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Abstract #4128

Perianal Imaging in Pediatric IBD - 1.5T versus 3T

Mary-Louise C Greer 1,2 , Zehour Alsabban 1 , Ryan Lo 3 , Rahim Moineddin 4 , Peter Church 5 , Thomas D Walters 3,5 , Jacob C Langer 3,6 , and Anne Griffiths 3,5

1 Diagnostic Imaging, The Hospital for Sick Children, Toronto, Ontario, Canada, 2 Medical Imaging, University of Toronto, Toronto, Ontario, Canada, 3 University of Toronto, Ontario, Canada, 4 Department of Family and Community Medicine, Dalla Lana School of Public Health University of Toronto, Ontario, Canada, 5 Gastroenterology, Hepatology and Nutrition, The Hospital for Sick Children, Ontario, Canada, 6 Division of General Surgery, The Hospital for Sick Children, Ontario, Canada

Hypothesizing pelvic MRI in children is comparable in detecting perianal disease when performed at 1.5T and 3T, 133 pelvic MRI performed using standard perianal technique at 1.5T and/or 3T in 94 children with pediatric inflammatory bowel disease (PIBD) were retrospectively reviewed by two radiologists for perianal fistulae and abscesses. Similar frequencies, types and location of perianal disease were detected in both groups, validating imaging at either field strength. A secondary aim, describing frequency of perianal fistula types in PIBD using Parks criteria, demonstrated a different frequency of fistula type in children compared with adults, all either trans-sphincteric or inter-sphincteric.

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