Fig. 3a, b.

Dual-source CT scan in a 73-year-old man with suspected coronary artery disease (mean heart rate during scanning 86 bpm, Agatston score 259). a Thin-slab maximum-intensity projection shows stenosis of the distal right coronary artery near the origin of the posterior descending artery. This stenosis was rated significant (i.e., >50% luminal diameter narrowing) by both readers. b Invasive coronary angiography in a right anterior oblique projection shows irregular luminal narrowing in the distal right coronary artery that was qualitatively graded as less than 50% luminal diameter narrowing, resulting in a false positive diagnosis in DSCT coronary angiography