Quality assurance of a breathing controlled four-dimensional computed tomography algorithm.

ABSTRACT:

Background & purpose

Four-dimensional computed tomography (4DCT) scans are standardly used for radiotherapy planning of tumors subject to respiratory motion. Based on online analysis and automatic adaption of scan parameters to the patient's individual breathing pattern, a new breathing-controlled 4DCT (i4DCT) algorithm attempts to counteract irregular breathing and thus prevent artifacts. The aim of this study was to perform an initial quality assurance for i4DCT.

Material & methods

To validate the i4DCT algorithm, phantom measurements were performed to evaluate geometric accuracy (diameter, volume, eccentricity), image quality (dose-normalized contrast-noise-ratio, CT number accuracy), and correct representation of motion amplitude of simulated tumor lesions. Furthermore,

SUBMITTER: Szkitsak J 

PROVIDER: S-EPMC9283927 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature