Dosimetric comparisons of craniospinal axis irradiation using. An elekta synergy linac was used in the treatment planning system oncentra and for the measurements. It does this by offering the freedom to simultaneously vary a number of parameters during treatment delivery without having to compromise your treatment plan or delivery. Evaluation of the elekta synergy concept for patient. A dosimetric comparison manoj kumar sharma 1, swarupa mitra 1, upasna saxena 1, manindra bhushan 2, himanshu shrivastava 1, david k simson 1, abhinav dewan 1, deepika chauhan 1. Poppe carlvonossietzky university, 26129 oldenburg, germany w. Elekta infinity with vmat gives you the flexibility to dynamically control multiple treatment parameters while the beam is on and rotating. Treatment times were decreased by up to minutes or 59 percent.
For this purpose the matlab program was simply used as a dicom editor. Volumetric modulated arc therapy for treatment of solid tumors. Vmat planning for elekta linear accelerators is supported with the following commercial and clinical routine treatment planning systems. Vmat quality control implementation for an elekta beam. Elekta infinity with vmat requires significantly fewer mus than conventional techniques, reducing total mu delivery by up to 50%. Elekta infinity achieves helicallike target coverage with better sparing of surrounding healthy tissue. Cone beam computed tomography data acquisition during vmat.
Compared to imrt, single and doublearc vmat plans showed comparable. Clinical utility of rapidarctm radiotherapy technology. In this way, it provides highly personalized patient treatment and opens up new treatment opportunities. Vmat quality control implementation for an elekta beam modulator accelerator, with artiscan software. Elekta xray volumetric imaging xvi enables you to routinely confirm size, shape and position of the target volume compared to plan, as well as the position of critical adjacent structures. Evaluation of elekta symmetrytm 4d igrt system by using. However, the maximum spine dose was clearly lower for all vmat techniques up to implementing imrt in clinical practice.
Clinical study monte carlobased dose calculation in. Elekta xvi volumetric imaging and registration qa with the. Click the shape tool to add rectangular or ellipsis shapes to a pdf page. Vmat planning for elekta linear accelerators is supported with the. The plan quality was evaluated regarding homogeneity, conformity, delivery. Currently there are several vmat systems available under various names rapidarc, varian. Comparison of elekta vmat with helical tomotherapy and. The accelerator used for the fff vmat linac was a 6mv fff elekta axesse sweden photon beam and was used in conjunction with a 5 mm wide elekta agility highspeed mlc. 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 tps users meeting 2012 marius treutwein department of radiation oncology, regensburg university medical center franzjosefstraussallee 11, d 93053 regensburg, germany marius. The study is to investigate a hybrid imrtvmat technique which combines intensity modulated radiation therapy imrt and volumetric modulated arc therapy vmat for the treatment of nonsmall cell lung cancer nsclc.
Vmat parameters are tested in any direction using mlc leaf pattern files. The drummond group llc, an authorized certification body acb empowered to test software for compliance based on requirements of the federal. Keiichi nakagawa, akihiro haga, katsutake sasaki, satoshi kida, yoshitaka masutani, hideomi yamashita, wataru takahashi, hiroshi igaki, akira sakumi, kuni ohtomo, kiyoshi yoda, lung tumor motion reproducibility for five patients who received fourfraction vmat stereotactic ablative body radiotherapy under constrained breathing conditions. Rapidarctm is a radiation technique that delivers highly conformal dose distributions through the complete rotation 360 and speed variation of the linear accelerator gantry. Volumetric modulated arc therapy vmat is known for its ability to.
Eleven patients with pituitary adenoma were included. Heilemanna oregon health and science university, portland, oregon 97239 and carlvonossietzky university, 26129 oldenburg, germany b. As treatment technology and complexity have developed, so has the burden of qa in terms of both time and cost. Ten patients with early tstage npc who received tomotherapy using simultaneously integrated boost sib strategies were replanned with vmat rapidarc of varian, dualarc. Eclipse treatment planning system feature sheet the rich functionality and ef. While this is a necessary component for commissioning a system, we thought this to be inadequate for catching errors that would be noticed by measuring individual components. 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. Oct 11, 2015 in combining vmat and imrt beams, hybrid imrt vmat significantly improved both the target dose conformity and the homogeneity compared with imrt and vmat for nonsmall cell lung cancer. With the market leading isocentric clearance of 45cm, elekta synergy provides significantly more freedom to deliver noncoplanar therapies. As it is difficult to reduce the heart dose with traditional anteroposteriorposteroanterior field whole lung irradiation for pulmonary metastasis, improved radiation techniques are highly desirable. This model uses the high accuracy provided by the monte carlo mc simulation of log files and allows the experimental feedback from the high spatial resolution of films hosted in.
