Qualitative image quality graft segment score distribution in 254 coronary artery bypass grafts from 78 patients.

Distribution of consensual qualitative image quality graft segment scores (scores 1 to 5) in 254 coronary artery bypass grafts from 78 patients, as evaluated with 270-msec gantry rotation 256-slice MDCT and prospective ECG-gating. Score distribution is shown for the overall 762 graft segments, then separately for the 672 normal graft segments, the 42 stenotic graft segments, and the 48 occluded graft segments. Score definition: 1, nondiagnostic (diagnostic information not obtainable); 2, poor (severe artifacts with blurring of the segment lumen); 3, moderate (moderate artifacts with moderate blurring of the segment lumen); 4, good (minor artifacts with slight blurring of the segment lumen); and 5, excellent (no artifacts with clear delineation of the entire segment lumen).
n: number;
*: overall graft segments (either normal, ≥ 50% stenotic, or occluded).
**: graft segments with none or < 50% stenosis.
***: graft segments with stenosis ≥ 50%.