Liao Hongen, Matsui Kazuhiro, Dohi Takeyoshi
Graduate Sch. of Eng., Tokyo Univ.
Conf Proc IEEE Eng Med Biol Soc. 2005;2005:3169-72. doi: 10.1109/IEMBS.2005.1617148.
This paper describes a surgical navigation system for anterior cruciate ligament (ACL) reconstruction using an autostereoscopic image overlay technique. We superimpose a real three-dimensional (3-D) image onto the patient for image-guided therapy. The images are created by employing an animated visualization of integral videography (IV). IV records and reproduces 3-D images using a micro convex lens array and flat display; it can display geometrically accurate 3-D autostereoscopic images and reproduce motion parallax without the need for any special viewing or tracking devices. The use of semi-transparent display devices makes it appear that the 3-D image is inside the patient's body, which enables viewing the structure of ACL and detecting the position of femur, tibia and surgical tools. This is the first report of applying an autostereoscopic display with an image overlay system in ACL reconstruction surgery. Experiments demonstrated that the patient-image registration method and the fast IV rendering technique produce an average registration accuracy of 1.16 mm and frame rate of IV image display about 3 frames and 11 frames per second for organ and surgical tools respectively.
本文介绍了一种使用自动立体图像叠加技术的前交叉韧带（ACL）重建手术导航系统。我们将真实的三维（3-D）图像叠加到患者身上以进行图像引导治疗。这些图像是通过积分摄像（IV）的动画可视化创建的。IV使用微凸透镜阵列和平板显示器记录和再现3-D图像；它可以显示几何精确的3-D自动立体图像，并在无需任何特殊观看或跟踪设备的情况下再现运动视差。使用半透明显示设备使3-D图像看起来在患者体内，这有助于观察ACL的结构并检测股骨、胫骨和手术工具的位置。这是在ACL重建手术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，患者图像配准方法和快速IV渲染技术分别使器官和手术工具的平均配准精度达到1.16毫米，IV图像显示帧率分别约为每秒3帧和11帧。
