TABLE 2.
Summary of Quantitative Evaluations in Cohort 2
| Artifact Score MRAC Type |
Interpretability Score MRAC Type |
Uptake Evaluation MRAC Type |
||||||
|---|---|---|---|---|---|---|---|---|
| Breath-Held GRE |
Free-Breathing Radial GRE |
|||||||
| Patient # | Breath-Held GRE |
Free-Breathing Radial GRE |
Coronary | Aorta | Coronary | Aorta | Breath-Held GRE |
Free-Breathing Radial GRE |
| 1 | 4 | 0 | 1 | 1 | 0 | 0 | — | — |
| 2 | 0 | 1 | 0 | 0 | 0 | 0 | — | — |
| 3 | 2 | 0 | 1 | 1 | 0 | 0 | — | — |
| 4 | 4 | 0 | 1 | 1 | 0 | 0 | — | RCA |
| 5 | 3 | 0 | 1 | 1 | 0 | 0 | — | — |
| 6 | 3 | 0 | 1 | 1 | 0 | 0 | — | LAD |
| 7 | 2 | 0 | 1 | 1 | 0 | 0 | — | — |
| 8 | 3 | 1 | 1 | 1 | 0 | 0 | — | RCA |
| 9 | 2 | 0 | 2 | 2 | 2 | 2 | — | — |
| 10 | 3 | 0 | 1 | 1 | 0 | 0 | — | — |
| 11 | 1 | 0 | 1 | 1 | 0 | 0 | — | — |
| 12 | 4 | 0 | 1 | 1 | 0 | 0 | LAD | LAD, LCx |
| 13 | 3 | 0 | 1 | 1 | 0 | 0 | — | — |
| 14 | 3 | 0 | 1 | 1 | 0 | 0 | — | — |
| 15 | 4 | 0 | 1 | 1 | 0 | 0 | — | LAD, RCA |
| 16 | 3 | 0 | 1 | 1 | 0 | 0 | — | — |
| 17 | 3 | 0 | 1 | 1 | 0 | 0 | — | — |
| Average (mean) (median, interquartile range) | 2.76 (3, 2–3) | 0.12 (0, 0–0) | 1 (1, 1–1) | 1 (1, 1–1) | 0.12 (0, 0–0) | 0.12 (0, 0–0) | ||
The artifact score was the summation of reader-assigned marks for each artifact observed in positron emission tomographic images reconstructed with either breath-held or free-breathing MRAC. The interpretability score was the enumeration of readers’ evaluations of the interpretability of radiotracer uptake in the coronary arteries and aorta. For uptake evaluation, readers recorded vessels in which focal radiotracer uptake was identified.
GRE = gradient-recalled echo; LAD = left anterior descending coronary artery; LCx = left circumflex coronary artery; MRAC = magnetic resonance attenuation correction; RCA = right coronary artery.