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Abstract #3609

Carotid T1 mapping with Muscle Referenced B1 Mapping Correction Using Variable Flip Angle Imaging without Extra Scan

Huiyu Qiao1, Shuo Chen1, Zihan Ning1, Hualu Han1, Rui Shen1, and Xihai Zhao1
1Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine Tsinghua University, Beijing, China

Carotid T1 mapping calculated by variable flip angle imaging usually needs an additional B1 mapping to correct nominal flip angle. However, B1 mapping techniques are difficult to implement in clinical settings. This study proposed a muscle referenced B1 mapping for a more accurate carotid T1 mapping using variable flip angle imaging but without an additional B1 mapping scan. The proposed muscle referenced B1 mapping could effectively adjust the B1 inhomogeneity, particularly for the B1 inhomogeneity between left and right carotid vessel walls. Furthermore, the T1 mapping with muscle referenced B1 mapping correction showed the capability of identifying the intraplaque hemorrhage.

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