Commissioning of SharePlan: The Liverpool Experience

17th International Conference on the Use of Computers in Radiation Therapy

物理学;计算机科学

Xing, Aitang^1 ; Deshpande, Shrikant^1,3 ; Arumugam, Sankar^1 ; George, Armia^1 ; Holloway, Lois^1,2,3,4 ; Goozee, Gary^1,4

Liverpool and Macarthur Cancer Therapy Centres, Ingham Institute, Liverpool Hospital, Sydney, NSW, Australia^1

Institute of Medical Physics, School of Physics, University of Sydney, Sydney, NSW, Australia^2

Centre for Medical Radiation Physics, University of Wollongong, Wollongong, NSW, Australia^3

South Western Sydney Clinical School, University of New South Wales, Sydney, NSW, Australia^4

关键词: Intensity-modulated radiotherapy;    Ion chamber arrays;    Optimal plan;    Out-of-memory errors;    Photon beams;    Software program;    Tomotherapy;    Treatment planning systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/489/1/012064/pdf
DOI  :  10.1088/1742-6596/489/1/012064

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

SharePlan is a treatment planning system developed by Raysearch Laboratories AB to enable creation of a linear accelerator intensity modulated radiotherapy (IMRT) plan as a backup for a Tomotherapy plan. A 6MV Elekta Synergy Linear accelerator photon beam was modelled in SharePlan. The beam model was validated using Matrix Evolution, a 2D ion chamber array, for two head-neck and three prostate plans using 3%/3mm Gamma criteria. For 39 IMRT beams, the minimum and maximum Gamma pass rates are 95.4% and 98.7%. SharePlan is able to generate backup IMRT plans which are deliverable on a traditional linear accelerator and accurate in terms of clinical criteria. During use of SharePlan, however, an out-of-memory error frequently occurred and SharePlan was forced to be closed. This error occurred occasionally at any of these steps: loading the Tomotherapy plan into SharePlan, generating the IMRT plan, selecting the optimal plan, approving the plan and setting up a QA plan. The out-of-memory error was caused by memory leakage in one or more of the C/C++ functions implemented in SharePlan fluence engine, dose engine or optimizer, as acknowledged by the manufacturer. Because of the interruption caused by out-of-memory errors, SharePlan has not been implemented in our clinic although accuracy has been verified. A new software program is now being provided to our centre to replace SharePlan.