BACKGROUND Brain-computer interfacing (BCI) applications based on the classification of electroencephalographic (EEG) signals require solving high-dimensional pattern classification problems with such a relatively small number of training patterns that curse of dimensionality problems usually arise. Multiresolution analysis (MRA) has useful properties for signal analysis in both temporal and sp...

A 29-year-old female patient visited the emergency room for whirling dizziness and hypersomnolence. She had had a cervical chiropractic manipulation two weeks before admission. She had no previous history of stroke or vasculitis. Initial diffusionweighted images showed diffusion restriction in the bilateral thalami, occipital lobes, and brain stem. Subsequent magnetic resonance angiography (MRA...

The automatic extraction of brain vessels from Magnetic Resonance Angiography (MRA) has found its application in vascular disease diagnosis, endovascular operation and neurosurgical planning. In this paper we first present a concise methodology, pros & cons of well-known vessel extraction techniques. The short survey of latest development in the area of vessel extraction by using region growing...

BACKGROUND AND PURPOSE Primary angiitis of the central nervous system of childhood (cPACNS) is a rare and ill-defined disease. In the absence of a brain biopsy, the diagnosis is based on typical clinical and imaging abnormalities. The aim of this study was to analyze systematically the MR imaging and MR angiographic (MRA) abnormalities in a large cohort of children with cPACNS. METHODS We ana...

o bjectives: to determine the diagnostic accuracy of magnetic resonance angiography (mra) compared to intra-arterial digital subtraction angiography (dsa) in detection of intracranial aneurysms in those suffering from acute subarachnoid hemorrhage (sah). m e thods: this observational diagnostic study was performed at a tertiary teaching hospital and reference center in shiraz, iran. we included...

• Performing magnetic resonance angiography (MRA) at higher fields has been demonstrated to improve the signal to noise and contrast to noise in both the brain and body applications. • Direct implementation of standard clinical protocols and acquisitions methods at 7T are insufficient to obtain the best results as increased B0 and B1+ inhomogeneity, local SAR and limited peak power present road...

BACKGROUND AND PURPOSE MR angiography (MRA) is increasingly used as a noninvasive imaging technique for the follow-up of coiled intracranial aneurysms. However, the need for contrast enhancement has not yet been elucidated. We compared 3D time-of-flight MRA (TOF-MRA) and contrast-enhanced MRA (CE-MRA) at 3T with catheter angiography. MATERIALS AND METHODS Sixty-seven patients with 72 aneurysm...

Discussion Our patient has a vascular lesion of the brain which looks like an AVM though the images do not clearly demonstrate the nidus of the AVM. Th e ‘snake’ is actually the large draining vein and not the AVM nidus. Giant AVMs are diffi cult to treat and oft en carry higher treatment morbidity and mortality rates than do smaller ones. Patients Dear Sir, A 45-year-old male presented to our ...