Abstract #4661

B0 and B1 Field Inhomogeneity Consideration in Pseudo-continuous ASL Due to the Presence of Carotid Artery Stenting

Chien-Yuan Eddy Lin^1,2, Jianxun Qu², Ai-Chi Chen¹, Yen-Chien Wu³, David Yen-Ting Chen³, Ying-Chi Tseng³, and Chi-Jen Chen³

¹GE Healthcare, Taipei, Taiwan, ²GE Healthcare MR Research China, Beijing, People's Republic of China, ³Department of Radiology, Taipei Medical University - Shuang Ho Hospital, New Taipei City, Taiwan

Pseudo-continuous arterial spin labeling (pCASL) has been recently used for investigating cerebral hemodynamic change on the patient receiving carotid artery stenting (CAS) because it permits repeated measurement of absolute cerebral blood flow in a short interval without MR contrast agent or radioactive material. However, labeling efficiency of pCASL has been proved to be dependent on B₀ and B₁ inhomogeneity. The aim of this study was to understand how inhomogeneous of the B₀ and B₁ at labeling position of pCASL and find the remedies of the pCASL measurement for the CAS patient.

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