Collateral circulation plays an important role in protecting brain tissue from ischemic damage acute cerebral artery occlusion, and various imaging modalities are used to evaluate collateral circulation. Angiographic techniques, such as digital subtraction angiography multiphase computed tomography (CT) angiography, directly show Meanwhile, hyperintense vessels on f luid-attenuated inversion re...

An amenable, analytical two-state description of the nonlinear population dynamics of a noisy bistable system driven by a rectangular subthreshold signal is put forward. Explicit expressions for the driven population dynamics, the correlation function (its coherent and incoherent parts), the signal-to-noise ratio (SNR), and the stochastic resonance (SR) gain are obtained. Within a suitably chos...

Objective: The clinical value of IgG anticardiolipin antibody in patients with Behçet's disease with or without vascular thrombosis was evaluated.   Methods: IgG isotype of anticardiolipin (aCL) antibody was assessed in 40 Behçet's disease (BD) patients with venous or arterial thrombosis, 40 BD patients without venous or arterial thrombosis and 80 healthy subjects as controls. The levels of IgG...

objective: the clinical value of igg anticardiolipin antibody in patients with behçet's disease with or without vascular thrombosis was evaluated.   methods: igg isotype of anticardiolipin (acl) antibody was assessed in 40 behçet's disease (bd) patients with venous or arterial thrombosis, 40 bd patients without venous or arterial thrombosis and 80 healthy subjects as controls. the lev...

BACKGROUND AND PURPOSE Prominent posterior cerebral artery (PCA) laterality upon 3-dimensional time-of-flight magnetic resonance angiography is often encountered in patients with middle cerebral artery occlusion. We hypothesized that this sign is correlated with improved functional outcome in patients with middle cerebral artery occlusion treated with intravenous recombinant tissue plasminogen ...

Abstract Background Intracranial atherosclerosis, one of the leading causes ischemic stroke, is associated with an increased risk for recurrent stroke and dementia. Objective This work was carried out to assess suspicious lesions detected by Magnetic Resonance Angiography (MRA) Computed Tomgraphy (CTA) further evaluation vessel wall MRI . Patients methods study conducted on 16 patients who were...

Magnetic resonance imaging has assumed an increasingly important role in the diagnosis and monitoring of patients with ischaemic heart disease. For patients presenting with acute chest pain, it is essential to diagnose acute coronary syndrome and to treat these patients as soon as possible. Recent studies have shown that cine magnetic resonance imaging and magnetic resonance perfusion are feasi...

Intracranial vascular variations involving the middle cerebral artery are rarely seen. Herein, we report an 11-year-old girl with incidental bilateral accessory middle cerebral arteries, an extremely rare variation, which is the first case in the related literature demonstrated by cranial magnetic resonance imaging and magnetic resonance angiography.

Copyright © 2007 Massachusetts Medical Society. A 51-year-old woman presents with a generalized tonic–clonic seizure. After a brief postictal period, she recovers fully and does not report headache or other neurologic symptoms. She takes no medications and her medical history is unremarkable. Computed tomography of the head suggests a right occipital arteriovenous malformation, without evidence...