CAJ | 학술논문

目的：评价低场磁共振的扩散加权成像（DWI）在超急性期脑梗死诊断上的应用价值。方法：用低场磁共振扩散加权成像诊断超急性期脑梗死36例，分析不同时间的影像学特点，并与常规 MRI 平扫进行比较。结果：低场磁共振DWI 能显示所有患者超急性脑梗死病灶，而有11例患者在常规 MRI 平扫上未发现异常，其中7例为发病2 h 内，4例为2～4 h。此外，DWI 还可发现发病1 h 内的脑梗死高信号灶，而且 DWI 显示的病灶范围较常规 T2 WI 显示的范围更大、信号更高。结论：颅脑低场强磁共振扩散成像可以诊断超急性期脑梗死，比 T2 WI、T2 FLAIR 平扫能更早显示病变，在发现病变、确定病变部位、病变范围具有较高的价值，可为临床早期治疗提供可靠的诊断依据。
목적：평개저장자공진적확산가권성상（DWI）재초급성기뇌경사진단상적응용개치。방법：용저장자공진확산가권성상진단초급성기뇌경사36례，분석불동시간적영상학특점，병여상규 MRI 평소진행비교。결과：저장자공진DWI 능현시소유환자초급성뇌경사병조，이유11례환자재상규 MRI 평소상미발현이상，기중7례위발병2 h 내，4례위2～4 h。차외，DWI 환가발현발병1 h 내적뇌경사고신호조，이차 DWI 현시적병조범위교상규 T2 WI 현시적범위경대、신호경고。결론：로뇌저장강자공진확산성상가이진단초급성기뇌경사，비 T2 WI、T2 FLAIR 평소능경조현시병변，재발현병변、학정병변부위、병변범위구유교고적개치，가위림상조기치료제공가고적진단의거。
Objective:To evaluate the value of low field magnetic resonance diffusion weighted imaging (MR DWI)in the diagnosis of superacute cerebral infarction.Methods:Low field MR DWI was performed in 36 patients with superacute cerebral infarction,the imaging manifestations of various stages were analyzed and compared with that of conventional plain MRI.Results:All of the lesions in super acute cerebral infarction could be revealed on low field MR DWI.However,lesions could not be displayed on conventional plain MRI in 11 patients.Of which,7 cases were within 2h and 4 patients within 2h to 4h after onset.Whereas,low field DWI had the ability to display lesions within 1h after onset,which demonstrated as high signal intensity,and the lesions showed on DWI were larger and with higher signal intensity compared with that on conven-tional T2 WI.Conclusion:Superacute cerebral infarction could be diagnosed with low field MR DWI,which had the ability to show lesions earlier than T2 WI and T2 FLAIR,and was superior in displaying and localizing cerebral lesions as well as their extent,provides reliable basis for early clinical treatment.