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Abstract #4974

Diffusion-weighted MR Enterography imaging of the ileocecal segment: optimizing b-value for visually differentiating inflammatory and neoplastic lesions

Hao Yu1, Daoyu Hu1, Yaqi Shen1, Zhen Li1, Jianjun Li1, Zi Wang1, and Yanchun Wang1

1Department of Radiology, Tongji Hospital Tongji Medical College Huazhong University of Science and Technology, Wuhan, People's Republic of China

To evaluate the ability of conventional MR Enterography (MRE) including coronal and axial T1/T2 weighted imaging and Diffusion-weighted imaging with different b-values(b=400,600,800,1000,1200,1500,3000 sec/mm2)to visually illustrate inflammatory lesions and neoplastic lesions in the ileocecal region comparing with colonoscopy or surgical results.As a result,MRE and DWI were capable of revealing the lesions in the ileocecal segment. DWI was superior to detect lesions especially inflammations comparing with conventional MRE, and the optimal b value of DWI for MRE was 800 sec/mm2 at 3T. Hyperintensity of ileocecal lesion on DWI with high b(﹥1000 sec/mm2) value wes more favor for tumor-like lesion.

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