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与未转化为AD的,MCI-NC:MCI Non-converters 各 56 例),以及 70 例正常人(NC)的 T1-Weighted MRI 三维(3D)脑图像.首先提取每个脑图像的灰质来构造每个脑图像的三阶灰质张量,张量大小为95×119×102.采用张量主成分分析法(TPCA...
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
Fourteen male patients aged 53 years [46.2;59.0] suffering from ONFH were prospectively enrolled to undergo preoperative MRI and ex vivo analysis using HR-μCT. The necrotic zone on T1-weighted MRI scans was defined as total necrosis (delimited by the low-signal peripheral band) or dark ...
T1-Weighted MRI shows stage-dependent substantia nigra signal loss in Parkinson's disease. Mov. Disord. 27, 335... None 被引量: 0发表: 2012年 T1-Weighted MRI shows stage-dependent substantia nigra signal loss in Parkinson's disease Movement disordersSchwarz, 2012. T1-Weighted MRI shows stage...
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...
Sixty-two patients with widespread intrahepatic bile duct dilatation showed no intensity difference on T1-weighted and T2-weighted images ( P < .01). Segmental hyperintensity on T1-weighted images was correlated with intrahepatic cholestasis. 展开 关键词: Liver Cholestasis MRI ...
方法 回顾研究 58 例肢体骨肉瘤,将新辅助化疗前后髓腔的 MRI T1 像进行对比,记录化疗前患者的 MRI T1 像肿瘤与正常髓腔是否有清晰边界,化疗后分界是否仍清晰,不清晰出现的比例及信号变化。部分患者进行了双侧肢体 MRI 检查,对比双侧 MRI 信号的异同。获得瘤段截除标本后,对化疗后出现信号改变的部位进行病理取材...
Purpose To evaluate the efficacy of susceptibility weighted imaging (SWI) in comparison to standard T1 weighted postgadolinium contrast (T1-Gd) MRI in patients with Sturge-Weber Syndrome (SWS). Ma...
T1-weighted DCE-MRI showed that the oval lesion had a high T1-weighted signal and mild progressive enhancement, with a Type I (benign) time-signal intensity curve; the second, irregular, mass showed rapid, intense enhancement with a washout pattern or Type III (malignant) time-signal ...
-weighted images. In this case the effects of the pulse inhomogeneities vary with the tissues, which prevents the use of simpler correction techniques based on a global multiplicative bias field model. Here, the MR signal is modeled as a sum of contributions of all the tissues present in the...