MRI for appendicitis 21/06/2016 by Bob Dunn The Appendicitis page has been updated with new test characteristics of MRI. Petkovska, I, Martin, DR, Covington, MF, et al. Accuracy of Unenhanced MR Imaging in the Detection of Acute Appendicitis: Single-Institution Clinical Performance Review. Radiology 2016;279(2):451-60.