SU-E-T-436: Fluence-Based Trajectory Optimization for Non-Coplanar VMAT
نویسندگان
چکیده
منابع مشابه
SU-E-T-609: Improving the Efficiency of VMAT Plan Optimization by Using Sparse Decomposition Method.
PURPOSE Volumetric modulated arc therapy (VMAT) is capable of delivering highly conformable dose distribution efficiently. Its planning is, however, more computationally intensive and requires a huge amount of memory space for optimization. We present an efficient sparse decomposition method for VMAT plan optimization. METHODS A quadratic objective function with volumetric constraints is expr...
متن کاملSU-E-T-619: A Network-Flow Solution Approach to VMAT Treatment Plan Optimization.
PURPOSE To add mathematical rigor to the merging phase of the recently published two-stage VMAT optimization method called VMERGE. Using an exact merging method, we are able to better characterize the tradeoff between delivery efficiency and dose quality. METHODS VMERGE begins with an IMRT plan that uses 180 equi-spaced beams and yields the "ideal" dose. Neighboring fluence maps are successiv...
متن کاملSU-E-T-164: Clinical Implementation of ASi EPID Panels for QA of IMRT/VMAT Plans.
PURPOSE To investigate various issues for clinical implementation of aSi EPID panels for IMRT/VMAT QA. METHODS Six linacs are used in our clinic for EPID-based plan QA; two Varian Truebeams, two Varian 2100 series, two Elekta Infiniti series. Multiple corrections must be accounted for in the calibration of each panel for dosimetric use. Varian aSi panels are calibrated with standard dark fiel...
متن کاملNon-coplanar trajectories to improve organ at risk sparing in volumetric modulated arc therapy for primary brain tumors.
BACKGROUND AND PURPOSE To evaluate non-coplanar volumetric modulated arc radiotherapy (VMAT) trajectories for organ at risk (OAR) sparing in primary brain tumor radiotherapy. MATERIALS AND METHODS Fifteen patients were planned using coplanar VMAT and compared against non-coplanar VMAT plans for three trajectory optimization techniques. A geometric heuristic technique (GH) combined beam scorin...
متن کاملSU-E-T-170: A Viable Approach to Patient Specific QA for Spine VMAT SRS Using EPID-Based Dosimetry.
PURPOSE VMAT involves multi-parameter modulations, thus presenting multi-dimensional challenges. Here, we present a viable approach to VMAT patient specific QA using EPID-based dosimetry for spine VMAT SRS casesMethods: Our spine VMAT SRS plans consisted of two full arcs and were optimized with 6 MV photons for a Varian Trilogy LINAC. The QA plans were computed by resetting all control points t...
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ژورنال
عنوان ژورنال: Medical Physics
سال: 2015
ISSN: 0094-2405
DOI: 10.1118/1.4924797