2) diffusion-weighted MR imaging
磁共振扩散加权成像
1.
Applications in evaluation of diffusion-weighted MR imaging in liver focal masses;
磁共振扩散加权成像在肝脏占位性病变中的应用
2.
Objective To evaluate the application of diffusion-weighted MR imaging(DWI) in hepatic masses.
目的 探讨磁共振扩散加权成像(DWI)在肝脏占位性病变中的诊断价值。
3) diffusion-weighted magnetic resonance imaging
扩散加权磁共振成像
1.
Magnetic resonance sialography(MRS) and diffusion-weighted magnetic resonance imaging(DW MRI) ,as two of the most important progresses in the latest MRI techniques,with the virtue of non-invasion and non-ionizing radiation,has been rapidly developed in salivary function assessment in recent years,and it has kept on improving technically.
磁共振涎管成像(magnetic resonance sialography,MRS)和扩散加权磁共振成像(diffusion-weighted magnetic resonance imaging,DW MRI)是近年新发展起来的涎腺功能评价方法,具有无创、无辐射的特点。
4) magnetic resonance diffusion weighted imaging
磁共振弥散加权成像
1.
A control study of magnetic resonance diffusion weighted imaging of patients with acute cerebral infarction and early(<48 hours) intervention with resuscitating and scalp acupuncture therapies(醒脑开窍针刺加头针法);
醒脑开窍针刺加头针早期介入治疗脑梗死的磁共振弥散加权成像对照研究
2.
Objectives To study the chronological and spatial rules of changes during focal cerebral ischemia and reperfusion in different brain regions with magnetic resonance diffusion weighted imaging (DWI) in a rat model of occlusion of middle cerebral artery(MCAO),and to explore the development of cytotoxic edema in acute phase.
目的 利用大鼠大脑中动脉阻塞 (MCAO)及再灌注模型 ,在磁共振弥散加权成像 (magneticresonancediffusion weightedimaging ,DWI)观察中 ,研究各脑区不同时相的缺血改变时空变化规律 ,探讨急性期细胞毒性水肿的演变。
5) Diffusion weighted imaging
磁共振弥散加权成像
1.
Diffusion weighted imaging is a unique and most ideal imaging method to observe water molecular diffusion in vivo tissue by using magnetic resonance imaging.
磁共振弥散加权成像(DWI)是利用MRI观察活体组织水分子弥散运动最理想且唯一的成像方法。
补充资料：13C 磁共振谱
13C（核自旋量子数I为1/2）在静磁场中能级分裂和从射频电磁波吸收能量由低能级跃迁至高能级而产生的磁共振谱,与质子磁共振谱相似，但有以下差别:①它在高能级的寿命较长，限制了使之进行跃迁的射频电磁波的功率；②磁共振的灵敏度与旋磁比γ 的三次方成正比，而，致使13C磁共振是1H磁共振的灵敏度的1/64；③13C的天然同位素丰度为1.1％,而1H则为99.8％，所以它的灵敏度又要比1H磁共振低两个数量级；④13C磁共振谱的分辨能力高,其化学位移范围为600微克（1H磁共振的仅为20微克），从而对分子量为300～500的有机化合物几乎可分辨每一个13C峰，这在1H磁共振中决不可能。从13C磁共振可以观测不与质子相连的基团，如C＝O、C呏N等基团。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条