Quantitative assessment of global cortical perfusion (mean quantitative values)
| Observer 1 | Observer 2 | Observer 3 | Observer 4 | Observer 5 | Observer 6 | |
|---|---|---|---|---|---|---|
| CBF (mL/100 g/min) | 42.60 | 36.52 | 41.44 | 46.85 | 51.53 | 41.58 |
| CBV (mL/100 g) | 2.04 | 1.98 | 2.13 | 2.24 | 2.78 | 2.01 |
| MTT (seconds) | 5.39 | 5.87 | 5.35 | 5.39 | 5.59 | 5.50 |
Note:—CBF indicates cerebral blood flow; CBV, cerebral blood volume; MTT, mean transit time. Observer 1, radiology resident physician; observer 2, neuroradiology attending physician; observer 3, neurology attending physician; observer 4, neuroradiology fellow; observer 5, junior CT technologist; observer 6, senior CT technologist.