Ability to recall, edit and retain existing dose and plan integrity. Tomotherapy and volumetric modulated arc therapy vmat have emerged as two popular types of intensity modulated radiation therapy imrt for the treatment of complex tumors. Complete varian and elekta imrt and vmat logfile analysis workflow automation single click deployment results now includes stereotactic collimator rotation ct imaging qa using cone beam or diagnostic images obtained with any of the catphan phantoms 503, 504, 600, pipspro automatically finds analysis. Jul 11, 2012 since december 2009 a new vmat planning system tool is available in oncentra masterplan v3. Elekta vmat, elektas advanced arc therapy technique, establishes new standards for radiation therapy treatment speed and dose reduction to the patient. For example, a picket fence mlc test will catch 1 to 2 mm errors that will not be seen in. Pdf searching standard parameters for volumetric modulated arc. Is volumetric modulated arc therapy rapidarc better than. Elekta vmat allows treatment times to be reduced significantly compared to conventional delivery and helical tomotherapy. Dosimetric comparison between the intensity modulated. Elektas new mlc solution poised to revolutionize beam. The monaco treatment planning system combines monte carlo dose calculation accuracy with robust optimization tools to provide highquality radiotherapy treatment plans for threedimensional conformal radiotherapy 3d crt, intensity modulated radiotherapy imrt, volumetric modulated arc therapy vmat, stereotactic radiosurgery srs, and stereotactic body radiotherapy sbrt. After contouring the virtual target, 1 arc vmat plan was performed from monaco version 3.
Elekta infinity can optimize the accuracy and speed of. Jan 01, 2011 keiichi nakagawa, satoshi kida, akihiro haga, yoshitaka masutani, hideomi yamashita, toshikazu imae, kenichiro tanaka, kuni ohtomo, yoshio iwai, kiyoshi yoda, cone beam computed tomography data acquisition during vmat delivery with subsequent respiratory phase sorting based on projection image crosscorrelation, journal of radiation research, volume 52, issue 1, january 2011, pages 1121. Elekta xvi volumetric imaging and registration qa with the mimi phantom kurt stump, ph. Language editing for authors scientific editing for authors. Elekta stockholm, sweden and philips amsterdam, the. Vmat linear accelerator commissioning and quality assurance aapm. An imrtvmat technique for nonsmall cell lung cancer. Elekta vmat allows target dose delivery to be optimized to each individual patients needs and their pathology. Elekta assurance new levels of automation and integration for advanced qa. For the first time, you can tailor treatment plans to optimize the dose around a tumor. Comparison of elekta vmat with helical tomotherapy and fixed field imrt. The purpose of this study was to work out standard parameters for the optimization of prostate cancer.
Treatment plan quality assurance qa for vmat was performed using the iba matrixx system while an ion chamber and films were used for ht. Monaco is a comprehensive treatment planning solution for 3d, imrt, vmat and stereotactic techniques that uses the goldstandard monte. In vmat treatment delivery the ability of the linear accelerator linac to. Volumeview imaging also delivers high precision localization at ultralow doses, allowing you to confidently image every day without fear of unnecessary risk to patients. Is volumetric modulated arc therapy rapidarc better than intensity modulated radiotherapy for gynecological malignancies. T epid is the most common method but as technology advance new methods arise. Full text volumetric modulated arc therapy for treatment of. The increased fraction time is true with cyberknife, where prostate treatments typically take up to 45 min per fraction.
A comparative study of identical vmat about two adjacent targets. Pdf on nov 20, 2014, prabhu r and others published vmat commissioning and qa of elekta infinity digital linear accelerator with agility mlc find, read and cite all the research you need on. An introduction to the intensitymodulated radiation therapy imrt. Then, the movement of the phantom was verified by using xvi symmetrytm system. Pdf vmat commissioning and qa of elekta infinity digital. Vmat, formally known as intensity modulated arc therapy. Systems that report only maximum and mean leaf speed cannot be used to calculate leaf speed loss, as required by tg142, notes standard. The following parameters were used for the tomotherapy system accuray, usa. Quality assurance is a vital part of any radiotherapy service. The influence of radiotherapy techniques on the plan quality.
