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Figure 1 Patient and Coronary Segment Selection Flow Chart
Only diagnostically evaluable, unstented native coronary segments  1.5 mm in luminal diameter and exhibiting 25% stenosis on visual inspection of coronary computed tomographic angiography images were initially included, resulting in exclusion of 18 patients. One patient had a completely uninterpretable study due to inappropriate contrast timing. Of the 289 segments with 25% stenosis from the remaining 84 patients, 11 were incompletely visualized on invasive coronary angiography, leaving 278 such segments for analysis. Fifty <25% stenotic segments were also randomly selected as control segments.
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