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The methods of generating and displaying tomograms on the depth indicated by glances for the computer assisted surgery system.

用于计算机辅助手术系统的扫视指示深度生成和显示断层图像的方法。

基本信息

批准号：
08458292
负责人：
HAMA Hiromitsu
金额：
$ 4.74万
依托单位：
Osaka City University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
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

项目摘要

For the operation assistant system with overlapping tomograms on the body of a patient, the methods of generating tomograms fast on the indicated depth and calculating the depth from eyes'glances are developed.First, the fast and convenient method of generating tomograms is developed. The basic idea is that a mathematical relation exists between the depth of the generated image and the disparity of object images, that is, the objects at the same depth has the same disparity on the radiated images. This idea leads to the simple algorithm to shift an image to the position corresponding to the disparity at the indicated depth and add the shifted image to the standard image. This method generally runs on a such computer as the image processing unit.Second, the method is developed to select the image to be displayd on the Head Mounting Device according to the operato's eyes. The glance parameters are obtained from the device detecting the irises of the eyes and, then, the image depth indicated by the operator ca be calculated. On the calculation, the new method is applied to eliminating a slight movement of eyes that gives a bad influence to the accuracy of computation and the main movement of eyes can be obtained. The developed system is constructed from a few personal computers, that means, this system can be set even in a narrow room.

针对体层图像重叠的手术辅助系统，提出了在指示深度上快速生成断层图像和根据眼睛的扫视计算深度的方法，首先提出了一种快速方便的断层图像生成方法。其基本思想是生成图像的深度与目标图像的视差之间存在数学关系，即相同深度的目标在辐射图像上具有相同的视差。这种思想导致了简单的算法，即将图像移动到与指示深度处的视差相对应的位置，并将移动的图像添加到标准图像。该方法一般在图像处理单元等计算机上运行。其次，该方法是根据操作者的眼睛来选择要在头戴装置上显示的图像。从检测眼睛虹膜的装置获得扫视参数，然后，可以计算操作者指示的图像深度。在计算中，应用新的方法消除了影响计算精度的眼睛的轻微运动，可以得到眼睛的主要运动。所开发的系统是由几台个人计算机构成的，这意味着即使是在一个狭窄的房间里也可以设置该系统。