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Evaluation on Spatial extension and lymph node metastasis of Biliary tract tumors with Three-dimentional ultrasound image

三维超声图像评价胆道肿瘤的空间扩展及淋巴结转移

基本信息

批准号：
08407025
负责人：
NAKAMURA Hironobu
金额：
$ 10.43万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08407025/
关键词：
Ultrasound Three dimensional Biliary tract tumor 体腔内超音波三次元画像胆道系腫瘍

项目摘要

The result of this research consists of three parts. 1) 3D localizer for ultrasound endoscope by outside-body markers. 2) Reconstruction of 3D ultrasound images using intraluminal ultrasound : phantom study. 3) Reconstruction of 3D ultrasound images using intraluminal ultrasound : clinical study and comparison with other imaging modalities.1) We proposed a method with which we can identify 3D position and direction of ultrasound scanning probe inserted into inside of the body, which gives endocopic image. We use marker transducers placed on surface of the body, which tansit pulses synchronized to ultrasound scanner, The method of measuring position(direction and distance between scanning probe inside of the body and transducer outside of the body) of marker on the scanned image obtained with ultrasound endoscope by using adaptive threshold and robust algorithm is described.2) We adapted a mass of ham surfaced with gulf as a bile duct phantom. We obtained continuous short-axis ultrasoun … More d image by placing the intraluminal ulrasound probe near the gulf of the hum drawing 0.1mm per image in the long-axis direction using pull-back device. We obtained long-axis reconstructed images and 3D images with surface rendering method based on the short-axis ultrasound image. We could obtain the ultrasound images of the phantom in any direction and 3D images od the surface of the phantom.3) We obtained the reconstruction images and 3D images obtained with surface rendering method with the same method we obtained the phantom images in two clinical cases. Comparison was made between the reconstruction and 3D images, and CT and MRI, In both cases, the reconstruction and 3D images were inferior to CT and MRI in the demonstration of bile duct tumor and its lymph node metastasis. The problems considered were inherit lowcontrast resolution of ultrsound images, twisting of the intraluminal ultrasound probe in the common bile duct, and short penetration distance of the intraluminal ultrasound probe. Less

本研究的结果主要包括三个部分。1)体外标记超声内窥镜三维定位器。2)利用腔内超声重建三维超声图像：体模研究。3)利用腔内超声重建三维超声图像：临床研究及与其他成像模式的比较1）提出了一种方法，利用该方法可以识别插入体内的超声扫描探头的三维位置和方向，从而得到内窥镜图像。我们采用标记物传感器放置在人体表面，其发射的脉冲与超声扫描仪同步，描述了利用自适应阈值和鲁棒算法在超声内窥镜扫描图像上测量标记物位置（体内扫描探头与体外传感器之间的方向和距离）的方法。2）我们采用带有海湾的火腿块作为胆管体模。我们获得了连续短轴超声 ...更多信息通过将腔内超声探头放置在Hum的海湾附近，使用拉回装置在长轴方向上绘制0.1mm的每个图像来进行D成像。在短轴超声图像的基础上，利用表面绘制方法获得了长轴重建图像和三维图像。3）用面绘制法（Surface Rendering Method）获得了体模的三维重建图像和三维图像。用同样的方法获得了两个临床病例的体模图像。结果显示，在显示胆管肿瘤及其淋巴结转移方面，重建及三维图像均不如CT及MRI。考虑的问题是超声图像的对比度分辨率低，管腔内超声探头在胆总管内的扭曲，管腔内超声探头的穿透距离短。少