演題抄録

International Session(Poster)

開催概要
開催回
第51回・2013年・京都
 

Compare RapidArc and IMRT for NPC Radiotherapy Planning: the NCCS Experience

演題番号 : ISP-8

[筆頭演者]
Jing Hu:1 
[共同演者]
Zubin Master:1、Jerome Yap:1、James Lee:1、Joseph Wee:1

1:Radiation Oncology, National Cancer Center of Singapore, Singapore

 

Abstract: Aim: To evaluate dosimetric planning parameters and delivery efficiency between RapidArc and dMLC based Intensity Modulated Radiation Therapy (IMRT) in treating nasopharyngeal carcinoma (NPC), before the clinical implementation of RapidArc planning for NPC at the National Cancer Center, Singapore.Methods: 10 NPC cases with UICC/AJCC 7th Edition staging selected across T1N0M0 to T4N3M0, who were previously planned and treated with 9 field dMLC based IMRT, were re-planned using a 2 Arc RapidArc plan on the Varian Eclipse treatment planning system. The cases selected were managed and originally contoured by the same radiation oncologist and planned by the same dosimetrist to eliminate inter-observer variations and maintain consistency. Various parameters have been extracted for all 10 cases, to compare the two planning techniques. The parameters extracted are Radiation Conformity index (RCI = [VT,Pi * VT,Pi ]/ [VT * VPi]), Dose Homogeneity index (DHI = [DPTV,1%-DPTV,99%]/DMean *100), final Total MU (TMU), target coverage indices (D99%, D95% for PTV and Dmin for GTV), OAR dose tolerances (based on RTOG0615 guidelines), planning time and calculation time.Results: Results and conclusions will be presented at the conference.

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