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Abstract #0680

Quantification of Long and Ultra-short Relaxation Times in Tissues with Ultra-short TE MR Fingerprinting (UTE-MRF)

Qing Li1, Xiaozhi Cao1, Huihui Ye1,2, Congyu Liao1, Hongjian He1, and Jianhui Zhong1

1Center for Brain Imaging Science and Technology, Key Laboratory for Biomedical Engineering of Ministry of Education, College of Biomedical Engineering and Instrumental Science, Zhejiang University, Hangzhou, China, 2State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China

Magnetic resonance fingerprinting (MRF) has been combined with ultra-short echo time technique (UTE-MRF) to enable the quantification of ultra-short T2/T2* tissues. A TE sinusoidal variation pattern is introduced to UTE-MRF acquisition to improve the ultra-short T2 detection accuracy to sub-millisecond. With the golden angle spiral acquisition and sliding window reconstruction, quantitative T1 and T2 maps of regular and ultra-short T2/T2* tissue components are acquired at 14s per slice. Since the B0 induced phase variation has been encoded into the signal evolution with variable TE, the B0 map is simultaneously obtained.

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