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Tracking Coronary Calcification by Using Dual-Section Spiral CT: A 3-Year Follow-up¹

¹ From the Cardiac Rehabilitation Institute (J.S., C.I.S., M.M.) and Department of Diagnostic Imaging (S.A., Y.I.), Chaim Sheba Medical Center, Tel-Hashomer 52621, Israel. From the 1999 RSNA scientific assembly. Received January 12, 2000; revision requested February 9; revision received March 21; accepted April 4. Address correspondence to J.S. (e-mail: dshemesh@netvision.net.il).

View larger version (22K): [in a new window]   Figure 1. Graph shows the mean TCS in patients with calcification at baseline CT and at the end of the 3rd year, in accordance with baseline TCS categories. A significant increase in the mean TCS was observed in each of the baseline TCS categories after 3 years. The last four categories are quartiles. P values are for differences between the baseline and follow-up means for each category. White bars = baseline, black bars = 3-year follow-up.

View larger version (16K): [in a new window]   Figure 2. Graph shows the mean percentage increase in TCS from baseline to the 3rd year, in accordance with TCS category. The opposite trend is shown for the relationship between the baseline TCS and percentage change.

View larger version (124K): [in a new window]   Figure 3a. Dual-section spiral CT scans show a calcific lesion within the proximal part (a) of the left anterior descending (LAD) coronary artery at (a) baseline and (b) 3-year follow-up. TCS at this level increased from 31 to 108. MLCA = main left coronary artery; RCA = right coronary artery.

View larger version (120K): [in a new window]   Figure 3b. Dual-section spiral CT scans show a calcific lesion within the proximal part (a) of the left anterior descending (LAD) coronary artery at (a) baseline and (b) 3-year follow-up. TCS at this level increased from 31 to 108. MLCA = main left coronary artery; RCA = right coronary artery.

View larger version (136K): [in a new window]   Figure 4a. Dual-section spiral CT scans show a typical minimally calcific lesion (arrow) at (a) baseline and (b) 3-year follow-up. In b, the lesion’s area has doubled and its TCS has increased from 1 to 2. To enable identification of the minimally calcific lesions, automatic highlighting of the calcification was used, which gave a gray coloration to the calcification.

View larger version (133K): [in a new window]   Figure 4b. Dual-section spiral CT scans show a typical minimally calcific lesion (arrow) at (a) baseline and (b) 3-year follow-up. In b, the lesion’s area has doubled and its TCS has increased from 1 to 2. To enable identification of the minimally calcific lesions, automatic highlighting of the calcification was used, which gave a gray coloration to the calcification.