Coronary artery calcium scoring using 16-MDCT and a retrospective ECG-gating reconstruction algorithm

Area of Science:

• Cardiovascular Imaging
• Radiology
• Medical Diagnostics

Background:

• Electron beam CT (EBCT) is the established standard for coronary artery calcium (CAC) assessment.
• Accurate CAC quantification is crucial for cardiovascular risk stratification.

Purpose of the Study:

• To compare the detection, quantification, and cardiovascular risk stratification capabilities of CAC between EBCT and 16-MDCT using retrospective reconstruction.
• To evaluate the diagnostic performance of 16-MDCT for identifying coronary artery atherosclerosis.

Main Methods:

• One hundred patients underwent both EBCT and 16-MDCT scans.
• CAC score, volume, and mass were obtained from both modalities.
• Statistical analysis included correlation coefficients, sensitivity, specificity, and Cohen's kappa.

Main Results:

• High correlations were observed between EBCT and 16-MDCT for CAC score (r²=0.955), volume (r²=0.952), and mass (r²=0.977).
• 16-MDCT demonstrated high sensitivity (98.7%) and specificity (100%) for CAC detection.
• Cardiovascular risk stratification showed high agreement (Cohen's kappa=0.929) between the two CT scanners, with no significant difference (p=0.157).

Conclusions:

• 16-MDCT with retrospective reconstruction offers high agreement with EBCT for CAC detection and quantification.
• This modality shows promise for the accurate assessment of coronary artery atherosclerosis and cardiovascular risk stratification.