MRI图像若主要反映的是组织间T1值差别,为T1加权像(T1weighted image,T1WI);如主要反映的是组织间T2值差别,为T2加权像(T2weighted image,T2WI);如主要反映的是组织问质子密度弛豫时间差别,为质子密度加权像(proton density weighted image,PdWI)。人体不同组织及其病变具有不同的T1、T2值和质子密度弛豫时间,因此,在...
This study explores the application of texture analysis on T1-weighted MRI in patients with amyotrophic lateral sclerosis, stratified by the D50 disease progression model. The D50 model, which offers a more nuanced representation of disease progression than traditional linear metrics, calculates the ...
在MR斑块成像中识别斑块的远端 (DEMRI),并测量与基线的距离 (DistanceMRI)。术中根据MR斑块成像测量,在ICA上标记颈动脉斑块重叠远端 (Esim)。然后在动脉切开后识别斑块的实际远端 (DECEA),并测量Esim和DECEA之间的差异 (DifferenceCEA-MRI)。使用MR斑块成像计算颈动脉斑块的对比度和ICA的弯曲度。结果: 观察者间...
为了识别阿尔兹海默症与轻度认知障碍患者,本文提出了一种基于支持张量机(STM)的分类器,以T1加权MRI脑图像灰质灰度为特征的诊断方法.该分类器以三维(3D)的脑灰质图像作为模型输入,用STM迭代算法训练分类器每一模的权向量进而进行分类.采集了 70例AD患者,112例MCI患者(包含在随访中转化为AD的,MCI-C:MCI Converters与...
T1-weighted MRI as a substitute to CT for skull aberration correction in transcranial focused ultrasound: in vivo feasibility and in vitro comparison on hu... T1-weighted MRI as a substitute to CT for skull aberration correction in transcranial focused ultrasound: in vivo feasibility and in vitro...
Magnetic resonance imaging (MRI), which offers a number of advantages such as unlimited tissue penetration, zero ionizing radiation, and a noninvasive nature, has received considerable attention over the past two decades as a technique for clinical diagnosis. To improve imaging sensitivity, contrast ...
T1-Weighted MRI shows stage-dependent substantia nigra signal loss in Parkinson's disease. Mov. Disord. 27, 335... - 《Movement Disorders》 被引量: 1发表: 2012年 MRI can detect nigral volume loss in patients with Parkinson's disease: evidence from a meta-analysis. Parkinson's disease (PD...
In this study, we developed an AD classification algorithm based on 2D slices of T1-weighted MRI images that include AD-sensitive brain regions from two independent populations with different ethnic and demographic backgrounds. We cross-validated the results between the two populations. Results Per-pe...
百度试题 结果1 题目T1WI:MRI的图像如主要反映组织间T1的差别,为T1加权像,即T1 weighted image,T1WI。相关知识点: 试题来源: 解析 普通CT图像的空间分辨率不如X线图像高,但具有更高的密度分辨力。反馈 收藏
Segmental hyperintensity on T1-weighted MRI of the liver: Indication of segmental cholestasis 来自 掌桥科研 喜欢 0 阅读量: 27 作者:T Gabata,O Matsui,M Kadoya,J Yoshikawa,K Ueda,Y Kawamori,T Takashima 摘要: The purpose of this study was to determine the relationship between segmental ...