OBJECTIVE: To quantify signal intensity and to correlate intramedullary signal changes on MRI T1- and T2-weighted images (WIs) with clinical outcome and prognosis. METHODS: Retrospective case study. METHODS: Patients (n=148; cervical spondylotic myelopathy, n=102 and ossified posterior longitudinal li...
High-resolution T1-weighted images were acquired using spoiled gradient recalled sequence on a 3 T MRI system (Tim Trio; Siemens,Erlangen, Germany) with an eight-channel head coil at West China Hospital. The main ...
核磁共振成像MRI造影剂可以分为纵向弛豫造影剂 (T1制剂)和横向弛豫造影剂(T2制剂)。T1制剂是通过水分子中的氢核和顺磁性金属离子直接作用来缩短T1,从而增强信号,图像较亮;T2制剂是通过对外部局部磁性环境的不均匀性进行干扰,使邻近氢质子在弛豫中很快产生相(diphase)来缩短T2,从而减弱信号,图像较暗。 弛豫效率是MR...
通常情况下，t1和t1增强可以指两种不同的医学检查方法，即核磁共振成像（MRI）中的两种不同扫描方式。让我简单解释一下这两种扫描方式的区别。T1加权成像（T1-weighted imaging）是MRI扫描的一种，它通过对组织中的质子进行特定的处理以提供对组织结构和解剖的详细信息。在T1加权成像中，脑脊液和脂肪组织呈...
Higher MRI resolution typically comes at the cost of signal-to-noise ratio (SNR) and tissue contrast, particularly for more common 3 Tesla (3T) MRI scanners. At ultra-high magnetic field strength, 7 Tesla (7T) MRI allows for higher resolution with greater tissue contrast and SNR. However,...
体素内不相干运动扩散加权成像(intravoxel incoherent motion-diffusion weighted imaging,IVIM-DWI)是一种可以同时评估组织水分子扩散情况和微循环灌注情况的双指数模型MRI新技术,能够将真性扩散系数(D)和假性扩散系数(D*)分离并量化[5]...
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...
According to the theory of MRI, three imaging modes exist, namely, T 1 -weighted imaging,T 2 -weighted imaging and diffusion weighted imaging. Accordingly, there are two types of exogenous MRIcontrast agents, namely T 1 contrast agent and T 2 contrast agent, for improvement in contrast in ...
resonancenuclearmagnetic核磁共振differenceweighted 核磁共振t1与t2区别(NuclearmagneticresonanceT1andT2difference)Nuclearmagneticresonance(T1)isdifferentfromT2(somebasicMRIknowledge,that'sright!Source:logofPhoebetreeSource:Lisetsail1,T1observationanatomicalstructureisbetter.2andT2showedthatthelesionswerebetter.3,water...
英语翻译我现在在国外,腰疼,医生让我爸腰部做了MRI检查,报告内容如下:MRI Technique:Sagittal T1 and T2-WI’sAxial T1 and T2-WI’sNo contrast was givenMRI Findings:Maintained alignment of the vertebrae with straightenin