TY - JOUR
T1 - Radiation doses of various CT protocols
T2 - A multicenter longitudinal observation study
AU - Jang, Jinhee
AU - Jung, Seung Eun
AU - Jeong, Woo Kyoung
AU - Lim, Yeon Soo
AU - Choi, Joon Il
AU - Park, Michael Yong
AU - Kim, Yongsoo
AU - Lee, Seung Koo
AU - Chung, Jae Joon
AU - Eo, Hong
AU - Yong, Hwan Seok
AU - Hwang, Sung Su
N1 - Publisher Copyright:
© 2016 The Korean Academy of Medical Sciences.
PY - 2016
Y1 - 2016
N2 - Emerging concerns regarding the hazard from medical radiation including CT examinations has been suggested. The purpose of this study was to observe the longitudinal changes of CT radiation doses of various CT protocols and to estimate the long-term efforts of supervising radiologists to reduce medical radiation. Radiation dose data from 11 representative CT protocols were collected from 12 hospitals. Attending radiologists had collected CT radiation dose data in two time points, 2007 and 2010. They collected the volume CT dose index (CTDIvol) of each phase, number of phases, dose length product (DLP) of each phase, and types of scanned CT machines. From the collected data, total DLP and effective dose (ED) were calculated. CTDIvol, total DLP, and ED of 2007 and 2010 were compared according to CT protocols, CT machine type, and hospital. During the three years, CTDIvol had significantly decreased, except for dynamic CT of the liver. Total DLP and ED were significantly decreased in all 11 protocols. The decrement was more evident in newer CT scanners. However, there was substantial variability of changes of ED during the three years according to hospitals. Although there was variability according to protocols, machines, and hospital, CT radiation doses were decreased during the 3 years. This study showed the effects of decreased CT radiation dose by efforts of radiologists and medical society.
AB - Emerging concerns regarding the hazard from medical radiation including CT examinations has been suggested. The purpose of this study was to observe the longitudinal changes of CT radiation doses of various CT protocols and to estimate the long-term efforts of supervising radiologists to reduce medical radiation. Radiation dose data from 11 representative CT protocols were collected from 12 hospitals. Attending radiologists had collected CT radiation dose data in two time points, 2007 and 2010. They collected the volume CT dose index (CTDIvol) of each phase, number of phases, dose length product (DLP) of each phase, and types of scanned CT machines. From the collected data, total DLP and effective dose (ED) were calculated. CTDIvol, total DLP, and ED of 2007 and 2010 were compared according to CT protocols, CT machine type, and hospital. During the three years, CTDIvol had significantly decreased, except for dynamic CT of the liver. Total DLP and ED were significantly decreased in all 11 protocols. The decrement was more evident in newer CT scanners. However, there was substantial variability of changes of ED during the three years according to hospitals. Although there was variability according to protocols, machines, and hospital, CT radiation doses were decreased during the 3 years. This study showed the effects of decreased CT radiation dose by efforts of radiologists and medical society.
KW - Longitudinal studies
KW - Multidetector computed tomography
KW - Radiation dose
KW - Radiology
UR - http://www.scopus.com/inward/record.url?scp=84958760745&partnerID=8YFLogxK
U2 - 10.3346/jkms.2016.31.S1.S24
DO - 10.3346/jkms.2016.31.S1.S24
M3 - Article
C2 - 26908984
AN - SCOPUS:84958760745
SN - 1011-8934
VL - 31
SP - S24-S31
JO - Journal of Korean Medical Science
JF - Journal of Korean Medical Science
ER -