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ID 51523
file
creator
Nagaoka, Mami
Oostveen, Luuk
Klein, Willemijn
Prokop, Mathias
subject
Coronary artery calcium scores
Ultra-high-resolution CT
Cadaver
abstract
Objectives
In this phantom- and cadaver study we investigated the differences of coronary artery calcium (CAC) volume on ultra-high-resolution computed tomography (U-HRCT) scans and conventional CT.

Methods
We scanned a coronary calcium phantom and the coronary arteries of five cadavers using U-HRCT in normal- and super-high resolution (NR, SHR) mode. The NR mode was similar to conventional CT; 896 detector channels, a matrix size of 512, and a slice thickness of 0.5 mm were applied. In SHR mode, we used 1792 detector channels, a matrix size of 1024, and a slice thickness of 0.25 mm. The CAC volume on NR- and SHR images were recorded. Differences in the physical- and the calculated CAC volume were defined as the error value and compared between NR- and SHR images of the phantom. Differences between the CAC volume on NR- and SHR scans of the cadavers were also recorded.

Results
The mean error value was lower on SHR- than NR images of the phantom (14.0 %, SD 11.1 vs 20.1 %, SD 15.2, p = 0.01). The mean CAC volume was significantly higher on SHR- than NR images of the cadavers (153.4 mm3, SD 161.0 vs 144.7 mm3, SD 164.8, p < 0.01).

Conclusions
As small calcifications were more clearly visualized on U-HRCT images in SHR mode than on conventional (NR) CT scans, SHR imaging may facilitate the accurate quantification of the CAC.
journal title
European Journal of Radiology Open
volume
Volume 7
start page
100253
date of issued
2020-09-08
publisher
Elsevier
issn
2352-0477
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
© 2020 The Authors. This is an open access article under the CC BY-NC-ND license.
relation url
department
Graduate School of Advanced Science and Engineering
Graduate School of Biomedical & Health Sciences
University Medical Hospital