CyberArc: a non-coplanar-arc optimization algorithm for CyberKnife.

Abstract:

:The goal of this study is to demonstrate the feasibility of a novel non-coplanar-arc optimization algorithm (CyberArc). This method aims to reduce the delivery time of conventional CyberKnife treatments by allowing for continuous beam delivery. CyberArc uses a 4 step optimization strategy, in which nodes, beams, and collimator sizes are determined, source trajectories are calculated, intermediate radiation models are generated, and final monitor units are calculated, for the continuous radiation source model. The dosimetric results as well as the time reduction factors for CyberArc are presented for 7 prostate and 2 brain cases. The dosimetric quality of the CyberArc plans are evaluated using conformity index, heterogeneity index, local confined normalized-mutual-information, and various clinically relevant dosimetric parameters. The results indicate that the CyberArc algorithm dramatically reduces the treatment time of CyberKnife plans while simultaneously preserving the dosimetric quality of the original plans.

journal_name

Phys Med Biol

authors

Kearney V,Cheung JP,McGuinness C,Solberg TD

doi

10.1088/1361-6560/aa6f92

subject

Has Abstract

pub_date

2017-06-26 00:00:00

pages

5777-5789

issue

14

eissn

0031-9155

issn

1361-6560

journal_volume

62

pub_type

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