低场强磁共振胆胰管成像(MRCP)的技术应用  

The Technological Application of Low Field MR Cholangiopancreatography

作　　者：杨素云[1] 陈瑞科 刘永强[1] 杨铎[1] 陈桂英[1] 

机构地区：[1]山东省单县中心医院CT/MR室,山东单县274300

出　　处：《实用放射学杂志》2001年第9期678-680,共3页Journal of Practical Radiology

摘　　要：目的　通过调节低场强 ( 0 .3T)MRFSE重T2 加权扫描参数 ,改进扫描角度 ,评估所获MRCP图像质量及对胆系梗阻疾病定性诊断的准确性。方法　 5 0例胆系梗阻患者分两种方法进行检查。全部病例先行常规MRI横轴位T1WI、T2 WI扫描 ;2 0例为FSET2 WI固定参数冠状位扫描 ;30例改变扫描角度 ,增强扫描层数 ,减少层间距 ,减少信号采集 (NSA)次数 ,缩短扫描时间 ,其成像效果两组进行比较。结果　经调节FSET2 WI扫描参数后所获MRCP图像清晰 ,胆胰管显示边缘清楚 ,胰管显示率由 2 0 %提高到 83.3% ;定性诊断由 88.9%提高到 93.3% ;梗阻定位诊断为 10 0 %。结论　低场强MRCP可通过调节扫描参数 ,提高图像质量和梗阻性黄疸定性诊断准确性 ,为临床治疗提供可靠依据。Objective To evaluate the images of MRCP acquired by adjusting 0.3 Tesla MR unit heavy T 2-weighted scanning parameters and altering scanning angle and diagnostic correctivity to biliary obstructive disease.Methods Routine MR T 1WI,T 2WI scanning were performed axial in 50 cases of patients with biliary obstruction.All of them were divided into two groups,20 cases of them were scanned coronal with FSE T 2-weighted fixed parameters,30 cases of them were scanned with altering scanning angle,increasing scanning slices,decreasing distance of two near slices,reducing signal collection times(NSA),shortening scanning time.Results The acquired images through adjusting FSE T 2-weighted scanning parameters were visualized clearly.The boundary of cholangiopancreatie ducts were showed clearly.The display rate of biliary and pancreatie ducts was elevaled from 20% to 83.3%.The accuracy of it for evaluating the causes of obstruction was increased from 88.9% to 93.3%.The accuracy of it in the detection of the location of bile duct obstruction was 100%.Conclusion Through adjusting scanning purameters low field MRCP is very helpful in improved images quality and reflecting veliable signs of biliary and pancreatie duct obstruction disease combined with MRI T 1-weighted T 2-weighted message.This method can increased the diagnostic accuracy of the causes of obseruction and supply the reliable ground for clinical treatment.

关 键 词：磁共振成像 胆系梗阻 胆胰管成像 MRCP 

分 类 号：R445.2[医药卫生—影像医学与核医学] R657.4[医药卫生—诊断学]