Masatoshi Hori1, Aytekin Oto1, Sarah Orrin1, Kenji Suzuki1, Richard L. Baron1
1Department of Radiology, The University of Chicago, Chicago, IL, USA
An intra-abdominal or anal fistula is condition which extends from a diseased intestinal segment to another organ or to the skin. MRI is increasingly thought to be an accurate and non-invasive imaging technique for the diagnosis of intra-abdominal or anal fistula. The purpose of this study was to determine whether the additional use of diffusion-weighted imaging (DWI) improves detection of the disease. Our results showed that fistulae appear hyperintense on DWI. Confidence scores for lesions with DWI and T2-weighted images combined or those with Gd-enhanced images and T2-weighted images combined were statistically significantly greater than those with T2-weighted images alone.