Method and navigation system for registering a two-dimensional image dataset and a three-dimensional image dataset of a region of interest - Patents.com

The method and navigation system enhance the alignment of two-dimensional and three-dimensional images in spinal surgery by generating reconstructed images and using virtual cameras with spatial parameters, addressing inefficiencies and inaccuracies in conventional methods while reducing radiation exposure.

JP2024541438A5Active Publication Date: 2025-07-10REMEX MEDICAL CORP
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Patent Information

Application Number
JP2024529814
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-07-01
Filing Date
2022-11-18
Publication Date
2025-07-10
Estimated Expiration
2042-11-18

AI Technical Summary

Technical Problem

Conventional spinal navigation systems require X-ray detection, exposing patients to radiation, and existing methods for aligning two-dimensional and three-dimensional images in spinal surgery are inefficient, time-consuming, and prone to inaccuracies due to interference from anatomical structures like pedicle screws, cages, ribs, and femurs.

Method used

A method and navigation system that includes generating reconstructed images from three-dimensional data sets, calculating similarity degree values, and aligning two-dimensional and three-dimensional images using virtual cameras with spatial parameters to improve alignment efficiency and accuracy, allowing for re-alignment when initial procedures fail.

Benefits of technology

The method and system enable faster and more accurate alignment of two-dimensional and three-dimensional images, reducing radiation exposure by completing the alignment process more quickly and effectively, even when initial procedures fail.

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Abstract

A method for registering a two-dimensional image dataset and a three-dimensional image dataset of a region of interest is provided. [Solution] The method includes a step of defining a first vector of a registered virtual camera in the coordinate system of a three-dimensional image dataset; a step of transforming the first vector of the registered virtual camera by at least one transformation matrix to obtain a first transformation vector of an unregistered virtual camera in the coordinate system of the three-dimensional image dataset; a step of defining a focal point of the unregistered virtual camera in the coordinate system of the three-dimensional image dataset to be located at a reference point of the two-dimensional image dataset; and a step of generating an updated reconstructed image after repositioning the unregistered virtual camera by repositioning the unregistered virtual camera based on the first transformation vector and the focal point of the unregistered virtual camera.
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