Space Registration Accuracy Verification: A Case Study on Spine Surgery Navigation System

2.5.2 Space Registration Accuracy Verification

A surface registration experiment was designed to verify the accuracy and practicality of the system. The experimental steps are as follows:

Step 1: The patient's CT medical sequence images were reconstructed in 3D using the cube movement algorithm, and a 3D virtual model of the spine was obtained.

Step 2: The personalized marker image was captured by the camera in real-time using the Aruco marker-based matching algorithm, completing the spatial registration of the patient to the world coordinate system.

Step 3: The transformation matrix of the marker coordinate system to the X-ray image coordinate system and the transformation matrix of the intraoperative X-ray image coordinate system to the CT image coordinate system were solved to complete the spatial registration of the medical image coordinate to the world coordinate system.

Step 4: Finally, the spine surgery navigation system based on augmented reality was used to overlay and fuse the virtual spine model and patient image, achieving external visualization of the spine image.