Comparison of the progressive resolution optimizer and photon optimizer in VMAT optimization for stereotactic treatments

Journal of Applied Clinical Medical Physics
Han LiuDavid Wiant

Abstract

The photon optimization (PO) algorithm was recently released by Varian Medical Systems to improve volumetric modulated arc therapy (VMAT) optimization within Eclipse (Version 13.5). The purpose of this study is to compare the PO algorithm with its predecessor, progressive resolution optimizer (PRO) for lung SBRT and brain SRS treatments. A total of 30 patients were selected retrospectively. Previously, all the plans were generated with the PRO algorithm within Eclipse Version 13.6. In the new version of PO algorithm (Version 15), dynamic conformal arcs (DCA) were first conformed to the target, then VMAT inverse planning was performed to achieve the desired dose distributions. PTV coverages were forced to be identical for the same patient for a fair comparison. SBRT plan quality was assessed based on selected dose-volume parameters, including the conformity index, V20 for lung, V30 Gy for chest wall, and D0.035 cc for other critical organs. SRS plan quality was evaluated based on the conformity index and normal tissue volumes encompassed by the 12 and 6 Gy isodose lines (V12 and V6 ). The modulation complexity score (MCS) was used to compare plan complexity of two algorithms. No statistically significant differences between the ...Continue Reading

References

Jun 6, 2000·International Journal of Radiation Oncology, Biology, Physics·M A ManningW C Broaddus
Jun 13, 2006·International Journal of Radiation Oncology, Biology, Physics·Tingyi XiaJoe Y Chang
Jul 19, 2007·Journal of Thoracic Oncology : Official Publication of the International Association for the Study of Lung Cancer·Hiroshi OnishiTsutomu Araki
May 12, 2009·International Journal of Radiation Oncology, Biology, Physics·Neal E DunlapJames M Larner
Mar 17, 2010·Medical Physics·Andrea L McNivenThomas G Purdie
Oct 1, 2010·Medical Physics·Stanley H BenedictFang-Fang Yin
Feb 8, 2011·Physics in Medicine and Biology·Cedric X Yu, Grace Tang
Feb 9, 2011·International Journal of Radiation Oncology, Biology, Physics·David J SherRinaa S Punglia
Oct 26, 2013·Clinical Lung Cancer·Ajay P SandhuArno J Mundt

❮ Previous
Next ❯

Citations

Apr 20, 2020·Journal of Applied Clinical Medical Physics·Damodar PokhrelLana Sanford
Oct 20, 2020·Journal of Applied Clinical Medical Physics·Vivian U Y ChowAnthony T C Chan
Aug 19, 2020·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·William M GilesJustus D Adamson
May 24, 2020·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·Justin VisakDamodar Pokhrel
Mar 27, 2021·Journal of Applied Clinical Medical Physics·Motoharu SasakiHitoshi Ikushima
Dec 12, 2020·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·Damodar PokhrelWilliam St Clair

❮ Previous
Next ❯

Software Mentioned

Varian Eclipse
Eclipse TPS
Eclipse
Eclipse treatment planning system ( TPS )
VMAT

Related Concepts

Related Feeds

Buruli Ulcer

Buruli ulcer is a progressive disease of subcutaneous tissues caused by mycobacterium ulcerans. Here is the latest research.