By subtracting the mean value of cerebrospinal fluid (CSF) from the mean value of grey and white matter, it is possible to remove most of the errors due, for example, to maladjustments, short and long-term drift, X-ray fan, and detector asymmetry. Measurements of white and grey matter ...
local bony hyperostosis, corticomedullary buckling, displacement of the cortex away form the bone, preservation of the grey/white matter junction and widening of the cisterns. Meningiomas are located in a supratentorial location in about 90% of cases,...
since demyelination and axonal loss contribute to post-stroke disability. In this study, we describe a protocol to quantify microstructural differences and integrity of white fibers, and to quantify white matter volume vs grey matter11,12.
The CT scan of the brain was performed without contrast and the images were reviewed. The following findings were noted: - Acute infarction in the left middle cerebral artery (MCA) territory with loss of grey-white matter differentiation. - Hypodensity in the left basal ganglia, left insular ...
以脑灰质和脑白质的平均灰度值为两个转折点, 对图像的灰度进行拉伸, 以增强图像的灰白质对比。 结果38例患者的正常脑平扫图像, 经灰度值非线性变换法处理后, 两转折点处灰度值差值较原始图像增加了1. 5个像素值( O<AR≤3); 脑灰质和脑白质对比度也明显提高; 灰白质分界更加清楚; 且处理后图像与原始...
The discrepancy in volumes between various SW is due to differences in acquisition techniques, contrast agent delivery, thresholds for calculation of the ischemic core and penumbra, reference values for grey and white matter, differences in post-processing steps such as smoothing, and defining arterial...
The brain consists of grey and white matter. It1(weigh) just over 1 kilo. It uses 20% of the body’s energy.2(connect) by electrical impulses, the nerve cells are over 100 billion in number. There are more possible connections in one brain than there are atoms in the universe. Scient...
Better prognostic value with combined optic nerve sheath diameter and grey-to-white matter ratio on initial brain computed tomography in post-cardiac arrest patients[J]. Resuscitation, 2016,104:40-45. doi: 10.1016/j.resuscitation.2016.04.001 . 返回引文位置Google Scholar 百度学术 万方数据 [18] ...
In addition, SPM12 (Wellcome Centre for Human Neuroimaging, London, UK) was used to segment the MRI image into grey (GM) and white matter (WM). Subsequently, the GM cerebellum was used as a reference region to calculate the influx constant kicer (min-1; from here on labelled as kicer...
If the blood flow is not restored then the penumbral tissue will proceed to infarction and the original core lesion will grow to occupy a larger part of the brain with possibly much greater functional disability than if less tissue had been permanently damaged. Since the 1970s, salvage of ...