Elekta vmat enhanced dose conformance for patientspecific. A treatment planning study comparing elekta vmat and fixed field imrt using the varian treatment planning system eclipse. Lung tumor motion reproducibility for five patients who. Implanted fiducial markers are no longer needed for prostate. Volumetric modulated arc therapy for treatment of solid tumors ncbi. Elekta vmat elekta ab, stockholm, sweden and phillips smartarc phillips. Does the option to rotate the elekta beam modulator mlc. The main purpose of this study is to perform the dosimetric comparison between intensity modulated radiation therapy imrt and volumetric modulated arc therapy vmat for the prostate cancer by using dosevolume histograms dvh. On the sensitivity of common gammaindex evaluation methods. There are fixed jaws defining the largest field that can be created as being 21 cm along the leaf direction by 16 cm perpendicular to the leaf movement direction projected to. Volumetric modulated arc therapy vmat has been adopted by many clinics for its. Clinical utility of rapidarctm radiotherapy technology erminia infusino department of radiotherapy, campus biomedico university hospital, rome, italy abstract.
Vmat and ht plans were delivered using elekta s precisebeam vmat linac control system elekta ab, stockholm, sweden and a tomotherapy hi. Monaco treatment planning system tools and optimization. Searching standard parameters for volumetric modulated arc. With consistent templates, planning vmat imrt is much easier. The study focuses on vmat delivered with the elekta mlc known as the beam modulator. It reduced v 5, v 10, v 30, and mld of normal lung compared with vmat and protected the oars better with fewer mus with the cost of a little higher v 5, v 10. A treatment planning study comparing elekta vmat and fixed field. In vmat, treatment is delivered on a linear accelerator using a cone beam that. The elekta agility was previously commissioned for both imrt and vmat 11 treatments. Most elekta vmat physicists have commissioned their systems by comparing measured dose profiles of vmat planned patient cases. 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.
Cover part of the pdf page with a white rectangle so the contents is no longer visible. Dosimetric comparisons of volumetric modulated arc therapy. All published manuscripts reporting the use of vmat in a clinical setting from 2009 to. As a result, elekta developed rotational imrt, a delivery technique known as volumetric. Dosimetric comparison of different treatment modalities for. Monaco vmat versus xio, vmat, vmat rectum v 40 gy % p 0. Pdf since december 2009 a new vmat planning system tool is available in oncentra masterplan. Elekta tps users meeting 2012 marius treutwein department of. Easily find and replace all occurrences of words in a pdf. All 20 plans 10 vmat and 10 imrt were delivered on an elekta agility linear accelerator elekta, stockholm, sweden at an energy of 6 m v. Elekta vmat radiation therapy rapidly gaining users worldwide as technique evolves between the evaluated tumor regions and prescribed doses, cmat were identified.
Gallen, switzerland find articles by samuel peters. Optimization methods for volumetric modulated arc therapy and. Elekta vmat radiation therapy rapidly gaining users worldwide as technique evolves however, the target coverage of the for the singlearc technique, 8 plans met the objectives, 9 after modification. Most elekta vmat physicists have commissioned their systems by comparing measured dose profiles of vmatplanned patient cases. Outstanding flexibility elekta infinity will give us a competitive advantage over other. Elekta synergy radiotherapy unit, which incorporates a kv imaging system orthogonal to the mv treatment axis. Effective heartsparing whole lung irradiation using. Two years alone in the wilderness escape the city to build off grid log cabin duration.
This mlc has 40 leaf pairs each of nominal width 4 mm projected to isocentre. Vmat testing for an elekta accelerator article pdf available in journal of applied clinical medical physics 2. Full responsibility of the clinical use of shared templates resides with. Elekta infinity offers you a choice use a single arc or choose multiple arcs to optimize the vmat plan. Because physicians can modulate or control the intensity of the radiation beam in vmat and tomotherapy, both treatments provide high precision radiation with which tumors that are curved around critical organs can be treated. The hybrid plans were combination of 2 partial arcs vmat and 5field imrt. April 9, 2012 elekta announced it has received clearance to ce mark agility, a beamshaping device integrated into the head of a linear accelerator linac. Patients and clinics will benefit from the speed and reliability of this new mlc multileaf collimator design. A model based on a specific phantom, called quaarc, has been designed for the evaluation of planning and verification systems of complex radiotherapy treatments, such as volumetric modulated arc therapy vmat. Late cardiovascular diseaserelated adverse events are one of the most common causes of premature mortality among longterm survivors of childhood cancer. Elektas mosaiq oncology information system has received certification from the office of the national coordinator for health information technology onchealth it 2015 edition health it module. Training program elekta synergy human health campus iaea.
Pipspro is the first commercial machine qa software to determine leaf speed loss. Automate the analysis of over thirty tg142 recommended qa tasks. Elekta vmat volumetric modulated arc therapy 3d imagery. When detectors become more efficient in detecting mv photons there are several possibilities fo.
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