Clinical Implementation of Proton Therapy Using Pencil-Beam Scanning Delivery Combined With Static Apertures.

ABSTRACT: Proton therapy makes use of the favorable depth-dose distribution with its characteristic Bragg peak to spare normal tissue distal of the target volume. A steep dose gradient would be desired in lateral dimensions, too. The widespread spot scanning delivery technique is based, however, on pencil-beams with in-air spot full-widths-at-half-maximum of typically 1 cm or more. This hampers the sparing of organs-at-risk if small-scale structures adjacent to the target volume are concerned. The trimming of spot scanning fields with collimating apertures constitutes a simple measure to increase the transversal dose gradient. The current study describes the clinical implementation of brass apertures in conjunction with the pencil-beam scanning delivery mode at a horizontal, clinical treatment head

SUBMITTER: Baumer C 

PROVIDER: S-EPMC8149965 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature