Flow-related enhancement: In post-contrast MRI studies, the flow of CSF can sometimes create areas of enhancement that mimic pathology. This can be especially problematic in the evaluation of brain and spinal cord pathologies. Flow void artifact: Similar to the flow void artifact created by blood...
阻塞性脑积水CSF动力学改变临床上,对于占位压迫引起的阻塞性脑积水常规MRI和CT一般可以发现占位病变,但对于导水管狭窄或部分粘连引起的脑积水常难以发现病变,CSF动力学检查则可发现正常导水管处双向流动减弱或消失,相位流动曲线表现为不规则改变。朱晓黎...
MRISignal void phenomenonCSF pulsatile flowECG triggering (gatingIn a retrospective study of the MRI images of 289 neurosurgical patients, a loss of the signal intensity (the signal void phenomenon, SVP for short) of the cerebrospinal fluid in the mesencephalic aqueduct was observed in 77 patients...
the brain cells contract. After shrinking, the gaps between cells will widen, which is more conducive to CSF cleansing. Because it provide more space for the flow of CSF, which contains numerousglial cells(胶质细胞)tha...
al cerebrospinal fluid (CSF) stroke volume quantification with phase-contrast magnetic resonance imaging, of a large opening in the rigid cranium by a decompressive craniectomy and its subsequent closure by bone flap repositioning resulted in the arrest and subsequent restoration of aqueductal CSF flow...
Frequency analyses of CSF flow on cine MRI in normal pressure hydrocephalus. Eur Radiol 2003;13:1019 -24Miyati T, Mase M, Banno T, Kasuga T, Yamada K, Fujita H, et al: Frequency analyses of CSF flow on cine MRI in normal pressure hydrocephalus. Eur Radiol 13:1019-1024, 2003...
reduction, often used to suppress cerebrospinal fluid (CSF) flow artifacts in spinal magnetic resonance imaging (MRI), can be switched off to make the CSF flow voids within syrinx (syringomyelia) and within aqueduct [normal pressure hydrocephalus (NPH)] more obvious (thus confirming CSF flow). ...
ROIs for the BOLD signal in the gray matter were defined by two spheres with a diameter of 6.5 mm on both hemispheres (centered at the Entopalium) to include most of the telencephalon. In addition, the hippocampal formation mask was defined based on pigeon MRI atlas76. We transformed ...
Purpose: In vivo measurements of CSF and venous flow using real-time phase-contrast (RT-PC) MRI facilitate new insights into the dynamics and physiology of both fluid systems. In clinical practice, however, use of RT-PC MRI is still limited. Because many forms of hydrocephalus manifest in in...
using thin elastic tubes, which subcutaneously extend to the peritoneal space. Most shunt systems are equipped with a pump reservoir and a valve in order to allow flow control and prevent reflux. Once a patient has a shunt system implanted, he/she usually remains dependent on the system for ...