磁共振弥散加权成像技术在脑梗塞早期诊断及腔隙性脑梗塞(急性期

磁共振弥散加权成像技术在脑梗塞早期诊断及腔隙性脑梗塞(急性期、亚急性期、慢性期)诊断中的应用价值分析

宗桂华

【期刊名称】《中国继续医学教育》 【年(卷),期】2015(000)003

【摘要】The conventional MRI imaging technology has its shortcomings in the early diagnosis of cerebral infarction, new technology diffusion weighted magnetic resonance imaging (DWI) application, make up a deifciency. It uses the diffusion motion characteristics of water molecules, micro motion of water molecules, to study the disease and its development from the cell and molecular level. Imaging principle is to use the conventional SE sequences, 180 degrees in the focusing radiofrequency pulse before and after each plus a symmetrical position the last polar opposite gradient ifeld. Through some cases, through statistical analysis of the image by using MRI and DWI contrast scan, clinical practice for the diagnosis of the lesion conifrmed acute cerebral infarction, DWI has good sensitivity and speciifcity. At the same time, the range of rADC value of its corresponding cerebral infarcts in the pathogenesis of different period, we can more objectively relfect the lesion duration and time of onset..%常规MRI成像技术在脑梗塞早期诊断中有其不足之处，新技术磁共振弥散加权成像（DWI）的应用，弥补了不足。它利用水分子的弥散运动特性，反应水分子的微观运动状况，从细胞及分子水