磁共振弥散加权成像技术在脑梗死诊断中的应用

磁共振检查已从过去单一的观测生理、病理条件下的生物体解剖结构以及形态学上的变化,发展到研究生物体功能与活动机制,并进入到分子影像与功能性磁共振成像（fMRI）,而弥散加权磁共振成像技术（DWI）就是这其中之一,主要用于脑梗死的早期诊断。通过对磁共振弥散加权成像技术、DWI鉴别急性和非急性脑梗死的病理生理基础、DWI检查的时间价值的阐述,认为应用DWI区分急性和非急性脑梗死对临床治疗该疾病有着积极的意义,临床医师可以根据脑梗死的不同时期采取有针对性的治疗方案,回避不安全的治疗,避免不必要的具有风险性的治疗方法。

Magnetic resonance diffusion weighted imaging in the diagnosis of cerebral infarction

Magnetic resonance imaging has developed from a single observation of organisms＇ anatomy and the change of morphology under the physiological and pathological conditions to the study of biology function and activity mechanism. Furthermore, it has entered into the molecular imaging and functional magnetic resonance imaging （fMRI）, and diffusion-weighed imaging （DWI） is one of them, which is mainly used in the early diagnosis of cerebral infraction. This article elaborates diffusion-weighed imaging,the identification of acute and non-acute cerebral infarction by DWI in physiological basis of pathogenesis and the time vale of DWl examination. The author holds the opinion that it is of great significance to distinguish between acute and non-acute cerebral infarction by usinl~ DWI and that clinicians may adopt targetedtherapies according to the different periods of cerebral infarction in order to avoid unsate and unnecessarily risky treatments.