FLAIR在腹部疾病的应用

目的 探讨液体衰减反转恢复序列（fluid attenuated inversion recovery,FLAIR)与其他序列搭配在腹部疾病应用的临床价值，并初步评价其适用范围。材料与方法 对36例腹部疾病患者共126个病灶进行定性，按常规扫描方法加上FLAIR序列进行检查，之后根据需要按照下列步骤进行扫描：（1）行质子像（PDW）；（2）多回波成像；（3）仅10例患者行静脉注射Gd-DTPA扫描。结果 经FLAIR后病灶依信号强度分为3种；（1）高信号（病灶信号无改变）；（2）等信号；（3）低信号，分别为28个（22．22％）、27个（21．43％）71个（56．35％）病灶。有102个病灶FLAIR明确诊断，占80．95％。24个行质子像、多回波成像定性。其中10例经增强扫描确定性质。低信号病灶均为囊性病变或液体，等信号病灶均为良性病变。结论 FLAIR是90年代开发的MR成像新技术。腹部应用尚未见报道。在结果判定上以低信号组病例最具有诊断意义，等信号组均为良性病变，高信号组解释较为复杂。其优点有：（1）检查时间缩短；（2）能提高病灶的检出率；（3）病灶结构，性质易于判定；（4）减轻了患者的经济负担。

The Applications of FLAIR in the Abdominal Diseases

Objective To evaluate FLAIR, combined with other sequences, in the diagnosis of abdominal diseases and its clinical applicable scope.Materials and Methods FLAIR and, if necessary, PDW, multi echo sequence and/or Ga DTPA enhanced scanning were performed in 36 patients with 126 abdominal localized lesions. MRI findings were analyzed and qualitative diagnosis was made.Results On FLAIR scans, the lesions displayed hig intensity signal (n=28, 22.22%), or iso intensity signal (n=27, 21.43%), or low intensity signal (n=71, 56.35%). All the lesions showing iso intensity signal were benign, while all the lesions showing low intensity signal were cyst or fluid collection.Conclusion The authors consider that FLAIR has three advantages: (1) the whole procedure takes a very short time; (2) the detecting rate of the lesion is higher; and (3) the cost is low.