In intraand extracranial arteries from cat and man (under conditions in which dilation was blocked), 5-hydroxytryptamine (5-HT) and D-lysergic acid diethylamide (LSD) produced a contraction at lower doses than that produced by tryptamine. Methysergide inhibited the S-HT-induced contraction of the extracranial arteries in a competitive manner. In intracranial arteries the inhibition comprised a ...

BACKGROUND AND PURPOSE Clinically important atherosclerotic cerebrovascular disease is mainly found in patients aged >60 years. Transcranial color-coded duplex ultrasonography (TCCD) is a relatively new technique for investigating the basal cerebral arteries; however, it is often hampered by impenetrable ultrasound windows. The aim of this study was to ascertain the as yet unknown success rate ...

BACKGROUND AND PURPOSE The spatial resolution of 3D time-of-flight MR angiography (TOF-MRA) can be improved within a reasonable examination time by combining 3T and sensitivity encoding technique. We evaluated the diagnostic performance of high-resolution 3D TOF-MRA at 3T in patients with suspected atherosclerotic steno-occlusive disease of the intracranial arteries. MATERIALS AND METHODS We ...

Vessel tracing by modeling vascular structures in 3D medical images with centerlines and radii can provide useful information for health. Existing algorithms have been developed but there are certain persistent problems such as incomplete or inaccurate vessel tracing, especially complicated beds like the intracranial arteries. We propose here a deep learning based open curve active contour mode...

Background: Dural Arteriovenous Fistula (DAVF), characterized by abnormally direct connections between meningeal arteries and veins or dural venous sinuses, is a rare subtype among the intracranial arteriovenous malformations. Although clinical manifestations of DAVF are very variable depending on locations size drainage, parkinsonism urinary incontinence rarely reported. Here, we present case ...

The present study aimed to investigate protein expression levels of intra‑ and extracranial atherosclerosis in rabbits following administration of a high‑fat diet. Rabbits were randomly divided into control (group A; n=9) and high‑fat diet (group B; n=9) groups. At week 12, tissues were sectioned from the common carotid artery (CCA) and middle cerebral artery (MCA). Pathological analysis was pe...

Abstract Background Dural sinus malformations (DSM) are rare congenital anomalies, accounting for less than 2% of all intracranial vascular malformations. Fetal MRI plays an important role in the confirmation diagnosis, prognostication, and planning treatment strategies. Here, we present a case dural malformation without thrombosis, diagnosed by prenatal ultrasound fetal MRI. In addition to thi...

The association between the formation of intracranial aneurysms and situations of increased blood flow in certain areas of the brain is well accepted today. It has been seen in association with arteriovenous malformations of the brain, carotid occlusion, and Moyamoya disease. The occurrence of aneurysms in small arteries of the skull base, with the exception of the intracavernous carotid artery...