EXAM:MRI BRAIN without and with contrast 40/5000 源语言: 英语 目标语言: 简体中文 结果(简体中文) 1: [复制] 考试:没有和有对比的MRI脑 结果(简体中文) 2:[复制] 考试:无和对比的MRI大脑 结果(简体中文) 3:[复制] 无脑磁共振造影其它语言...
Magnetic resonance imaging (MRI) as a clinical investigation became available in the early 1980s. Since then this method has proven to be a valuable additional diagnostic tool in the recognition and delineation of space-occupying lesions of the brain (1, 2, 3, 5). In the present study the...
However, what this is remains a mystery. One suggestion is that sleep clears the brain of metabolites and toxins using the ‘glymphatic’ system, a process that cannot operate efficiently during the waking state3,4. This attractive idea has important implications. For example, diminished toxin ...
For the initial imaging of an acute or progressively worsening mental status change in a patient with a known intracranial process (mass, recent hemorrhage, recent infarct, central nervous system infection, etc), CT head without IV contrast, MRI head without and with IV contrast, or MRI head ...
Brain imaging technologies, including functional MRI (fMRI), PET, EEG and magnetoencephalography (MEG), have the potential to provide objective measurements of patterns of brain activity that underlie perceptual experiences (Box 1). Consequently, some people are looking to brain imaging to provide a...
with contrast-enhanced T1 MRI. Indeed, MRgFUS has been widely used to enhance anti-cancer drug delivery to pediatric brain tumors in mice [87] or polymeric nanoparticles in healthy rats [35,88]. One concern with FUS BBB opening is the need to titrate the energy of FUS and the dose of...
The question then remains what amount of enlargement should distinguish physiologic from nonphysiologic perivascular spaces? Originally, a convenience threshold was chosen such that any perivascular space visible on brain MRI was considered enlarged. However, increasing field strengths and other advances in...
When is a bank not a bank? Or, what's right and what's left “He did as he was told, put all of the money into a plain brown paper bag, and took the bag to the right bank, only to find the abductors waiting across the Seine river on the south side. ‘Never again,’ he mu...
For the first time, we performed a DSC-MRI perfusion analysis using a breath-hold task, without exogenous contrast or additional medical device equipment. We have found the following: The AIF during a breath-hold task is uniquely characterized by a negative signal change, likely representing vasod...
While the link between brain structure and function remains an ongoing challenge, the prevailing hypothesis is that the structure-function relationship may itself be gradually decoupling from unimodal to transmodal cortex. However, this hypothesis is con