From october 2010 to december 20, consecutive 67 lung cancer patients received singlearc vmat sbrt using an elekta synergy system. Check out our inventory of high quality, cost effective linacs today. Per nilsson, phd and tommy knoos, phd medical radiation physics clinical sciences, lund lund university, 2005. The purpose of this study was to assess dosimetric validation of the new vmat optimization algorithm implemented in the treatment. Optimal vmat delivery for elekta mlc beam modulator. With consistent templates, planning vmat imrt is much easier. Comparison of elekta vmat with helical tomotherapy and fixed field imrt. Searching standard parameters for volumetric modulated arc. Elekta care is designed to help you maximize the use of your elekta technology, so you can focus on your patients and your practice.
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. Jul 11, 2012 since december 2009 a new vmat planning system tool is available in oncentra masterplan v3. Evaluation of the elekta synergy concept for patient positioning in image guided radiotherapy johan renstrom supervisor. Push the boundaries of your stereotactic capabilities. A treatment planning study comparing elekta vmat and fixed. Research open access a treatment planning study comparing. 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. Elekta linear accelerator comparison chart radiology. 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. 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. 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. From october 2010 to december 20, consecutive 67 lung cancer patients received singlearc vmatsbrt using an elektasynergy system.
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. The advantages of using multiple arcs and noncoplanar beams are now being more fully explored. Elekta vmat, elekta s advanced arc therapy technique, establishes new standards for radiation therapy treatment speed and dose reduction to the patient. Elekta vmat allows treatment times to be reduced significantly compared to conventional delivery and helical tomotherapy. Evaluation of elekta vmat for stereotactic body radiotherapy sbrt. Elekta unity is a stateofthe art mrlinac that is setting a new standard for personalized radiation therapy. The elekta beammodulator bm is a highresolution multileaf collimation system where each individual leaf is 4 mm wide. With elekta vmat, single or multiple radiation beams sweep in uninterrupted arcs around the patient, dramatically speeding treatment delivery. 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. Patientspecific quality assurance using monte carlo dose. Comparisons were made between the delivery efficiency of vmat and fixedfield imrt. Dynamic arc modulation is optimized with amoa arcmodulationoptimizationalgorithm. Evaluation of the elekta agility mlc performance using high. Eight patents with stage iii nnktl treated with imrt were replanned for ht, vmat two full arcs.
Use our elekta linear accelerator comparison chart to find the best medical equipment for your facility. 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. In imrt treatment planning, inverseplanned solutions are commonplace. Vmat comprises simultaneous variation of gantry position and speed, leaf and jawpositions, collimator angle and dose rate. 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.
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. 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. Linacbased vmat radiosurgery for multiple brain lesions. 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. 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. Jan 31, 2019 plans were delivered using elektas icomcat software and recorded log files were extracted. For many cases a singlearc vmat plan may be sufficient to achieve the desired dose distribution. Volumetric modulated arc therapy for lung stereotactic. 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.
Dosimetric evaluation of vmat planning for elekta agility. Elekta strengthens presence in mexico with government tender for radiation therapy technology elekta further invests in mexico with new offices and fortified workforce. Background unity elekta is a unique magnetic resonance mrlinac that conjugates a 1. Elekta to highlight high definition dynamic radiosurgery with versa hd and monaco at aapm annual meeting. Volumetric modulated arc therapy for prostate cancer pdf. As treatment technology and complexity have developed, so has the burden of qa in terms of both time and cost. Elekta strengthens presence in mexico with government tender. For ten patients with localized prostate cancer plans for simultaneous integrated boost were optimized, varying systematically the number of arcs, collimator angle, the. For complex anatomical sites a multiplearc vmat plan can deliver superior target coverage while sparing healthy tissue and adjacent. The elekta synergy platform also features sophisticated ultraconformal field shaping with a fully integrated mlc, 40x40 cm fieldsize, iviewgt epid, mosaiq information.
An extensive report by kaurin et al reported on tests for all parameters of vmat on elekta linac 48. Evaluation of elekta vmat for stereotactic body radiotherapy. 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. The elekta agility mlc system was shown to be capable of obtaining speeds within the range of 535 mms. Comparison of elekta vmat with helical tomotherapy and fixed. The main highlights of their study were the mlc positional tests including picket fence test. Pdf quality assurance of volumetric modulated arc therapy. 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. Elekta xvi volumetric imaging and registration qa with the mimi phantom kurt stump, ph. Commissioning of volumetric modulated arc therapy vmat in a. 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. Elekta infinity offers you a choice use a single arc or choose multiple arcs to optimize the vmat plan. Initial work on vmat has largely focused on single arc coplanar delivery. Jul 27, 2019 vmat planning for elekta linear accelerators is supported with the following commercial and clinical routine treatment planning systems.
Forty vmat plans elaborated by tps elekta monaco 5. 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. The purpose of this study was to work out standard parameters for the optimization of prostate cancer. Hypofractionated radiation therapy demands the highest levels of accuracy and precision. A vmat planning solution for prostate patients using a. We are healthcare technology innovators, specializing in radiotherapy treatments for cancer and brain disorders. 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. Updated guidance relating to the use of elekta products and solutions is posted on the community at regular intervals. 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. 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. Full responsibility of the clinical use of shared templates resides with. 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. Plans were delivered using elektas icomcat software and recorded log files were extracted.
Evaluation of the elekta synergy concept for patient. Treatment planning for volumetric modulated arc therapy vmat. Quality assurance of volumetric modulated arc therapy using elekta synergy article pdf available in acta oncologica stockholm, sweden 488. The newest release of the eclipse varian treatment planning system tps includes an optimizing engine for elekta volumetricmodulated arc therapy vmat planning. Elekta synergy platform linear accelerator radiology. Dosimetric comparison of helical tomotherapy, vmat, fixed. Welloptimized treatment planning parameters are vital for optimum beam delivery in advanced radiotherapy techniques. Eight patents with stage iii nnktl treated with imrt were replanned for ht. In this study, elekta log files were recorded at 0. The vmat treatment plans were verified using elektas precise beam infinity control system which was installed in our clinic in february 2008.
Treatment plan quality assurance qa for vmat was performed using the iba matrixx system while an ion chamber and films were used for ht. Elekta to highlight high definition dynamic radiosurgery with. Commissioning an elekta versa hd linear accelerator. 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. With current technology, vmat can provide similar plan quality as current tomotherapy. Elekta assurance new levels of automation and integration for advanced qa. The vmat and stepandshoot imrt plans provided similar target coverage and similar sparing of organs at risk. Elekta xvi volumetric imaging and registration qa with the. Volumetric modulated arc therapy vmat is an advancement of intensity modulated radiation therapy imrt which allows irradiation with simultaneously varying.
Monte carlo dose verification of vmat treatment plans using. Vmat and ht plans were delivered using elektas precisebeam vmat linac control system elekta ab, stockholm, sweden and a tomotherapy hi. All patients were treated with an abdominal compressor. Quality assurance is a vital part of any radiotherapy service. Log files were reformatted for readability and automatically analyzed in matlab. 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. For ten patients with localized prostate cancer plans for simultaneous integrated boost were optimized, varying systematically the number of arcs, collimator angle, the maximum.
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