Liao Hongen, Hata Nobuhiko, Nakajima Susumu, Iwahara Makoto, Sakuma Ichiro, Dohi Takeyoshi
Graduate School of Information Technology Science, The University of Tokyo, Tokyo 113-8656, Japan.
IEEE Trans Inf Technol Biomed. 2004 Jun;8(2):114-21. doi: 10.1109/titb.2004.826734.
This paper describes an autostereoscopic image overlay technique that is integrated into a surgical navigation system to superimpose a real three-dimensional (3-D) image onto the patient via a half-silvered mirror. The images are created by employing a modified version of integral videography (IV), which is an animated extension of integral photography. IV records and reproduces 3-D images using a microconvex lens array and flat display; it can display geometrically accurate 3-D autostereoscopic images and reproduce motion parallax without the need for special devices. The use of semitransparent display devices makes it appear that the 3-D image is inside the patient's body. This is the first report of applying an autostereoscopic display with an image overlay system in surgical navigation. Experiments demonstrated that the fast IV rendering technique and patient-image registration method produce an average registration accuracy of 1.13 mm. Experiments using a target in phantom agar showed that the system can guide a needle toward a target with an average error of 2.6 mm. Improvement in the quality of the IV display will make this system practical and its use will increase surgical accuracy and reduce invasiveness.
本文描述了一种自动立体图像叠加技术，该技术集成到手术导航系统中，通过半镀银镜将真实的三维（3D）图像叠加到患者身上。这些图像是通过采用积分摄像（IV）的改进版本创建的，积分摄像是积分摄影的动态扩展。IV使用微凸透镜阵列和平板显示器记录和再现3D图像；它可以显示几何精确的3D自动立体图像，并再现运动视差，而无需特殊设备。使用半透明显示设备使得3D图像看起来在患者体内。这是在手术导航中应用自动立体显示与图像叠加系统的首次报告。实验表明，快速IV渲染技术和患者图像配准方法产生的平均配准精度为1.13毫米。使用幻影琼脂中的目标进行的实验表明，该系统可以将针引导向目标，平均误差为2.6毫米。IV显示器质量的提高将使该系统实用化，其使用将提高手术准确性并减少侵入性。
