Abstract #1325

Improving Visualization of Superficial Temporal Artery Using Segmented TOF MR Angiography at 7T

Zihao Zhang^1,2, Ning Wei^1,2, Xiaofeng Deng³, Dehe Weng⁴, Jing An⁴, Yan Zhuo¹, Xiaohong Joe Zhou⁵, and Rong Xue^1,6

¹State Key Laboratory of Brain and Cognitive Science, Beijing MR Center for Brain Research, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China, People's Republic of, ²Graduate School, University of Chinese Academy of Sciences, Beijing, China, People's Republic of, ³Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China, People's Republic of, ⁴Siemens Shenzhen Magnetic Resonance Ltd., Shenzhen, China, People's Republic of, ⁵Center for MR Research and Department of Radiology, University of Illinois at Chicago, Chicago, IL, United States, ⁶Beijing Institute for Brain Disorders, Beijing, China, People's Republic of

Time-of-Flight MR Angiography (TOF-MRA) can benefit from better contrast and higher spatial resolution using ultra-high field 7T MRI. In a segmented TOF technique at 7T, the Specific Absorption Rate (SAR) of saturation pulses was reduced to enable the suppression of venous blood signal. In this study, the TOF technique was successfully used to discriminate between the superficial temporal artery (STA) and vein (STV), and depict blood flow in tiny vessels, facilitating future applications in pre-operative assessment for STA-MCA bypass surgery.

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