Selective ASL with 2D RF Pulses

Britta Lehmann¹, Dieter Ritter¹, Josef Pfeuffer¹

Different methods for selective labeling of single arteries have been developed for selective Arterial Spin Labeling. In this study, a spatially selective 2D-RF pulse was designed for a 2-channel pTX system and evaluated in human subjects. The pulse design used a variable-density TX trajectory, taking into account subject-specific B1 maps and hardware and SAR constraints. It was shown that these 2D-RF pulses can provide comparable results to the standard FOCI-PICORE method. The perfusion territories of the left internal carotid artery (ICA), right ICA and basilar artery were determined with a reasonable SNR even at small target sizes.