Hypofractionated radiation therapy demands the highest levels of accuracy and precision. The newest release of the eclipse varian treatment planning system tps includes an optimizing engine for elekta volumetricmodulated arc therapy vmat planning. With current technology, vmat can provide similar plan quality as current tomotherapy. 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.
Vmat comprises simultaneous variation of gantry position and speed, leaf and jawpositions, collimator angle and dose rate. Elekta to highlight high definition dynamic radiosurgery with versa hd and monaco at aapm annual meeting. The vmat and stepandshoot imrt plans provided similar target coverage and similar sparing of organs at risk. In imrt treatment planning, inverseplanned solutions are commonplace. For complex anatomical sites a multiplearc vmat plan can deliver superior target coverage while sparing healthy tissue and adjacent. Elekta unity provides the ability to reshape the dose based on daily changes in shape, size and position of the tumor and surrounding healthy anatomy and then enables accurate dose delivery with realtime visualization of the tumor. Comparison with helical tomotherapy ht, brainlab dynamic conformal arc therapy dcat, and fixed field therapy. 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. Elekta synergy platform linear accelerator radiology.
Jul 11, 2012 since december 2009 a new vmat planning system tool is available in oncentra masterplan v3. Elekta vmat allows treatment times to be reduced significantly compared to conventional delivery and helical tomotherapy. The vmat technique has become clinically and commercially available for bothvarian varian medical systems, palo alto, ca, usa and elekta elekta ab, stockholm, sweden linear accelerators. The aim of this study was to report the outcome of primary or metastatic lung cancer patients undergoing volumetric modulated arc therapy for stereotactic body radiation therapy vmatsbrt. Elekta xvi volumetric imaging and registration qa with the mimi phantom kurt stump, ph. Volumetric modulated arc therapy vmat is an advancement of intensity modulated radiation therapy imrt which allows irradiation with simultaneously varying dose rate, gantry speed, collimator, and leaf positions. The elekta vmat solution elekta ltd, crawley, uk which is considered in this note has been successfully commissioned by this centre and has been found by others to be a robust method for delivering conformal radiotherapy bedford and warrington 2009.
Comparison of elekta vmat with helical tomotherapy and fixed field imrt. Treatment planning for volumetric modulated arc therapy vmat. 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. Evaluation of elekta vmat for stereotactic body radiotherapy. For ten patients with localized prostate cancer plans for simultaneous integrated boost were optimized, varying systematically the number of arcs, collimator angle, the. Evaluation of the elekta synergy concept for patient.
Evaluation of the elekta synergy concept for patient positioning in image guided radiotherapy johan renstrom supervisor. The aim of this study was to compare radiotherapy plans for stage iii nasal natural killertcell lymphoma nnktl using helical tomotherapy ht, volumetricmodulated arc therapy vmat, fixedfield intensitymodulated radiotherapy imrt, and threedimensional conformal radiotherapy 3dcrt. The speed of vmat delivery allows you to offer the excellent conformity and dose distribution to a larger proportion of your patients, without compromising the efficiency of the clinic. 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 continuously during delivery. For many cases a singlearc vmat plan may be sufficient to achieve the desired dose distribution. 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. In this study, elekta log files were recorded at 0. Per nilsson, phd and tommy knoos, phd medical radiation physics clinical sciences, lund lund university, 2005. As treatment technology and complexity have developed, so has the burden of qa in terms of both time and cost. Comparisons were made between the delivery efficiency of vmat and fixedfield imrt. Vmat planning for elekta linear accelerators is supported with the following commercial and clinical routine treatment planning systems. Elekta strengthens presence in mexico with government tender for radiation therapy technology elekta further invests in mexico with new offices and fortified workforce. From october 2010 to december 20, consecutive 67 lung cancer patients received singlearc vmatsbrt using an elektasynergy system. An extensive report by kaurin et al reported on tests for all parameters of vmat on elekta linac 48.
Dosimetry for elekta vmat verify the dose delivery without compromises in 3d the elekta vmat treatment technique is a very sophisticated treatment technique wherein it is insufficient to make dose verification at only one point, profile, or in a single plane. Check out our inventory of high quality, cost effective linacs today. Evaluation of the elekta agility mlc performance using high. Elekta to highlight high definition dynamic radiosurgery with. As shown in the upper part of figure 1, to perform crossvalidation of the log filebased dose using an ionization chamberarccheck3dvh dose, an errorfree log file was obtained during optimized plan irradiation. Use our elekta linear accelerator comparison chart to find the best medical equipment for your facility. The elekta synergy platform also features sophisticated ultraconformal field shaping with a fully integrated mlc, 40x40 cm fieldsize, iviewgt epid, mosaiq information.
Evaluation of elekta vmat for stereotactic body radiotherapy sbrt. Monte carlo dose verification of vmat treatment plans using. 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. 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. With elekta vmat, single or multiple radiation beams sweep in uninterrupted arcs around the patient, dramatically speeding treatment delivery. From october 2010 to december 20, consecutive 67 lung cancer patients received singlearc vmat sbrt using an elekta synergy system. 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. Background unity elekta is a unique magnetic resonance mrlinac that conjugates a 1. Commissioning an elekta versa hd linear accelerator. Dynamic arc modulation is optimized with amoa arcmodulationoptimizationalgorithm. Elekta care is designed to help you maximize the use of your elekta technology, so you can focus on your patients and your practice.
