胆囊及胆总管结石MRC:3D原始图与MIP图对比研究

目的 :评价磁共振胆管成像 (MRC)三维原始图 (简称为原始图 )与 3D最大强度投影 (MIP)重建图像 (简称为MIP图 )在胆囊结石及胆总管结石中的应用价值。方法 :对 42例明确诊断为胆囊或胆总管结石的患者行 3DFSE扫描 ,获得原始图后 ,经工作站行靶最大强度投影 (MIP)重建得到三维立体图。两位有经验的放射学医师对图像进行分析 ,在病变的显示与否上取得一致。然后 ,对原始图及MIP图对结石的显示率进行统计学处理。结果 :在胆总管结石的显示上 ,原始图及MIP的显示率分别为 93 .3 3 %和 86.67% ,两者差异无显著性意义 (P >0 .0 5 ) ;而对于胆囊结石 ,显示率分别为97.0 6%和 2 3 .5 3 % ,两者间差异存在显著性意义 (P <0 .0 5 )。结论 :原始图及MIP图在显示胆总管结石上 ,两者具有同样较高的临床价值 ,而在显示胆囊结石上 ,原始图的临床应用价值要明显高于MIP图

Clolecysto- and choledocholithiasis:a comparitive srudy of three-dimensional(3D) FSE source image and MIP reconstructed image

Object:To evaluate the application of 3D FSE source image and maxium intensity projection (MIP) image in demonstration of cholecystolithiasis and choledocholithiasis.Mehtods:Forty two patients with choledocholithiasis and cholecystolithiasis or both were studied with 3D FSE sequence,then 3D source images were processed to MIP using a targeted MIP algorithm at workstation.The studies were randomized for interpretation by two experienced radiologists.The sensitivity of source image and MIP image was calculated and compared.Results:Common ductal stones were revealed with source images and MIP images in 14 (93.33%) and 13 patients(86.67%)( P >0.5),respectively.The difference of sensitivities between the two methods was not significant.In cholecystolithiasis,the sensitivity was 97.06% and 23.53%( P <0.05) for source and MIP images,respectively.The sensitivity of source images was significantly higher than that of MIP images.Conclusion:Our results indicate that source images and MIP images have similar value in detecting choledocholithiasis.But for the detection of cholecystolithiasis,source images are significantly more sensitive than MIP images.