TABLE 1.
Contrast-to-noise ratio by TOF and VSMRA as well as PWS and labeling efficiency of PCASL and VSASL with three velocity-encoding directions at the left and top sectors for two flow rates
| Flow rate (mL/min) | Sector | CNR | PWS | Labeling efficiency | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| VSMRA | VSASL | VSASL | |||||||||||
| TOF | FH | LR | O45° | PCASL | FH | LR | O45° | PCASL | FH | LR | O45° | ||
| 175 | Left | 17.3 | 16.5 | 42.3 | 39.2 | 2.3% | 1.1% | 3.9% | 3.9% | 0.83 | 0.25 | 0.90 | 0.90 |
| Top | 23.0 | 23.5 | 31.7 | 29.7 | 2.9% | 1.8% | 1.2% | 2.2% | 0.33 | 0.22 | 0.40 | ||
| 350 | Left | 18.9 | 12.5 | 32.5 | 28.3 | 5.1% | 3.5% | 6.4% | 7.7% | 0.85 | 0.37 | 0.68 | 0.82 |
| Top | 26.0 | 17.1 | 24.9 | 20.0 | 5.6% | 4.6% | 2.8% | 5.4% | 0.45 | 0.27 | 0.53 | ||
Note: The MRA data are from slice 29; ASL data are from slice 5.
Abbreviation: CNR, contrast-to-noise ratio.