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Fixing and navigating surgery system in vertebral pedicle based on structure light image and method thereof

A surgical system and structured light technology, applied in surgical navigation systems, internal fixators, surgery, etc., can solve the problems of collision between surgical instruments and dynamic benchmarks, prolonged operation time, unsatisfactory registration accuracy, etc., and reduce manual point picking. Error, reduce X-ray radiation, improve the effect of surgical safety

Inactive Publication Date: 2010-10-20
PEKING UNION MEDICAL COLLEGE HOSPITAL CHINESE ACAD OF MEDICAL SCI
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Problems solved by technology

For example, using the infrared active induction surgical navigation system of Stryker Company for clinical surgery, the doctor reported that when the system is used for point registration, the registration accuracy is not ideal due to the influence of operational errors and point registration methods; The collision of the dynamic benchmarks changes the registration relationship and requires re-registration, which prolongs the operation time

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  • Fixing and navigating surgery system in vertebral pedicle based on structure light image and method thereof
  • Fixing and navigating surgery system in vertebral pedicle based on structure light image and method thereof
  • Fixing and navigating surgery system in vertebral pedicle based on structure light image and method thereof

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Embodiment Construction

[0033] Such as figure 1As shown, first, the patient is scanned before operation to obtain the CT data 1 of the spine. CT is to transmit X-ray beams from multiple directions along a selected fault layer of the human body, measure the amount of X-rays transmitted, and calculate the absorption coefficient of each unit volume of tissue at this layer after digitization, and then reconstruct it into an image. An imaging technique. CT images are represented by different gray values, reflecting the differences in the absorption and transmittance of X-rays by various organs and tissues. Among them, the black shadow indicates the low absorption area, that is, the low density area, such as soft tissue; the white shadow indicates the high absorption area, that is, the high density area, such as bone. The decomposition threshold is set according to the gray level step between different tissues, and then the boundary of each organ in the CT image is extracted by using the threshold, which...

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Abstract

The invention provides a fixing and navigating surgery system in a vertebral pedicle based on a structure light image. The system comprises a structure light scanner, an infrared navigating and positioning apparatus, a dynamic standard, a surgery apparatus with a plurality of infrared luminous diodes and a computer, wherein the structure light scanner and the infrared navigating and positioning apparatus are arranged in a positioning way; the surgery apparatus is provided with the plurality of infrared luminous diodes, and the infrared light transmitted from the diodes are captured by the infrared navigating and positioning apparatus to define the relationship between the navigation coordinate system of the infrared navigating and positioning apparatus and the surgery apparatus coordinate system of the surgery apparatus; and the dynamic standard which is clamped on the patient vertebra is also provided with a plurality of infrared luminous diodes for instantly tracking the change of a patient coordinate system to the navigation coordinate system. The invention replaces doctor manual pointing with the structure light image scanning, reduces the manual operation error, and reduces the injure of the X ray to the doctor and the patient; and the dynamic standard also has the characteristics of small volume and good function, can improve the reliability of the surgery and the precision of the nail implantation, and reduces surgical wounds.

Description

technical field [0001] The present invention relates to a computer-aided surgery system and method used in spinal surgery, and in particular, to a registration system and method for pre-operative CT scanning and intra-operative structured light images. Background technique [0002] Pedicle fixation is a standardized routine operation for the treatment of thoracolumbar spinal fractures. This method stabilizes the spine by implanting pedicle screws. It can be used to treat spondylolisthesis, thoracolumbar fractures and other diseases. Because the pedicle is close to the spinal cord and nervous system, the pedicle is often invisible during the operation, so the operation is very difficult. Clinical studies have shown that the screw deviation rate of traditional pedicle fixation is 28-40%. [0003] Under the guidance of medical images, such as CT, MRI, X-ray or three-dimensional ultrasound, computer-aided orthopedic surgery (Computer Aided Orthopedic Surgery, also known as CAOS)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B19/00A61B6/03A61B17/70G01B11/24G01S5/16A61B34/20
Inventor 李书纲郑浩峻
Owner PEKING UNION MEDICAL COLLEGE HOSPITAL CHINESE ACAD OF MEDICAL SCI
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