Dyke award. Harmonic modulation of proton MR precessional phase by pulsatile motion: origin of spinal CSF flow phenomena
نویسندگان
چکیده
منابع مشابه
MR-gated intracranial CSF dynamics: evaluation of CSF pulsatile flow.
This article describes a new imaging method, called MR-gated intracranial CSF (liquor) dynamics, or MR-GILD. Pulsatile flow in CSF pathways is revealed by the difference between diastolic- and systolic-gated images. The images clearly demonstrate the ventricles, cisterns, and vascular structures. The dependence of CSF movement on arterial pulse transformation is analyzed, illustrative cases are...
متن کاملDyke Award
An alpha-streptococcus brain abscess was produced in five dogs and studied with magnetic resonance (MR) imaging (0.5 T) and computed tomography (CT). Non-contrastand contrast-enhanced CT scans were obtained using gadolinium diethylenetriaminepentaacetic acid (Gd DTPA) for MR imaging and meglumine iothalamate for CT scanning. Each animal was evaluated in the early and later cerebritis stages of ...
متن کاملPULSATILE MOTION OF BLOOD IN A CIRCULAR TUBE OF VARYING CROSS-SECTION WITH SLIP FLOW
Pulsatile motion of blood in a circular tube of varying cross-section has been developed by considering slip flow at the tube wall and the blood to be a non- Newtonian biviscous incompressible fluid. The tube wall is supposed to be permeable and the fluid exchange across the wall is accounted for by prescribing the normal velocity of the fluid at the tube wall. The tangential velocity of the fl...
متن کاملHarmonic Phase Flow for Tissue Motion Estimation in Tagged MR Sequences
In this work, we present a fully automated method for tissue deformation estimation in tagged magnetic resonance images (TMRI). The method consists of two main stages: in the first one, we use Gabor filter banks, tuned independently for each left ventricle level, that allows to obtain optimally filtered complex images the phase of which is a property that remains constant along the cardiac cycl...
متن کاملPhase-contrast MR imaging of the cervical CSF and spinal cord: volumetric motion analysis in patients with Chiari I malformation.
BACKGROUND AND PURPOSE Most previous MR studies of the dynamics of Chiari I malformation have been confined to sagittal images and operator-dependent measurement points in the midline. To obtain a deeper insight into the pathophysiology of the Chiari I malformation, we performed a prospective study using axial slices at the level of C2 to analyze volumetric motion data of the spinal cord and CS...
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ژورنال
عنوان ژورنال: American Journal of Roentgenology
سال: 1987
ISSN: 0361-803X,1546-3141
DOI: 10.2214/ajr.148.5.983