نتایج جستجو برای: brain volumetry
تعداد نتایج: 474097 فیلتر نتایج به سال:
Many brain morphometry studies have been performed in order to characterize the brain atrophy pattern of Alzheimer's disease (AD). The earliest studies focused on the volume of particular brain structures, such as hippocampus and entorhinal cortex. Even though volumetry is a powerful, robust and intuitive technique that has yielded a wealth of findings, more complex shape descriptors have been ...
OBJECTIVES We hypothesize that the combined use of MRI cortical thickness measurement and subcortical gray matter volumetry could provide an early and accurate in vivo assessment of the structural impact of cardiac arrest and therefore could be used for long-term neuroprognostication in this setting. DESIGN Prospective cohort study. SETTING Five Intensive Critical Care Units affiliated to t...
OBJECTIVE To assess auditory processing, hearing difficulties, and brain magnetic resonance (MR) imaging abnormalities in children with panocular developmental aniridia due to PAX6 mutations. DESIGN Case-control study. SETTING Great Ormond Street Hospital and Institute of Child Health. PARTICIPANTS Eleven case subjects with PAX6 mutations and 11 age-matched and sex-matched healthy control...
Background: Chronic inflammatory diseases of the CNS such as Multiple Sclerosis (MS) lead to demyelinization and to widespread degradation of neurons and axons. The loss of neurons and axons alters the mechanical structure and therefore the elasticity of the brain, a process which may be useable for early recognition of diffuse pathological degeneration [1]. Problem: Current knowledge of biomec...
The present study investigated the range of age-related changes in brain morphology and the relation with performance on memory and other cognitive tests in a healthy population. A group of 61 subjects (21 to 81 years old, mean 5 55.7), free from cognitive and medical deficits, underwent MRI scanning and neuropsychological assessment encompassing memory and other cognitive tests. Volumetry of t...
INTRODUCTION Autologous fat transplantation to the female breast is becoming generally accepted as a standard procedure in plastic surgery. Periglandular planes and also intrapectoral planes are used, based on the idea of having a highly vascularised matrix. To assess this surgical technique a reproducible and exact tool for volume analysis is necessary. METHODS The volume of pectoral muscles...
OBJECT Unlike whole-brain radiation therapy, Gamma Knife surgery (GKS) is delivered in a single session for the treatment of brain metastases. The extent to which GKS can facilitate early tumor control was the focus of this study. METHODS The authors reviewed 134 metastatic lesions in 82 patients treated with GKS at the University of Virginia who underwent follow-up MR imaging within 30 days ...
We evaluate the accuracy and precision of different techniques for measuring brain volumes based on MRI. We compare two established software packages that offer an automated image analysis, EMS and SIENAX, and a third method, which we present. The latter is based on the Interactive Watershed Transform and a model based histogram analysis. All methods are evaluated with respect to noise, image i...
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