FACTORS INFLUENCING SIZE-SPECIFIC DOSE ESTIMATES OF SELECTED COMPUTED TOMOGRAPHY PROTOCOLS AT TWO CLINICAL PRACTICES IN SOUTH AFRICA.

Autor:	Sebelego IK; Department of Clinical Sciences, Faculty of Health and Environmental Sciences, Central University of Technology, Bloemfontein, 9301, South Africa., Acho S; Department of Medical Physics, Faculty of Health Sciences, University of the Free State, Bloemfontein, 9300, South Africa., van der Merwe B; Department of Clinical Sciences, Faculty of Health and Environmental Sciences, Central University of Technology, Bloemfontein, 9301, South Africa., Rae WID; Department of Medical Physics, Faculty of Health Sciences, University of the Free State, Bloemfontein, 9300, South Africa.; Medical Imaging Department, Prince of Wales Hospital, Randwick, 2133, Australia.
Jazyk:	angličtina
Zdroj:	Radiation protection dosimetry [Radiat Prot Dosimetry] 2023 May 03; Vol. 199 (7), pp. 588-602.
DOI:	10.1093/rpd/ncad059
Abstrakt:	The study aimed to determine the factors that impact the size-specific dose estimate (SSDE) for computed tomography (CT) examinations of the chest-abdomen-pelvis and abdomen-pelvis protocols in two clinical radiology practices and evaluate the image quality of these protocols. Imaging parameters, protocols, dose metrics from the CT units and size-related parameters to calculate the SSDE were documented. The image quality of the CT images was assessed using an image subtraction algorithm. The SSDE increased as the volumetric CT dose index (CTDIvol), and the patient's body mass index increased, respectively. Significant differences (p < 0.001) occurred between the two hospitals regarding image quality. However, these differences were not indicative of differences in the diagnostic performances for task-based imaging protocols. Different clinical protocols should be reviewed to optimise dose. The inclusion of the pre-monitoring sequence, age of the machine and the scan requisition parameters impacted the SSDEs. Image quality should be assessed to evaluate the consistency of image quality between protocols applied by different CT units when assessing SSDEs. (© The Author(s) 2023. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.)
Databáze:	MEDLINE
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