Olivier Ernst

Needle positioning in interventional MRI procedure: real time optical localisation and accordance with the roadmap

This study presents a system designed to assist the surgeon during interventional procedures performed by magnetic resonance imaging (MRI). In order to reach the target during guidance in a double obliquity trajectory, this system provides accurate information about both the entry point and the orientation of the needle.

Impact of arterial input function selection on the accuracy of dynamic contrast-enhanced MRI quantitative analysis for the diagnosis of clinically significant prostate cancer

Using a limited temporal resolution dynamic contrast‐enhanced (DCE) magnetic resonance imaging (MRI) dataset to assess the impact of the arterial input function (AIF) choice on the transfer constant (Ktrans) to distinguish prostate carcinoma (PCa) from benign tissue.

Acute Jejunoileal Diverticulitis: Multicenter Descriptive Study of 33 Patients

OBJECTIVEnAcute jejunoileal diverticulitis is a very rare and potentially serious disease affecting mostly elderly patients. The diagnosis is based on imaging but remains underrecognized. The purpose of this study is to describe the clinical and CT features and the outcomes of patients with acute jejunoileal diverticulitis.nnnMATERIALS AND METHODSnCases of acute jejunoileal diverticulitis managed at three French hospitals November 2005 through January 2015 were identified retrospectively. The final diagnosis relied either on a clinical and radiologic data review by a panel of experts or on surgical findings. Demographic, clinical, laboratory, and 18-month outcome data were collected. CT scans were reviewed by two radiologists who reached a consensus about the presence of an inflammatory diverticulum, evidence of complications, and presence of other bowel diverticula.nnnRESULTSnWe identified 33 cases of acute jejunoileal diverticulitis in 33 patients with a median age of 78 years, including 30 (91%) patients in whom an inflammatory diverticulum was identified at the jejunum (n = 26, 87%) or ileum (n = 4, 13%). Extraintestinal gas was seen in 10 (30%) patients and extraintestinal fluid in 11 (33%) patients. Other small-bowel diverticula were visible in all 33 patients. The diverticulitis was mild and resolved with nonoperative treatment in 22 (67%) patients and was severe in the remaining 11 (33%) patients, eight of whom required emergent surgery.nnnCONCLUSIONnAcute jejunoileal diverticulitis is a rare and usually nonserious condition that chiefly involves the jejunum. A detailed CT assessment may allow nonoperative treatment.

Abdominal pain in a 22 year old woman.

Answers on p 587. nnA 22 year old woman was referred because of hepatomegaly and episodes of mild abdominal pain. She had no history of alcohol abuse and she had taken no medication (no oral contraceptive pills). She had never been transfused and had no known exposure to hepatotoxic chemicals. There was no family history of liver disease. There was hepatosplenomegaly on presentation. There was no ascites and no …