Cerebral venography: comparison of CT and MR projection venography.

The purpose of the study was to show equivalence or superiority of CT venography compared with the existing test of choice--MR venography--in the evaluation of dural sinus thrombosis and in the identification of cerebral veins and dural sinuses.Twenty-four patients underwent both CT and MR venography of the intracranial venous circulation. Seventeen patients were examined for suspected dural sinus thrombosis. Four patients underwent projection venography to assess tumor invasion of a major dural sinus. The remaining three patients were examined for cavernous sinus thrombosis, arteriovenous malformation, and an elevated jugular bulb. Without knowledge of the patients' case histories, two radiologists evaluated each CT venogram and MR venogram. The radiologists then arrived at a consensus regarding the absence or presence of dural sinus thrombosis. Later, the radiologists conducted a second interpretation with knowledge of the patients' clinical histories during which time MR and CT venograms were compared ...