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Coronary Artery Calcium Measurement

Agreement of Multirow Detector and Electron Beam CT

Christoph R. Becker1, Timm Kleffel1, Alexander Crispin2, Andreas Knez3, Jason Young4, U. Joseph Schoepf1, Ralph Haberl3 and Maximilian F. Reiser1

1 Department of Clinical Radiology, Ludwig-Maximilians-University Munich, Grosshadern, Marchioninistr. 15, D-81377 Munich, Germany.
2 Department of Medical Data Processing, Biometry, and Epidemiology, Ludwig-Maximilians-University Munich, Grosshadern, D-81377 Munich, Germany.
3 Department of Internal Medicine—Cardiology, Ludwig-Maximilians-University Munich, Grosshadern, D-81377 Munich, Germany.
4 Neolmagery Technologies, 17700 Castleton St., City of Industry, CA 91748.



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  		Fig. 1A. —50-year-old man with suspected coronary artery disease. Electron beam CT image shows no calcium in artery (arrow).

 


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  		Fig. 1B. —50-year-old man with suspected coronary artery disease. Multirow detector CT scan shows minute calcification (arrow) in distal part of left anterior descending coronary artery.

 


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  		Fig. 2. —Diagram shows receiver operating characteristic curves for electron beam CT (solid line) and multirow detector CT (dotted line). Difference of areas under receiver operating characteristic curves did not achieve statistical significance.

 


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  		Fig. 3. —Diagram compares receiver operating characteristic curves of multirow detector CT scores reevaluated with thresholds of 130 (solid line) and 90 (dotted line) H. Area under curve, sensitivity, and specificity are same for both quantification algorithms.

 

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