肝脏管道系统灌注后薄层CT扫描和三维重建的研究

目的,建立肝脏管道系统灌注和铸型的模型,研究肝脏管道系统灌注后CT薄层扫描图像三维重建成像方法。方法 肝门部保留完好的完整肝脏,经预处理后,分别以不同配方的灌注材料和显影物质对管道灌注、固定和铸型。肝脏标本置于模拟腹腔模具内行CT薄层扫描,以最大密度投影法(MIP)、表面覆盖显示法(SSD)和电脑处理法进行肝脏管道结构的三维重建。结果 14个肝脏标本的管道系统灌注和铸型,所有管道显示良好。9个肝脏标本薄层CT扫描层厚1．0mm,共计2514张,平均279张。5个肝脏标本薄层CT扫描层厚3．0mm,共计512张,平均102张。MIP三维重建图像肝内肝静脉系统和门静脉系统清晰。SSD三维重建图像显示很强的立体感。电脑处理法建立肝实质和肝静脉系统三维图像。通过不同层面的旋转,可获得肝实质和肝静脉系统各种形态的立体图像。结论 肝脏管道系统灌注和铸型标是实用的,MIP、SSD和电脑处理法的三维重建图像清晰,是研究肝脏管道结构较理想的方法。

Study of three-dimensional computerized reconstruction and CT scanning with thin slice after filling hepatic duct system

ObjectiveTo establish the modal of perfusing and casting in hepatic duct system and explor the methods of three dimensional reconstruction with CT scanning image after filling hepatic duct. MethodsAll canal of livers with integra porta hepatic were perfused with various filling material after pretreatment,then fixed and casted. Hepatic preparations that had been perfused were put into the model of modelling abdominal cavity and scanned with thin slice.The three dimensional duct structures of hepatic with three methods of MIP ,SSD and comperized treatment. ResultsFourteen hepatic samples were filled and casted. Nine hepatic samples were scanned with slice hight 1.0 mm,all 2514 slice images and average 279 images. Five hepatic samples were scanned with slice hight 3.0 mm,all 512 slice images and average 102 images.Intrahepatic vein and portal vein system of three dimensional recostruction were seen clearly with MIP method. The three dimensional established three dimensional images with SSD method was shown much stronger than that of MIP method. The three dimensional images of hepatic solid and hepatic vein system were established with method of comperized treatment. Vary three dimensional shape of hepatic solid and hepatic vein was obtained through different direction rotational. ConclusionsThe modal filled and casted hepatic duct system were practise.The images established three dimensional with methods of MIP,SSD and comperized treatment were seen clearly. The modal and images of thin slice CT scanning are a better method for researching hepatic duct system.