Influence of inter-fractional respiratory motion changes on dose delivery accuracy in dynamic conformal arc lung stereotactic body radiotherapy: A phantom study.

ABSTRACT:

Purpose

To evaluate the influence of inter-fractional respiratory motion variation on dose delivery accuracy in dynamic conformal arc lung stereotactic body radiotherapy (SBRT) using glass dosimeter and QUASARTM respiratory motion phantom.

Materials and methods

Four-dimensional computed tomography (4D-CT) was acquired using a sinusoidal respiratory waveform (amplitude: 10 mm, breaths per minute [BPM]: 20). Three glass dosimeters were positioned at the superior edge, geometric center, and inferior edge of the tumor target. Internal target volume (ITV)-SBRT and gated-SBRT plans were created and delivered under nine respiratory conditions (BPM: 10-30, amplitude: 5-30 mm). Treatment was considered acceptable if the delivered dose to the glass dosimeters remained within the D5%-D

SUBMITTER: Bae BK 

PROVIDER: S-EPMC12677502 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature