Table 3. Intracranial (IC), above the CoW, and GM intensity normalized correlation coefficient between ASL and [15O]H2O PET CBF evaluated at subject level (mean±s.d.).
AccASL | Single VS-ASL | Dual VS-ASL | pCASL no crush | pCASL crush | |
---|---|---|---|---|---|
Correlation with PET CBF | |||||
IC | 0.85±0.02 | 0.62±0.08 | 0.65±0.03 | 0.84±0.01 | 0.82±0.02 |
Above CoW | 0.89±0.02 | 0.72±0.08 | 0.84±0.02 | 0.91±0.01 | 0.91±0.02 |
GM | 0.35±0.06 | 0.13±0.06 | 0.14±0.06 | 0.38±0.05 | 0.39±0.06 |
Correlation with PET aCBV | |||||
IC | 0.72±0.06 | 0.54±0.09 | 0.58±0.06 | 0.74±0.06 | 0.73±0.06 |
Above CoW | 0.75±0.06 | 0.60±0.10 | 0.70±0.06 | 0.79±0.06 | 0.79±0.06 |
GM | 0.15±0.06 | 0.03±0.06 | 0.11±0.06 | 0.28±0.07 | 0.28±0.07 |
Abbreviations: aCBV, arterial cerebral blood volume; AccASL, acceleration-selective arterial spin labeling; CBF, cerebral blood flow; CoW, circle of Willis; GM, gray matter; pCASL, pseudo-continuous ASL; PET, positron emission tomography; VS-ASL, velocity-selective ASL.