The reference radiation dose values from computed tomography examinations at Somdetphraphutthaloetla Hospital compared with Thai national diagnostic reference levels

Abstract

     This research was retrospective study aimed at studying the results of radiation doses from computerized tomography at Somdetphraphutthaloetla Hospital and comparing the national diagnostic reference levels of the Department of Medical Sciences Ministry of Public Health in Thailand include computed tomography dose index volume (CTDIvol), Dose length product (DLP), and Effective dose. The sample group consisted of 1,138 patients who underwent CT scans of the brain, chest, and abdomen between October 2023 to September 2024.

     The results of the study found that patients who underwent CT scans of the brain non contrast media, the brain contrast media, the chest non contrast media, the chest contrast media, whole abdomen non contrast media, and whole abdomen contrast media had CTDIvol of 59.11, 59.82, 10.21, 10.21, 13.59, and 113.59  mGy, the DLP were 1,029, 1,074, 501.66, 501.66, 629.23, and 629.23 mGy cm, The effective doses were 2.33, 2.38, 6.74, 6.74, 7.32, and 7.32 mSv. When compared with the reference radiation dose values ​​of the Department of Medical Sciences, it was found that the examination of the chest non contrast media, chest contrast media, whole abdomen non contrast media, and whole abdomen contrast media showed a CTDIvol, DLP, and Effective dose lower than the reference values ​​of the Department of Medical Sciences. The examination of the brain non contrast media, brain contrast media chest showed a CTDIvol, DLP, and Effective dose higher than the reference values ​​of the Department of Medical Sciences.