权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Virtual CT navigation image of the hepato-biliary system

肝胆系统虚拟CT导航图像

基本信息

批准号：
14570892
负责人：
UCHIDA Masafumi
金额：
$ 1.73万
依托单位：
KURUME UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14570892/
关键词：
CT Liver Biliary system Fusion Three-dimensional image Simulation Navigation fusion

项目摘要

Seventy-four consecutive patients were referred for the evaluation of hepatobiliary disease after discovery based on clinical symptoms and ultrasound. The CT scan started at the level of the diaphragm and covered the entire liver, common bile duct and pancreas. Using a power injector, contrast medium was injected through a 20-G high-pressure intravenous catheter at a rate of 4 mL/sec in an antecubital vein. The volume of contrast medium delivered was 2 mL per kilogram of body weight. Fourteen patients who underwent percutaneous transhepatic bileduct drainage (PTBD) to eliminate obstructive jaundice were injected by PTBD tube of contrast medium in addition to intravenous injection. The raw data was transferred automatically to a workstation in a 512 x 512 pixel format via Ethernet. The 3-or 4-phase source 2D CT images were reviewed and analyzed for 3D reconstruction and to obtain a fusion image. Virtual CT navigation image were obtained using virtual endoscopic technique on the workstation. These images were analyzed qualitatively based on visualization of the critical structures. While evaluating these frill scale-3D and virtual images obtained by our institute, these images were clearly depicted in most of cases. The depict of organs can be reconstructed while there were a significant difference of attenuation value between the organ and a region around structure, but the several cases were difficult to produce 3D image in small size and the equal attenuation value around the structure. We emphasize that our new technique may contribute to the laparoscopy during surgery as the aid of understanding of anatomical structures in these organs. Our images are extremely helpful to the surgeon in localizing lesions and minimizing operating time, the extent of surgical resection, and blood loss.

根据临床症状和超声发现后，连续74例患者被转诊进行肝胆疾病评价。CT扫描从横膈膜开始，覆盖了整个肝脏、胆总管和胰腺。使用动力注射器，通过20-G高压静脉导管以4 mL/sec的速率在肘前静脉中注射造影剂。造影剂的递送体积为每千克体重2 mL。对14例行经皮经肝胆管引流（PTBD）清除梗阻性黄疸的患者，除静脉注射造影剂外，还用PTBD管注入造影剂。原始数据通过以太网以512 x 512像素格式自动传输到工作站。对3期或4期源2D CT图像进行审查和分析，以进行3D重建并获得融合图像。在工作站上采用虚拟内窥镜技术获得虚拟CT导航图像。这些图像进行了定性分析的基础上可视化的关键结构。在评价我们所获得的这些三维和虚拟图像时，这些图像在大多数情况下都被清晰地描绘出来。当器官与周围结构的衰减值存在显著差异时，可以重建器官的轮廓，但在几种情况下，很难产生小尺寸和结构周围等衰减值的3D图像。我们强调，我们的新技术可能有助于腹腔镜手术中的解剖结构的理解，在这些器官的援助。我们的图像对外科医生定位病变和减少手术时间、手术切除范围和失血量非常有帮助。