Establishment of diagnostic reference levels in cardiac computed tomography

Thumbnail Image
Rawashdeh, Mohammad
Saade, Charbel
Zaitoun, Maha
Abdelrahman, Mostafa
Brennan, Patrick
Alewaidat, Haytham A.
McEntee, Mark F.
Journal Title
Journal ISSN
Volume Title
John Wiley & Sons Inc.
Published Version
Research Projects
Organizational Units
Journal Issue
The aim of this study was to determine diagnostic reference levels (DRLs) for cardiac computed tomography (CCT) in Jordan. Volume computed tomography dose index (CTDIvol) and dose–length product (DLP) were collected from 228 CCTs performed at seven Jordanian hospitals specialized in cardiac CT. DRLs for cardiac CT were defined at the 75th percentile of CTDIvol and DLP. CTDIvol and DLP were collected from 30 successive cardiac CT in each center except for one center (18 scans). The 75th percentile of the CTDIvol and the DLP of the centers calculated from mixed retrospective and prospective gated modes were 47.74 milligray (mGy) and 1035 mGy/cm, respectively. This study demonstrated wide dose variations among the surveyed hospitals for cardiac CT scans; there was a 5.1-fold difference between the highest and lowest median DLP with a range of 223.2–1146.7 mGy/cm. Differences were associated with variations in the mAs and kVp. This study confirmed large variability in CTDIvol and DLP for cardiac CT scans; variation was associated with acquisition protocols and highlights the need for dose optimization. DRLs are proposed for CCT; there remains substantial potential for optimization of cardiac CT examinations for adults in Jordan.
Cardiac computed tomography (CCT) , Volume computed tomography dose index (CTDIvol) , Dose–length product (DLP) , Diagnostic reference levels (DRL)
Rawashdeh, M., Saade, C., Zaitoun, M., Abdelrahman, M., Brennan, P., Alewaidat, H. and McEntee, M. F. 'Establishment of diagnostic reference levels in cardiac computed tomography', Journal of Applied Clinical Medical Physics, (7pp.) [In Press]. DOI: 10.1002/acm2.12711