Evaluation of automatic tube current modulation of CT scanners using a dedicated and the CTDI dosimetry phantoms.

ABSTRACT:

Purpose

To investigate the operation principles of the automatic tube current modulation (ATCM) of a CT scanner, using a dedicated phantom and the CT dosimetry index (CTDI) phantom.

Material and methods

The Mercury 4.0 phantom and three different configurations of the CTDI dosimetry phantom were employed. A frequently used clinical scanning protocol was employed as a basis for the acquisitions performed with all phantoms, using both scanning directions. Additional acquisitions with different pitch and examination protocols were performed with Mercury phantom, to further explore their effect on ATCM and the resulting image quality. Different software named DICOM Info Extractor, ImageJ, and imQuest, were used to derive CTDI_vol and table position, image noise, and wa

SUBMITTER: Tsalafoutas IA 

PROVIDER: S-EPMC9278667 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature