PURPOSE The purpose of this study was to determine the utility of spiral CT in the diagnosis of brain death. METHODS Spiral CT was evaluated prospectively in 14 brain-dead patients and in 11 healthy subjects. A two-phase protocol was used. Twenty seconds after intravenous injection of a nonionic iodinized contrast medium, the CT table was drawn through the gantry at a rate of 10 mm/s while sc...

This paper presents an algorithm designed to segment veins in the periventricular region of the brain in susceptibility-weighted magnetic resonance images. The proposed algorithm is based on a Mamdani-type fuzzy rule-based system that enables enhancement of veins within periventricular regions of interest as the first step. Segmentation is achieved after determining the cut-off value providing ...

Thromboembolic complications (TECs) are clinically important sequelae of nephrotic syndrome (NS). The incidence of TECs in children is approximately 2%-5%. The veins are the most commonly affected sites, particularly the deep veins in the legs, the inferior vena cava, the superior vena cava, and the renal veins. Arterial thrombosis, which is less common, typically occurs in the cerebral, pulmon...

PURPOSE To investigate why some patients with an intracranial dural arteriovenous fistula (DAVF) with spinal venous drainage have myelopathy and others do not. METHODS We reviewed the clinical and radiologic data for 12 patients who had a DAVF with spinal venous drainage diagnosed at our institutions from 1982 to 1995. RESULTS Six patients had progressive spinal cord indications of disease ...

Unilateral selective cerebral perfusion through right brachial artery is one of the cerebral protection methods for aortic arch repair. The purpose of this study is to determine whether cerebral perfusion through contra-lateral hemisphere is adequate or not. Seventeen consecutive patients underwent aortic arch repair using low flow antegrade selective cerebral perfusion (ASCP) through right bra...

Cerebral venous thrombosis (CVT) is a relatively uncommon but serious neurologic disorder. It usually occurs in young people and is often associated with multiple prothrombotic risk factors. We describe the case of a 37-year-old healthy man presented to our attention because of cephalgia, nausea, vomit, and a partial motor seizure followed by psychomotor agitation and coma. Urgent brain compute...

Developmental venous anomalies (DVAs), previously called venous angiomas, are the most frequently encountered cerebral vascular malformations. However, DVA is considered to be rather an extreme developmental anatomical variation of medullary veins than true malformation. DVAs are composed of dilated medullary veins converging centripetally into a large collecting venous system that drains into ...

BACKGROUND AND PURPOSE Little information is available regarding the anatomy of the intracranial veins and sinuses that can be shown on MR venograms of children. The aim of this study was to determine the normal venous anatomy and anatomic variants. METHODS Fifty children who were referred for investigation of developmental delay and who had normal results of MR imaging of the brain were recr...