نتایج جستجو برای: lesions volume
تعداد نتایج: 476769 فیلتر نتایج به سال:
OBJECTIVE White matter lesions are often seen on MR scans of elderly non-demented and demented people. They are attributed to degenerative changes of small vessels and are implicated in the pathogenesis of cognitive decline and dementia. There is evidence that especially periventricular white matter lesions are related to cognitive decline, whereas subcortical white matter lesions may be relate...
Previous studies have established regional gray matter (GM) volume loss in multiple sclerosis (MS) but the relationship between development of white matter (WM) lesions and changes of regional GM volumes is unclear. The present study addresses this issue by means of voxel-based morphometry (VBM). T1-weighted three-dimensional magnetic resonance imaging (MRI) data from MS patients followed up fo...
Introduction: Dynamic contrast-enhanced (DCE) breast MRI has been shown to be very sensitive in cancer detection [1,2]. Most malignant tumors demonstrate an initial enhancement followed by a rapid wash-out (WO) or plateau curve in the post-contrast signal intensity time courses. The WO curve mainly reflects the hypervascularity associated with tumor angiogenesis essential for tumor growth [3-5]...
This retrospective and exploratory study investigated the efficiency of 3T perfusion magnetic resonance imaging (MRI) at classification MS lesion subtypes. For subtype classification, firstly, it was necessary to segment all lesions. Therefore, a Bayesian classifier based on adaptive mixture method used lesions, an artificial neural network (ANN) employed multi-layer Perceptron as classifier. T...
An assessment has been made of the histopathological characteristics of latent prostatic carcinoma and the tumor volume in 500 male Japanese patients who underwent dissection at The Jikei University since 1983. A microscopic observation was made of the prostatic glands extirpated totally at the necropsy, fixed with formalin and prepared as a step-section in a thickness of 3 mm. In the cases of ...
It is well established that plasma lipoproteins enter the artery wall and play a role in the atherogenic process. However, it is still unclear where within developing atherosclerotic lesions lipoproteins accumulate and which arterial cells participate in the metabolism of these lipoproteins. For this reason, light and electron microscopic autoradiograms were prepared from sections of lesioned a...
BACKGROUND AND PURPOSE Lesion volume on diffusion-weighted magnetic resonance imaging (DWI) before acute stroke therapy is a predictor of outcome. Therefore, patients with large volumes are often excluded from therapy. The aim of this study was to analyze the impact of endovascular treatment in patients with large DWI lesion volumes (>70 mL). METHODS Three hundred seventy-two patients with mi...
BACKGROUND AND PURPOSE The shape and exact size of lacunar infarcts have been investigated only postmortem. Recent imaging techniques based on triangulation and connectivity can now be used for 3D segmentation of cerebral lesions. The shape and size of lacunar infarcts was investigated using these techniques in 10 cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencep...
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