MRI of Fistula In Ano: Inter- and Intraobserver Agreement and Effects of Directed Education
Gordon N. Buchanan1,
Steve Halligan2,
Stuart Taylor2,
Andrew Williams1,
Richard Cohen1 and
Clive Bartram2
1 Department of Surgery, St. Marks Hospital, Intestinal Imaging, Middlesex,
England.
2 Intestinal Imaging Centre, St. Marks Hospital, Level 4V, Watford Rd., Harrow,
Middlesex, England HA1 3UJ.

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Fig. 1. Axial STIR MR image obtained at mid anal canal level in
41-year-old man in whom expert observer correctly identified intershpincteric
fistula in ano (arrow). Location was misclassified as
transsphincteric by novice before directed education.
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Fig. 2. Axial STIR MR image obtained at mid anal canal level in
36-year-old woman in whom both expert and novice observers correctly
identified transsphincteric fistula in ano associated with ischiorectal
extension (arrow) after period of directed education.
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Copyright © 2004 by the American Roentgen Ray Society.