Abstract #0807
Prospective Comparison of a Contrast-Enhanced MRI Protocol with Contrast-Enhanced MDCT for the Primary Diagnosis of Acute Appendicitis in the General Population
Michael D Repplinger 1,2 , Perry J Pickhardt 2 , Douglas R Kitchin 2 , Jessica B Robbins 2 , Timothy J Ziemlewicz 2 , and Scott B Reeder 2,3
1
Emergency Medicine, University of Wisconsin
School of Medicine and Public Health, Madison, WI,
United States,
2
Radiology,
University of Wisconsin School of Medicine and Public
Health, Madison, WI, United States,
3
Medical
Physics, University of Wisconsin School of Medicine and
Public Health, Madison, WI, United States
The aim of our study was to determine the test
characteristics of an MRI protocol consisting of
unenhanced, contrast-enhanced, and DWI to diagnose
appendicitis. This was a prospective study including
patients ≥12 years for whom a CT was ordered to evaluate
for appendicitis. We enrolled 165 patients; all images
were interpreted by three radiologists. Sensitivity and
specificity (95% CI) were 95.7% (84.7-99.5%) and 88.8%
(81.4-93.6%) for unenhanced MRI with DWI, 95.7%
(84.5-99.5%) and 88.1% (80.2-93.2%) for CE-MRI, and
97.9% (88.1-100%) and 92.7% (85.9-96.4%) for CE-MDCT. We
conclude that this MRI protocol was as accurate as
CE-MDCT to diagnose appendicitis.
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