Abstract #0808
Diffusion and Post Contrast MFAST imaging for Evaluation of Acute Appendicitis: The Stanford Experience
Alex Lewis 1 , Mathew Bernbeck 1 , Richard Barth 1 , and Shreyas Vasanawala 2
1
Radiology, Stanford University, Stanford,
CA, United States,
2
Stanford
University, Stanford, CA, United States
All pediatric appendicitis MRIs from 1/2014 to 9/2014
with diffusion and post contrast sequences at our
institution were retrospectively identified and
randomized into two groups (36 each). All studies were
scored by three readers of varying experience with
appendicitis MRI for delineation of the appendix,
confidence of assessment of acute appendicitis and
perforation/abscess after each series. Appendicitis was
present in 18/72 (25%) cases and complication in 6/72
(8%). An appendix or appendiceal candidate was
identified in 36, 18 and 56% of cases for readers 1, 2
and 3 respectively with SS, increasing to 89, 36 and
100% for SS+CE, and 53, 19 and 100% for SS+DW.
Sensitivity and specificity of detection of appendicitis
and perforation/abscess were also evaluated. Results
demonstrate that both DWI and contrast enhanced imaging
increase performance of MRI for diagnosis of
appendicitis.
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