Abstract
While modulated arc (mARC) capabilities have been available on Siemens linear accelerators for almost two years now, there was, until recently, only one treatment planning system capable of planning these treatments. The Eclipse treatment planning system now offers a module that can plan for mARC treatments. The purpose of this work was to test the module to determine whether it is capable of creating clinically acceptable plans. A total of 23 plans were created for various clinical sites and all plans delivered without anomaly. The average 3%/3 mm gamma pass rate for the plans was 98.0%, with a standard deviation of 1.7%. For a total of 14 plans, an equivalent static gantry IMRT plan was also created to compare delivery time. In all but two cases, the mARC plans delivered significantly faster than the static gantry plan. We have confirmed the successful creation of mARC plans that are deliverable with high fidelity on an ARTISTE linear accelerator, thus demonstrating the successful implementation of the Eclipse mARC module.PACS numbers: 87.55.D‐, 87.55.ne, 87.57.uq,
Highlights
Since 2012, Siemens has offered the possibility of delivering volumetric-modulated arc (Siemens AG, Munich, Germany) therapy on its family of linear accelerators
The purpose of this paper is to provide the first report on the clinical performance of the new Eclipse modulated arc (mARC) module
The Eclipse module tested here was observed to be capable of creating treatment plans which met all of the planning criteria from Task Group 119 (TG-119), except for the ‘Hard C-Shape’, which the authors of the report admit to being likely unreachable
Summary
Since 2012, Siemens has offered the possibility of delivering volumetric-modulated arc (mARC) (Siemens AG, Munich, Germany) therapy on its family of linear accelerators. Multiple groups have published[1,2,3,4,5,6,7,8,9,10,11] on the use of modulated arcs in the treatment of cancer in varying sites and they have shown that the technique is able to achieve dose distributions that are typically equivalent to those from static gantry IMRT plans, but that can be delivered with much higher efficiency. Because treatment planning systems typically approximate an arc delivery as a series of static beams, the Burst Mode approach should, theoretically, cause the delivered dose to more closely approach the calculated distribution from the treatment planning system. There was only one commercial planning system (Prowess Panther, Prowess Inc, Concord, CA) capable of planning for mARC deliveries. The purpose of this paper is to provide the first report on the clinical performance of the new Eclipse mARC module
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