Jia Guo1
1Bioengineering, University of California Riverside, Riverside, CA, United States
1Bioengineering, University of California Riverside, Riverside, CA, United States
Modeling results showed that the SNR efficiency and temporal
resolution of perfusion imaging could be greatly improved if a narrow-band
velocity selectivity can be realized. We introduced modified FT-based VSI pulses
that are suitable for this purpose and ultra-fast perfusion imaging.
Figure 1.
Schematics showing that narrow-band velocity selectivity allows ultra-fast
perfusion imaging with high SNR efficiency, while conventional VSASL (wide-band
labeling) may suffer from reduced SNR efficiency due to multiple labeling on
the same bolus.
Figure 3. The
velocity-selective profiles under the label condition for both modified
rect-VSI and sinc-VSI labeling. Under the control condition, the magnetization response
was the same across all velocities
(not shown), of the same value at V = 0 under the label condition.