title: Comparison of T2-weighted imaging, diffusion-weighted imaging and contrast-enhanced T1-weighted MR imaging for evaluating perianal fistulas.
abstract: OBJECTIVE
  To 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.
  
  
  METHODS
  Two radiologists with 7 and 15years of experience assessed 28 fistulas from 24 patients in each image set.
  
  
  RESULTS
  The 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).
  
  
  CONCLUSIONS
  Although combined DWI and CE-T1WI might improve fistula conspicuity, they showed comparable diagnostic performance to T2WI.
authors.affiliation: Department of Radiology, Inje University College of Medicine, Haeundae Paik Hospital, Haeundae-ro 875, Haeundae-gu, Busan 612-030, Republic of Korea.
authors.forename: Jiyeon
authors.initials: J
authors.lastname: Baik
authors.affiliation: Department of Radiology, Inje University College of Medicine, Haeundae Paik Hospital, Haeundae-ro 875, Haeundae-gu, Busan 612-030, Republic of Korea. Electronic address: radiresi@gmail.com.
authors.forename: Seung Ho
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Department of Radiology, Inje University College of Medicine, Haeundae Paik Hospital, Haeundae-ro 875, Haeundae-gu, Busan 612-030, Republic of Korea.
authors.forename: Yedaun
authors.initials: Y
authors.lastname: Lee
authors.affiliation: Department of Radiology, Inje University College of Medicine, Haeundae Paik Hospital, Haeundae-ro 875, Haeundae-gu, Busan 612-030, Republic of Korea.
authors.forename: Jung-Hee
authors.initials: JH
authors.lastname: Yoon
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001003:Anal Canal; D003287:Contrast Media; D038524:Diffusion Magnetic Resonance Imaging / Q000379:methods; D005260:Female; D005402:Fistula / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D012003:Rectal Fistula / Q000000981:diagnostic imaging / Q000473:pathology*; D055815:Young Adult
chemical_list: D003287:Contrast Media
keywords: Diffusion; Fistula; Fistula-in ano; Gadolinium; Magnetic resonance imaging