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磁共振弥散加权成像 (DWI)依靠不同组织间水分子弥散的差异性 ,提供一种与以往T1加权像、T2 加权像不同的、新的成像对比。其在超早期脑缺血定性、定位诊断中的作用已被肯定 ,并已逐渐应用于其他系统疾病的诊断和鉴别诊断 ,其作用已引起人们广泛关注。现综述该技术的基本原理及在肿瘤鉴别诊断中的应用价值。
Magnetic resonance diffusion-weighted imaging (DWI) relies on differences in the diffusion of water molecules between different tissues to provide a new imaging contrast to previous T1-weighted and T2-weighted images. Its role in the diagnosis and localization of ultra-early cerebral ischemia has been affirmed and has been gradually applied to the diagnosis and differential diagnosis of other systemic diseases, and its role has drawn wide attention. Now summarize the basic principles of the technology and its value in the differential diagnosis of tumors.