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Abstract #4673

The b=0 dependence of diffusion-based functional MRI signals to measure neuronal activations

Hyug-Gi Kim 1 , Geon-Ho Jahng 2 , Dal-Mo Yang 2 , Kyung-Nam Ryu 3 , Dong-Wook Sung 3 , and Woo-Suk Choi 3

1 Biomedical Enginerring, Kyung Hee University, Gyeonggi-do, Korea, 2 Radiology, Kyung Hee University Hospital-Gangdong, Seoul, Korea, 3 Radiology, Kyung Hee University Hospital, Seoul, Korea

To investigate neuronal changes depended on a b0 value on diffusion fMRI, we designed a diffusion-based fMRI sequence with two different b0 values. One DWI with b=0 s/mm2 (b0_b) was obtained during the first baseline scan and another DWI with b=0 s/mm2 (b0_a) was again obtained during the last stimulation scan. A single-shot spin echo sequence was run for trace-weighted imaging on 16 young subjects. We calculated ADC maps using b0_a and b0_b called as ADC_a and ADC_b, respectively. Results and discussion are presented.

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