Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Comparison of plan dosimetry on multi-targeted lung radiotherapy: A phantom-based computational study using IMRT and VMAT

  • Khan, Muhammad Isa (Department of Physics, University of Gujrat) ;
  • Rehman, Jalil ur (Department of Physics, Khawaja Farid University of Engineering and Information Technology) ;
  • Afzal, Muhammad (Department of Physics, The Islamia University Bahawalpur Pakistan) ;
  • Chow, James C.L. (Radiation Medicine Program, Princess Margaret Cancer Centre, University Health Network)
  • Received : 2021.12.13
  • Accepted : 2022.05.18
  • Published : 2022.10.25
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Abstract

This work analyzed the dosimetric difference between the intensity modulated radiotherapy (IMRT), partial/single/double-arc volumetric modulated arc therapy (PA/SA/DA-VMAT) techniques in treatment planning for treating more than one target of lung cancer at different isocenters. IMRT and VMAT plans at different isocenters were created systematically using a Harold heterogeneous lung phantom. The conformity index (CI), homogeneity index (HI), gradient index (GI), dose-volume histogram and mean and maximum dose of the PTV were calculated and analyzed. Furthermore, the dose-volume histogram and mean and maximum doses of the OARs such as right lung, contralateral lung and non GTV were determined from the plans. The IMRT plans showed the superior target dose coverage, higher mean and maximum values than other VMAT techniques. PA-VMAT technique shows more lung sparing and DA-VMAT increases the V5/10/20 values of contralateral lung than other VMAT and IMRT techniques. The IMRT technique achieves highly conformal dose distribution to the target than other VMAT techniques. Comparing to the IMRT plans, the higher V5/10/20 and mean lung dose were observed in the contralateral lung in the DA-VMAT.

Keywords

Acknowledgement

Authors are thankful to the Higher Education Commission(HEC), Pakistan for providing a scholarship for Dr. Muhammad Isa Khan.

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