurin et al reported on tests for all parameters of vmat on elekta linac 48. The johns hopkins hospital baltimore, maryland has acquired elektas versa hd linear accelerator. Vmat treatment plans presents a challenge since the gantry rotation and collimator leaves must be repeatedly stopped and set into motion during each breathing cycle. In this study, we present the commissioning process for an anzai gating system az733vi on an elekta versa hd linear accelerator and make recommenda. Volumetric modulated arc therapy vmat is a novel radiation technique, which can achieve highly conformal dose distributions with improved target volume coverage and sparing of normal tissues compared with conventional radiotherapy techniques. The geometrical approach to treatment volumes employed a 360 singlearc or dualarc approach after. We can deliver these stateoftheart techniques with versa hd and do it in such a way that it not only manages the cancer, but also minimizes the impact of treatment on the patients quality of life.
The software supports the ability for the mlci2 leaves to interdigitate, supporting the creation of island fields for xray treatment delivery techniques. The vmat treatment plans were verified using elektas precise beam infinity control system which was installed in our clinic in february 2008. Pbt was delivered using mevion s250e mevion medical systems, littleton, ma with a ctv target range and modulation was 2. As a result, elekta developed rotational imrt, a delivery technique known as volumetric. The main highlights of their study were the mlc positional tests including picket fence test. Being a former varian user and new to elekta machines i was wondering if i could pick the brains of any elekta\pinnacle users out there. Aug 04, 2019 vmat planning for elekta linear accelerators is supported with the following commercial and clinical routine treatment planning systems. As shown in the upper part of figure 1, to perform crossvalidation of the log filebased dose using an ionization chamberarccheck3dvh dose, an error free log file was obtained during optimized plan irradiation. This new technology delivers targeted radiation, with the help of highly sophisticated software, like missile from a computerized satellite. Data from high dose rate and flattening filter free capable machines such as the varian truebeam and elekta versa hd are also seamlessly acquired. Investigation of vmat algorithms and dosimetry pdf purpose. Forty vmat plans elaborated by tps elekta monaco 5.
Purpose of study is to evaluate the end to end commissioning accuracy of intensity modulated radiation therapy imrt and volumetric modulated arc therapy vmat for versa hd linear accelerator using aapm tg119 protocol. Evaluation of the elekta synergy concept for patient. With consistent templates, planning vmat imrt is much easier. Elekta xvi volumetric imaging and registration qa with the. The purpose of this study was to evaluate this new algorithm and to compare it to intensitymodulated.
Jul 27, 2019 vmat planning for elekta linear accelerators is supported with the following commercial and clinical routine treatment planning systems. Linacbased stereotactic radiosurgery or fractionated stereotactic radiotherapy srsfsrt of multiple brain lesions using volumetric modulated arc therapy vmat is typically performed by a multipleisocenter approach, i. Optimal vmat delivery for elekta mlc beam modulator. Pdf vmat testing for an elekta accelerator researchgate. Volumetric modulated arc therapy vmat in the combined. All vmat and dcat plans were accurately delivered on a static imrt qa phantom and had excellent gamma index passing rates, with 95 percent of evaluated points within the gamma index criteria. A treatment planning study comparing elekta vmat and fixed field. Effects of flattening filterfree and volumetricmodulated arc. We are healthcare technology innovators, specializing in radiotherapy treatments for cancer and brain disorders. Comparisons were made between the delivery efficiency of vmat and fixedfield imrt. The first site in the world to have both elekta axesse and elekta. One of the commercial solutions for arc radiotherapy is elekta vmat. Comparison of elekta vmat with helical tomotherapy and.
To compute vmat, elekta monaco was used as the treatmentplanning system v. Elekta xvi volumetric imaging and registration qa with the mimi phantom kurt stump, ph. Volumetric modulated arc therapy for prostate cancer pdf. Patientspecific quality assurance using monte carlo dose. Their tests, while helpful for elekta customers by investigating.
