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Because of the existence of bad pixels in the detector of Fourier transform imag ing spectrometer (IFTS), distortion in the recovering spectra was emerged. 由于傅里叶变换成像光谱仪探测器中坏像元的存在,使得复原光谱产生失真。
Functional magnetic resonance imaging (fMRI) have been widely used to lbrain check,especially diffusion weighted imaging(DWI)and diffusion perfusion weighted imaging(PWI). 功能磁共振成像已比较广泛地用于颅脑检查,尤以磁共振弥散加权像(DWI)和灌注加权像(PWI)应用较多。
Application of functional magnetic resonance diffusion weighted imaging(DWI) and perfusion weighted imaging(PWI) MRI can diagnose early acute cerebral infarction. 功能MR弥散加权成像(DWI)和血流灌注成像(PWI)磁共振技术的应用可诊断早期脑梗死,结合DWI和PWI可以确定缺血半暗带和血流灌注情况;
As new technologies of magnetic resonance imaging, diffusion weighted imaging (DWI) and diffusion tensor imaging (DTI) have been applied in clinical diagnosis. 磁共振扩散加权与弥散张量成像作为磁共振成像新技术已经应用于临床。
Diffusion perfusion weighted imaging (PWI) can provide more useful information in superacute stage,of which the changes in perfusion imaging is earlier than that of DW1. PWI能在超急性阶段提供非常有用的信息,在超早期脑缺血性卒中灌注图像改变要先于DWI图像改变。
Methods The exposure dose, imag ing time and image quality were compared in the two digital imaging system. 方法对两种数字化成像系统的曝光剂量、成像时间和图像质量进行比较分析。
Methods Four sequences of conventionality and PROPELLER axial T_2-weighted imaging (T_2WI) and/or diffusion weighted imaging (DWI) were performed in ten normal volunteers with head ceaseless motion and 64 clinical subjects. 方法对10例健康志愿者在头部晃动状态下、64例头颅MR检查中出现躁动不合作或口腔有固定金属异物的患者,应用propeller技术进行T2WI和(或)扩散加权成像(DWI),与常规T2WI和(或)DWI进行对比。
MR diffusion weighted imaging ( DWI) in vivo detects the microscopic diffusion of molecular in the tissue by special MR series . It has the advantage of fast imaging and easy processing. 磁共振弥散加权成像(Diffusion Weighted Imaging，DWI)能够检测活体组织中分子的微观弥散运动，具有成像速度快，后处理简便快捷等优点。
The following tables are a general guide to how tissue appears on T1- or T2- weighted images. 以下是一个各种组织分别在T1及T2加权像上如何显现的简要介绍。
Diffusion weighted imaging (DWI) 扩散成像
T-1 and T-2 weighted imaging(WI) were performed on both ax ialand sagital planes. MRI检查采用GE 0.;5T超导成像系统，行横断面和矢状面T1、T2加权成像。
The Studies were performed with SE T_1 weighted image(T_1WI) ahd RARE T_2 weighted image (T_2WI)sequence. SE序列为T_1加权成像(T_1wI); RARE序列为T2加权成像(T_2wI)。
The following is a general guide to how tissue appears on T1- or T2- weighted images. 以下是一个各种组织分别在T1及T2加权像上如何显现的简要介绍。
T 2-and proton density weighted images often showed high-signaling of pontine transversal fibers(19/28) and middle cerebellar peduncles (12/28). 在T2 和质子密度加权像上常可见桥横纤维 (19/ 2 8)和小脑中脚 (12 / 2 8)高信号。
The tumors are usually hypointensive of hypo-iso-intensive on T1 weighted images and are hyperin-tensive or hyper-iso-intensive on T2 weighted images. T_1加权图象肿瘤呈低信号或低等混合信号,T_2加权图象呈高信号或高等混合信号。
Transaxial T1,T2 weighted imaging and coronal T1 weighted imaging performed routinely on DISONICS 0.35 tesla superconducted imaging system. MRI成像采用DISONICS0.;35T超导成像系统，行横断面T1、T2加权及冠状面T1加权成像。
Keywords Thyroid neoplasms /Diag nosis;Mag netic resonance imag ing（MRI ）;Patholog y; 甲状腺肿瘤/诊断;磁共振成像;病理学;
The solid part of trigeminal neurinoma presented "peper salt" appearance in T2 weighted image and an obvious enhancement after enhanced scanning. 肿瘤实性部分在T2加权像呈“椒盐”样改变，增强扫描其实性部分明显强化。
Keywords Seizures;Magnetic resonance imag ing;Mesinal temporal sclerosis;Neuroimaging; 癫痫;磁共振检查;颞叶内侧硬化;
Oval and oval like low signals were showed in 3 and isosignals in 1 on T 1 weighted images of MRI and high signals with clear edge on T 2 weighted images. MRI显示圆形及类圆形T1WI像低信号 3例 ,等信号 1例 ; T2 WI像均为高信号 ,边缘清楚。