Intra-arterial thrombus visualized on T2* gradient echo imaging in acute ischemic stroke.

Background: MR signal loss related to arterial thrombosis leading to vascular susceptibility artifacts (VSA) has recently been reported on gradient echo images. The time course and sensitivity of VSA in acute stroke patients has been scarcely investigated. The aim of this study was to assess the frequency and course of VSA in acute stroke patients, to compare its sensitivity to distinct features of arterial occlusion as detected on FLAIR images or on CT scan.

[Pneumatocyst of the sacrum. Apropos of a case].

We report a new case of asymptomatic pneumatocyst of the sacrum in a 45-year-old man with a history of lumbago. Pneumatocysts are rare benign osseous lesions filled with gas and always found in the subchondral bone of the sacral or iliac side of the sacroiliac joint. The diagnosis is made by CT scan.

[Computed tomography diagnosis of pancreatic abscess and its surgical drainage].

In a retrospective study of 40 patients with acute necrotizing pancreatitis, 16 developed abscesses. The follow-up CT Scan and a radio-surgical cooperation permitted an early diagnosis of pancreatitis and time of surgical act. The 16 abscesses had surgical drainage, 5 patients died.