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Fig. 3F. —69-year-old man complaining of anterior chest pain (heart rate, 55 beats per minute). Transaxial images from first electron beam CT (EBCT) (A), second EBCT (B), first 1.25-mm-thickness MDCT (C), second 1.25-mm-thickness MDCT (D), first 2.5-mm-thickness MDCT (E), and second 2.5-mm-thickness MDCT (F) show heart. Calcium in right coronary artery is most clearly seen on 1.25-mm-thickness MDCT. On EBCT, calcium is detected on first scan and is not detected on second scan.