Optimal vmat delivery for elekta mlc beam modulator. The advantages of using multiple arcs and noncoplanar beams are now being more fully explored. Elekta infinity offers you a choice use a single arc or choose multiple arcs to optimize the vmat plan. Elekta care community the online elekta care community portal is available at all times for easy and personalized access to your support and learning resources. Updated guidance relating to the use of elekta products and solutions is posted on the community at regular intervals. Volumetric modulated arc therapy vmat is an advancement of intensity modulated radiation therapy imrt which allows irradiation with simultaneously varying.
Elekta vmat, elekta s advanced arc therapy technique, establishes new standards for radiation therapy treatment speed and dose reduction to the patient. Vmat and ht plans were delivered using elektas precisebeam vmat linac control system elekta ab, stockholm, sweden and a tomotherapy hi. Full responsibility of the clinical use of shared templates resides with. Elekta global websites with a presence in numerous countries throughout the world, elekta is connecting our global partners to valuable resources, helpful information and exciting innovations for better patient care and treatment. Eight patents with stage iii nnktl treated with imrt were replanned for ht. A vmat computer model has been generated to model the delivery of a vmat plan on elekta linear accelerators, and this has been applied to answer questions regarding dmlc tracking with the current elekta control systems. Patientspecific quality assurance using monte carlo dose.
A vmat planning solution for prostate patients using a. Treatment plan quality assurance qa for vmat was performed using the iba matrixx system while an ion chamber and films were used for ht. Eight patents with stage iii nnktl treated with imrt were replanned for ht, vmat two full arcs. 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. Research open access a treatment planning study comparing. In this study, we verified volumetric modulated arc therapy vmat plans in an elekta synergy system with an integrated agility 160leaf multileaf collimator mlc by comparing them with monte carlo mccalculated dose distributions using the aapm tg119 structure sets. Commissioning of volumetric modulated arc therapy vmat in a. With consistent templates, planning vmat imrt is much easier. We are healthcare technology innovators, specializing in radiotherapy treatments for cancer and brain disorders. Jul 27, 2019 vmat planning for elekta linear accelerators is supported with the following commercial and clinical routine treatment planning systems. Full responsibility of the clinical use of shared templates resides with the healthcare professional providing patient care services. Initial work on vmat has largely focused on single arc coplanar delivery.
The purpose of this study was to work out standard parameters for the optimization of prostate cancer. To develop a fast replanning algorithm based on segment aperture morphing sam for online replanning of volumetric modulated arc therapy vmat with flattening filter free fff beams. Pdf quality assurance of volumetric modulated arc therapy. For ten patients with localized prostate cancer plans for simultaneous integrated boost were optimized, varying systematically the number of arcs, collimator angle, the maximum. Elekta xvi volumetric imaging and registration qa with the. Volumetric modulated arc therapy for lung stereotactic. Quality assurance is a vital part of any radiotherapy service. Elekta unity is a stateofthe art mrlinac that is setting a new standard for personalized radiation therapy. Log files were reformatted for readability and automatically analyzed in matlab. Welloptimized treatment planning parameters are vital for optimum beam delivery in advanced radiotherapy techniques. Elekta linear accelerator comparison chart radiology.
The delta 4 pre treatmentphantom uniquely offers a fast and accurate verification of complex radiotherapy treatment modalities delta4 is a cylindrically shaped pmma phantom, surrounding two crossing orthogonal planes with a total of 1069 psi diodes, very small in dimensions and spaced with high resolution. All patients were treated with an abdominal compressor. Elekta strengthens presence in mexico with government tender. Plans were delivered using elektas icomcat software and recorded log files were extracted. Searching standard parameters for volumetric modulated arc.
Push the boundaries of your stereotactic capabilities. Dosimetric evaluation of vmat planning for elekta agility. Comparison of elekta vmat with helical tomotherapy and fixed. Forty vmat plans elaborated by tps elekta monaco 5. The versa hd not only brought kv image guided radiotherapy to our department, it also enabled the department to offer vmat and high doserate fff treatments. The elekta agility mlc system was shown to be capable of obtaining speeds within the range of 535 mms. The purpose of this study was to assess dosimetric validation of the new vmat optimization algorithm implemented in the treatment. Nov 11, 2014 the aim of this study was to report the outcome of primary or metastatic lung cancer patients undergoing volumetric modulated arc therapy for stereotactic body radiation therapy vmat sbrt. Dosimetric comparison of helical tomotherapy, vmat, fixed. Jan 31, 2019 plans were delivered using elektas icomcat software and recorded log files were extracted. Linacbased vmat radiosurgery for multiple brain lesions. The elekta beammodulator bm is a highresolution multileaf collimation system where each individual leaf is 4 mm wide. Volumetric modulated arc therapy for prostate cancer pdf. The vmat treatment plans were verified using elektas precise beam infinity control system which was installed in our clinic in february 2008.
The main highlights of their study were the mlc positional tests including picket fence test. A treatment planning study comparing elekta vmat and fixed. Quality assurance of volumetric modulated arc therapy using elekta synergy article pdf available in acta oncologica stockholm, sweden 488. Elekta synergy platform is designed to enable straightforward integration of the key imaging technologies that will transform an advanced linear accelerator into an igrt system.
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