Comparison of T2-weighted imaging, diffusion-weighted imaging and contrast-enhanced T1-weighted MR imaging for evaluating perianal fistulas

Publication date: Available online 31 March 2017
Source:Clinical Imaging
Author(s): Jiyeon Baik, Seung Ho Kim, Yedaun Lee, Jung-Hee Yoon
PurposeTo compare the lesion conspicuity and diagnostic performance of three imaging data sets (T2WI, combined T2WI and DWI [combined DWI], contrast-enhanced (CE)-T1WI) in assessing perianal fistulas.MethodsTwo radiologists with 7 and 15years of experience assessed 28 fistulas from 24 patients in each image set.ResultsThe lesion conspicuity was improved for only one reader after reading the combined DWI (P=0.0039) and CE-T1WI (P=0.0215). The accuracy was stationary for fistula type (reader 1, all 93%; reader 2, all 89%) or for direction of internal opening (96% for all sets; 92% for CE-T1WI).ConclusionAlthough combined DWI and CE-T1WI might improve fistula conspicuity, they showed comparable diagnostic performance to T2WI.



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