Accurate Measurement the Transit Time and Tag Delivery Time of Pulsed Arterial Spin Labeling: Comparing 8-Channel Phased Array Coil and Quadrature Birdcage Coil
Lou X, sun w, Cao G, Cai Y
PLA General Hospital
The recently developed 8-channel phased array coil gives us an opportunity to improve the SNR of pulsed arterial spin labeling (PASL) not only from the array receivers but also from the wider tagging bands with the whole-body excitation coil. In this study, we accurately measured the transit time and tag delivery time of PASL using both 8-channel phased array coil and quadrature birdcage coil. The results show that the tag delivery time was about 100ms longer for the former. This will certainly help to improve the SNR of PASL. Besides this, the transit time was also obtained and could be used for accurate CBF calculation.