INTRODUCTION Carotico cavernous sinus fistula (CCF) is an abnormal communication between the carotid artery and the cavernous sinus and is classified angiographically as dural or direct. Spontaneous CCF is a dural arterio-venous fistula at the cavernous sinus which is different from traumatic CCF or CCF associated with a ruptured aneurysm at the cavernous internal carotid artery. Cerebral angio...

BACKGROUND The purpose of this study was to assess the accuracy of oculopneumoplethysmography (OPG) for the diagnosis of carotid artery stenosis both alone and in conjunction with carotid magnetic resonance angiography (MRA). METHODS This retrospective study reviewed patients who had undergone both OPG and digital subtraction angiography (DSA, 90 patients, 174 vessels) within two weeks to det...

Contrast inherent inflow-enhanced multi-phase angiography combining multiple-phase flow-alternating inversion-recovery (CINEMA-FAIR) is an arterial-spin-labeling-based four-dimensional magnetic resonance angiography (4D-MRA) technique. Two neuroradiologists independently evaluated the depiction of the intracranial vasculatures in healthy subjects with 3T 4D-MRA using CINEMA-FAIR. Our results in...

Background 3.0T contrast enhanced whole-heart coronary magnetic resonance angiography (MRA) is a promising method for noninvasive, radiation-free detection and exclusion of obstructive coronary artery disease (CAD); however, the accuracy of this approach has not been determined in a multicenter trial. Methods An ECG-triggered, navigator-gated, inversion-recovery prepared, segmented gradient-ech...

We have worked on the measurement protocol and related image reconstruction of 4D data sets in the field of time-resolved Contrast-Enhanced Magnetic Resonance Angiography (CE-MRA). The method aims at improving the interpolation of sparsely sampled -space data. It is based on exploiting prior knowledge on the time courses (TCs) of the image pixels, when monitoring the uptake of contrast agents i...

In this paper, we propose a two-stage level set segmentation framework to extract vascular tree from magnetic resonance angiography(MRA). First, we smooth the isosurface of MRA by anisotropic diffusion filter. Then this smoothed surface is treated as the initial localization of the desired contour, and used in the following geodesic active contours method, which provides accurate vascular struc...

We propose a simple but novel data acquisition technique for whole-heart coronary magnetic resonance angiography (CMRA). In this technique, the breath-hold chasing MRA, data are collected during breath-hold intervals, with the navigation window manually adjusted to the diaphragmatic level. Compared with the conventional free breathing MRA, this method provided 33% reduction of acquisition time ...

We present a case of an arch anomaly in a 54-year-old female who was admitted to our hospital for magnetic resonance angiography (MRA) to evaluate her right-sided numbness. MRA revealed a truncus bicaroticus, right common carotid artery (CCA) originating right vertebral artery, right subclavian artery arising as the final branch of the descending aortic arch and arch originating left vertebral ...

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...

This paper deals with a new approach of registration in multimodal imaging. Modalities involved are Digital Subtracted Angiography (DSA, 2D) and Magnetic Resonance Angiography (MRA, 3D). Our approach is an hybrid one, mixing feature and intensity based approaches. This approach is based on the extraction of a anatomical referential common to both MRA and DSA. This step appears to be the “geomet...