The advantages of using multiple arcs and noncoplanar beams are now being more fully explored. Physical aspects of volumetric modulated arc therapy vmat. Full responsibility of the clinical use of shared templates resides with. Elekta care is designed to help you maximize the use of your elekta technology, so you can focus on your patients and your practice. Using an elekta synergy linac elekta ab, stockholm, sweden in. Elekta provides vmat and radiosurgery solutions for new jersey health system centrastate medical center freehold, new jersey has purchased two new stateoftheart elekta radiation therapy treatment systems, both with volumetric modulated arc therapy vmat. Unique to these sources is the synchronization between the motion in the dosxyznrc geometry and the motion within the linac head, represented by a shared library either a beamnrc accelerator with dynamic component modules, or an external library. Treatment plan quality assurance qa for vmat was performed using the iba matrixx system while an ion chamber and films were used for ht.
The vmat and stepandshoot imrt plans provided similar target coverage and similar sparing of organs at risk. Elekta ab, stockholm, sweden to delineate the target. Jul 10, 2014 the newest release of the eclipse varian treatment planning system tps includes an optimizing engine for elekta volumetricmodulated arc therapy vmat planning. New system sets benchmark in radiation oncology versatility and capabilities. I want to create some simple dmlc sliding window test fields. Elekta vmat allows treatment times to be reduced significantly compared to conventional delivery and helical tomotherapy. The impact of continuouslyvariable dose rate vmat on beam. Houston, april 18 the university of texas md anderson cancer centerhas purchased two elekta versa hd. Materials and methods patients the data of twenty eight esophageal carcinoma patients who underwent vmat technique under versahd unit elekta ab, stockholm, sweden were randomized selected from our database and fully anonymized for the purpose of this study. Comparison of templatebased elekta vmat plans with imrt plans generated by the varian planning system eclipse. Quality assurance is a vital part of any radiotherapy service. Providing evidence for radiotherapy rtinduced effects on cardiac implantable electric devices cieds with focus on flattening filter free volumetric modulated arc therapy fffvmat at 6 and 10 mv as well as 3dconformal radiotherapy 3dcrt at 18 mv. Nov 01, 2009 read initial experience of elekta vmat for prostate treatment at juntendo university, international journal of radiation oncology biology physics on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Initial work on vmat has largely focused on single arc coplanar delivery. In this study, elekta log files were recorded at 0. Evaluation of the elekta synergy concept for patient positioning in image guided radiotherapy johan renstrom supervisor. Evaluation of elekta symmetrytm 4d igrt system by using. A treatment planning study comparing elekta vmat and fixed. Rapidarc tm, elekta vmat, tomotherapy and cyberknife. Dec 25, 2019 vmat planning for elekta linear accelerators is supported with the following commercial and clinical routine treatment planning systems. Elekta provides vmat and radiosurgery solutions for new. The elekta beammodulator bm is a highresolution multileaf collimation system where each individual leaf is 4 mm wide at the isocentre, without backup diaphragms and jaws. Per nilsson, phd and tommy knoos, phd medical radiation physics clinical sciences, lund lund university, 2005. An experimental evaluation of the agility mlc for motion. Volumetric modulated arc therapy vmat is a specific type of intensitymodulated radiation therapy imrt in which the gantry speed, multileaf collimator mlc leaf position, and dose rate vary. Monaco with vmat, elekta integrity, and elekta mlci2 a.
The finnish house from double boards in 5 days diy. With current technology, vmat can provide similar plan quality as current tomotherapy. However, the sparing of the implants and the total body dose were significantly reduced in comparison to the imrt plans implant. The purpose of this study was to evaluate this new algorithm and to compare it to intensitymodulated radiation therapy imrt for various disease sites by creating single and doublearc vmat plans. As treatment technology and complexity have developed, so has the burden of qa in terms of both time and cost. Dosimetric evaluation of vmat planning for elekta agility. Vmat planning for elekta linear accelerators is supported with the. Here, we present our initial experience with a new.
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