High-resolution computed tomography in intracranial aneurysms.

High-resolution computed tomography in intracranial aneurysms is a highly valuable procedure. Its indications are as follows: to determine the presence of subarachnoid hemorrhage and to predict the location of aneurysms; to identify and characterize saccular and giant aneurysms; to assess the complications of aneurysm rupture; to evaluate operative maneuvers and postoperative complications. The technique of high resolution computed tomography consists of unenhanced and enhanced 10-mm-thick sections followed by 1.5mm thin sections through suspicious areas. A bolus of 100cc of 60% meglumine diatrizoate is given for the enhanced study. A repeat bolus of 60cc of contrast agent is administered prior to the thin sections. Direct coronal scanning and sagittal/coronal reformatting is frequently used. This review will detail the technique used in this procedure as well as present examples of the major indications listed above. This is the procedure of choice for patients suspected of having had a subarachnoid hemorrhage or harboring an intracranial aneurysm.