CT perfusion angiography; beware of artifacts!

Diagnosing brain death by CT perfusion and multislice CT angiography.

INTRODUCTION Although the diagnosis of brain death (BD) is usually based on clinical criteria, in sedated patients, ancillary techniques are needed. This study was designed to assess the accuracy of cerebral multislice computed tomographic angiography (CTA) and CT perfusion (CTP) in diagnosing BD. METHODS Prospective observational study in 27 BD patients. RESULTS All patients were diagnosed...

Minimizing clip artifacts in multi CT angiography of clipped patients.

PURPOSE To optimize the multi CTA (MSCTA) protocol, the influence of pitch, kilovoltage peak (kVp), reconstruction algorithm, type, and orientation of the clip on clip-induced artifacts was investigated in a phantom study. Also, the influence of kVp, concentration of contrast material, and clip orientation in clipped patients was studied. METHODS A phantom containing a clip was scanned with v...

Certainty of stroke diagnosis: incremental benefit with CT perfusion over noncontrast CT and CT angiography.

PURPOSE To systematically evaluate the diagnostic benefits and inter- and intraobserver reliability of an incremental computed tomographic (CT) protocol in the confirmation of clinically suspected stroke, with combined imaging and clinical data as the reference standard. MATERIALS AND METHODS Institutional review board approval was obtained, and participants gave informed consent. A total of ...

Flat panel detector CT, CT angiography, and CT perfusion in stroke.

Acute stroke imaging: CT with CT angiography and CT perfusion before management decisions.