background: fetal color doppler is important for evaluation of hypoxia in intrauterine growth restriction (iugr) fetus. objective: in this study we compare fetal and maternal color doppler with blood gas analysis to detect fetal acidosis. materials and methods: in this cross-sectional study we evaluated 100 hospitalized patients with iugr for comparison of color doppler results with arterial bl...

An accessory middle cerebral artery (AMCA) is a variation of the cranial vascular system. It usually originates from the anterior cerebral artery, particularly from its proximal part and supplies the orbitofrontal and prefrontal regions of the territory of the middle cerebral artery (MCA). It is reported in approximately 3% of dissections (Teal et al., 1973; Yasargil, 1984; Umansky et al., 1988...

A 37 year old woman was admitted to the department of neurosurgery because of severe headache during sexual intercourse 4 weeks earlier. Cerebral MRI showed an aneurysm of the left middle cerebral artery which had caused a subarachnoid haemorrhage. Transcranial 2 MHz duplex sonography (Logiq 500, General Electrics) disclosed an aneurysm at the ramification of the middle cerebral artery into the...

BACKGROUND The aim of this study is to provide better insights into the cerebral perfusion patterns and collateral mechanism of the circle of Willis (CoW) under anatomical and pathological variations. METHODS In the current study, a patient-specific three-dimensional computational model of the CoW was reconstructed based on the computed tomography (CT) images. The Carreau model was applied to...

Background: The aim of this study is to provide better insights into the cerebral perfusion patterns and collateral mechanism of the circle of Willis (CoW) under anatomical and pathological variations. Methods: In the current study, a patient-specific three-dimensional computational model of the CoW was reconstructed based on the computed tomography (CT) images. The Carreau model was applied to...

AIM To describe a reconstructive technique using single stent for wide-necked aneurysms. MATERIAL AND METHODS This technique was described as stent-jail technique consisting of the aneurismal catheterization before the deployment of a self-expandable stent across the aneurysm neck. Following the deployment of the stent, embolization coils were delivered with the microcatheter positioned withi...