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Abstract #2192

Chemical exchange saturation transfer for detecting altered APT in arterial stenosis at 7T

Xinyu Wang1, Jinhao Lyu1, Jianxun Qu2, Patrick Liebig3, and Xin Lou1
1Department of Radiology, Chinese PLA General Hospital, Beijing, China, 2Research Collaboration Team, Siemens Healthineers, Beijing, China, 3Research Collaboration Team, Siemens Healthineers, Erlangen, Germany

Synopsis

Keywords: Blood Vessels, Brain, 7T-CEST

Motivation: The incidence of middle cerebral arterial (MCA) stenosis increases yearly, molecular biomarkers for this condition are needed. Amide proton transfer imaging is a potential imaging marker.

Goal(s): To investigate the APT changes in MCA stenosis patients.

Approach: We quantitatively evaluated both the affected and healthy middle cerebral arterial blood-supplying brain regions in eight patients with unilateral middle cerebral arterial stenosis using CEST-APT at 7T.

Results: The CEST values of the affected MCA-supplied brain regions were higher than those of the healthy MCA-supplied brain regions, suggesting metabolic alterations in patients with MCA stenosis.

Impact: CEST values for vascularized brain regions can be quantitatively measured using 7T-CEST and can provide new markers for mechanistic and intervention studies in patients with MCA stenosis. This can contribute to a better understanding of the pathogenesis of MCA stenosis.

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