in this article, dynamics of the cerebrospinal fluid (csf) was studied, using computational fluid dynamics. using mri images of two special cases, a 2-dimensional model of the ventricular system was made. csf velocity and pressure distribution in ventricular system have high importance since the flow pattern of this liquid has an important effect on intracranial pressure, i.e., icp, which has a...

The aim of this study was to evaluate the application of phase-contrast cine magnetic resonance imaging (MRI) in endoscopic aqueductoplasty (EA) for patients with obstructive hydrocephalus. The clinical diagnosis of hydrocephalus caused by aqueduct obstruction in 23 patients was confirmed by phase-contrast cine MRI examination. The patients were treated with EA and MRI was repeated during the f...

OBJECTIVE To evaluate whether the results of cerebrospinal fluid (CSF) flow quantification differ according to the anatomical location of the cerebral aqueduct that is used and the background baseline region that is selected. MATERIALS AND METHODS The CSF hydrodynamics of eleven healthy volunteers (mean age = 29.6 years) were investigated on a 1.5 T MRI system. Velocity maps were acquired per...

PURPOSE The aim of this study was cerebrospinal flow quantification in the cerebral aqueduct using cine phase-contrast magnetic resonance imaging (MRI) technique in both sexes and five different age groups to provide normative data. MATERIALS AND METHODS Sixty subjects with no cerebral pathology were included in this study. Subjects were divided into five age groups: < or =14 years, 15-24 yea...

b a c k ground: csf is a clear liquid that its mechanical properties are to a large extent similar to water properties. regarding the lack of a numerical index for diagnosis of diseases resulting from increased csf pressure such as hydrocephalus, evaluation of hydrodynamic conditions of csf in cerebral ventricular system is of great importance. methods: at first, the diagram of velocity in sylv...

Objective. To share our experience of cerebrospinal fluid gusher in cochlear implantation in patients with enlarged cochlear or vestibular aqueduct. Study Design. Case series with comparison and a review of the literature. Methods. A retrospective study was performed. Demographic and radiological results of patients with enlarged cochlear aqueduct or enlarged vestibular aqueduct in 278 consecut...

OBJECTIVES To review the controversial aspects of the enlarged vestibular aqueduct syndrome. STUDY DESIGN Contemporary review. METHODS A literature search using the terms "enlarged vestibular aqueduct and large vestibular aqueduct" were used to generate the articles for review in this article. RESULTS The enlarged vestibular aqueduct is a condition causing variable auditory and vestibular...

B. Ozgen M.E. Cunnane P.A. Caruso H.D. Curtin BACKGROUND AND PURPOSE: Measurement of the vestibular aqueduct on CT scans of the temporal bone is important for the detection of large vestibular aqueduct syndrome; typically this is done in the axial plane. We sought to determine the usefulness of reformats performed in the 45° oblique plane for evaluating the vestibular aqueduct. In addition, we ...

Aqueduct, one kind of bridge structure overpassing a long space, is significant for water delivery the purpose agricultural or domestic usage. Aqueduct has quite different loads from other forms bridges, which temperature effects due to environment change, such as seasonal weather radiation sunshine, are great importance. With flowing inside, boundary aqueducts, especially steel much more compl...

Eighteen infants and children with typical congenital hydranencephaly were studied by pneumoen cephalography, water-soluble contrast ventriculography, and cisternography (radioisotope or metri zamide). Pneumoencephalography and ventriculography suggested that the aqueduct was obstructed or markedly stenotic in all cases. Cisternography demonstrated blocks at the aqueduct and at the level of the...