Abstract #4111

Experimentally Optimizing Labeling Position in Pseudo-continuous ASL in the Presence of Carotid Artery Stenting

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

¹GE Healthcare, Taipei, Taiwan, ²GE Healthcare MR Research China, Beijing, China, People's Republic of, 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 inhomogeneity. Labeling position may need to be carefully applied after CAS. The aim of this study was to experimentally determine the optimal labeling position for pCASL with minimal frequency shift caused by stent in exploring cerebral perfusion in the patient with CAS treatment.

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