Table 2.
Noncontrast CT and Contrast CT Measures of Proximal LAD CSA (mm2) in OsiriX (n=28 Paired Studies Done Same Day)
| Measure | Noncontrast CT | Contrast CT | ||||
|---|---|---|---|---|---|---|
| Mean (SD) | Median | 25th, 75th percentiles | Mean (SD) | Median | 25th, 75th percentiles | |
| Area‐a | 21.4 (5.6) | 20.8 | 17.3, 24.9 | 17.6 (5.5) | 18.1 | 12.7, 21.9 |
| Area‐b | 20.2 (5.9) | 18.6 | 16.1, 25.2 | 16.2 (4.8) | 17.0 | 11.5, 19.3 |
| Area‐c | 18.8 (5.6) | 19.0 | 14.7, 22.1 | 15.4 (4.9) | 14.9 | 11.2, 20.1 |
| Mean | 20.1 (5.2) | 20.5 | 15.6, 24.6 | 16.4 (4.8) | 16.9 | 11.7, 19.6 |
Area‐a, b, c represent the CSA of 3 equidistant points measured 1 cm proximal of the LAD. CSA indicates cross‐sectional area; CT, computed tomography; LAD, left anterior descending coronary artery; and SD, standard deviation.