Simultaneous MV-kV imaging for intrafractional motion management during volumetric-modulated arc therapy delivery.

ABSTRACT: The purpose of this study was to evaluate the accuracy and clinical feasibility of a motion monitoring method employing simultaneously acquired MV and kV images during volumetric-modulated arc therapy (VMAT). Short-arc digital tomosynthesis (SA-DTS) is used to improve the quality of the MV images that are then combined with orthogonally acquired kV images to assess 3D motion. An anthropomorphic phantom with implanted gold seeds was used to assess accuracy of the method under static, typical prostatic, and respiratory motion scenarios. Automatic registra-tion of kV images and single MV frames or MV SA-DTS reconstructed with arc lengths from 2° to 7° with the appropriate reference fiducial template images was performed using special purpose-built software. Clinical feasibility was evaluated

SUBMITTER: Hunt MA 

PROVIDER: S-EPMC4831078 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature