Pediculus arcus vertebrae internal fixation operation navigation system based on structured light scanning

Abstract

The invention provides a pediculus arcus vertebrae internal fixation operation navigation system based on structured light scanning. The system comprises a structured light scanner, a dynamic base, operation instruments and a computer provided with an operation navigation software and a sick bone CT (Computed Tomography) three-dimensional model, wherein during the operation, the dynamic base is fixedly arranged at a sick bone; the structured light scanner is utilized to scan the sick bone so as to obtain a structured light three-dimensional image and is subjected to surface rectification together with the sick bone CT three-dimensional model; a camera on the structured light scanner is utilized to track the operation instrument, so as to obtain the position relations of the operation instruments relative to the dynamic base and the sick bone three-dimensional model; and the position relations are displayed on the computer provided with the operation navigation software in real time, so as to realize operation navigation. Compared with similar systems, the operation navigation system provided by the invention does not require an infrared navigation position finder to participate in tracking during the operation, can be used for improving the navigational fixing precision, simplifying the operation navigation process, lowering the complexity and cost of the whole system and occupying less space of an operation room, and can be conveniently used by doctors.

Description

technical field [0001] The invention relates to a computer-aided navigation system for pedicle internal fixation surgery, in particular to a navigation system for pedicle internal fixation surgery based on structured light scanning. Background technique [0002] Pedicle fixation surgery is a standardized routine surgery for thoracolumbar spinal fractures. This surgery stabilizes the spine by implanting pedicle screws. It can be used to treat spondylolisthesis, thoracolumbar fractures and other diseases. Since the spinal cord and nervous system adjacent to the pedicle are often not visible during surgery, this type of surgery is dangerous and difficult. Clinical studies have shown that the screw deviation rate of traditional pedicle internal fixation surgery is 28-40%, which is the main cause of surgical failure and postoperative complications. [0003] Computer Aided Orthopedic Surgery (CAOS) is guided by medical images (such as CT, MRI, X-ray or three-dimensional ultrasoun...

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Problems solved by technology

[0007] However, the above-mentioned surgical navigation system still has disadvantages: after the registration is completed, in order to track the position of the dynamic reference and surgical instruments, the infrared navigation locator is still required to participate, and the obtained position information exists in the position information exchange and communication with the structured light scanner. Calibration problems increase the complexity of the entire system, increase costs, and reduce the probability of stable system operation

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