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Coronary artery calcium scoring using multicardiac computed tomography.
Jun Horiguchi1, Tadashi Nakanishi, Akihisa Tamura
1Department of Radiology, Division of Medical Intelligence and Informatics, Programs for Applied Biomedicine, Graduate School of Biomedical Sciences, Hiroshima University. 1-2-3 Kasumi-cho, Minami-ku, Hiroshima 745-8551, Japan. horiguch@hiroshima-u.ac.jp
Journal of Computer Assisted Tomography
|December 19, 2002
Summary
Multicardiac-phase computed tomography (CT) can improve coronary artery calcium scoring by identifying phases with minimal motion artifacts. This technique enhances the accuracy of calcium quantification in patients.
Area of Science:
- Cardiovascular Imaging
- Medical Physics
- Radiology
Background:
- Accurate quantification of coronary artery calcium (CAC) is crucial for cardiovascular risk assessment.
- Traditional CT methods can be affected by motion artifacts, potentially impacting calcium score accuracy.
Purpose of the Study:
- To evaluate whether multicardiac-phase computed tomography (CT) enhances the precision of coronary artery calcium quantification.
- To assess the impact of motion artifacts across different cardiac phases on CAC scoring.
Main Methods:
- A cardiac phantom with calcium-phosphate deposits and 108 calcified plaques from 50 patients were scanned using multicardiac-phase CT.
- Motion artifacts and calcium scores were analyzed and compared across various cardiac phases and CT scanners.
Main Results:
- Phantom imaging revealed significant variations in motion artifacts and calcium scores between cardiac phases compared to static scans.
- Patient studies demonstrated that motion artifacts during the cardiac cycle influenced coronary calcification scores, highlighting variability.
Conclusions:
- Multicardiac-phase CT shows promise for improving CAC quantification.
- Identifying the optimal cardiac phase with minimal motion artifacts for each plaque can lead to more accurate calcium scoring.