# US 10,869,725 B2 · Simulated method and system for navigating surgical instrument based on tomography

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- Number: US 10,869,725 B2
- Document ID: US10869725B2
- Status: Granted
- Kind: B2
- Application number: 15/701,510
- Filed: 2017-09-12
- Published: 2018-07-19
- Granted: 2020-12-22
- Earliest claimed: 2017-01-13
- Assignees: China Medical University; China Medical University Hospital
- Applicants: China Medical University; China Medical University Hospital
- Inventors: Yi-Wen Chen; Cheng-Ting Shih; Wei-Chuan Chen
- Web page: https://patentgrep.com/patent/US10869725B2

## CPC

- A61B 34/20: Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
- A61B 5/0536: Impedance imaging, e.g. by tomography
- A61B 6/022: {Stereoscopic imaging}
- A61B 6/12: Arrangements for detecting or locating foreign bodies
- A61B 34/10: Computer-aided planning, simulation or modelling of surgical operations
- G06F 3/04815: Interaction with a metaphor-based environment or interaction object displayed as three-dimensional [3D], e.g. changing the user viewpoint with respect to the environment or object
- G06F 3/04847: Interaction techniques to control parameter settings, e.g. interaction with sliders or dials
- G06T 19/003: {Navigation within 3D models or images}
- H04N 13/204: using stereoscopic image cameras (stereoscopic photography G03B35/00)
- A61B 6/032: {Transmission computed tomography [CT]}
- A61B 8/085: {for locating body or organic structures, e.g. tumours, calculi, blood vessels, nodules}
- A61B 2034/2051: {Electromagnetic tracking systems}
- A61B 2034/2055: {Optical tracking systems}
- A61B 2034/2065: {Tracking using image or pattern recognition}
- A61B 2090/3762: {using computed tomography systems [CT]}
- H04N 2013/0074: {Stereoscopic image analysis}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A simulated method and system for surgical instrument based on tomography are provided. The method includes obtaining a biological stereoscopic image and inputting a parameter set of an implant to be implanted, denoting a target position and an initial position in the biological stereoscopic image, estimating a dimensional coordinate of a contact area of the implant and a living organism when the implant has been implanted into the living organism based on the parameter set, the target position and the initial position in the biological stereoscopic image, and obtaining a physiological data set by re-sampling corresponding to the dimensional coordinate of the implant in the living organism for evaluating the effect after the implant has been implanted into the living organism. Surgeons may evaluate the effect after implantation of implant into the living organism by using the simulated method, enhancing the overall quality and result of the surgery.

## Claims

### Claim 1

A simulated method for navigating surgical instrument based on tomography, comprising:
obtaining a biological stereoscopic image and inputting a parameter set of an implant to be implanted;
denoting a target position and an initial position in the biological stereoscopic image;
estimating a dimensional coordinate of a contact area of the implant and a living organism when the implant has been implanted into the living organism based on the parameter set, the target position and the initial position in the biological stereoscopic image;
obtaining a physiological data set by re-sampling corresponding to the dimensional coordinate of the implant in the living organism; wherein a tomographical physiological data is obtained according to the dimensional coordinate in the living organism, and a bone volume fraction physiological data, a volumetric bone mineral density physiological data or a blood vessel path physiological data is obtained according to the tomographical physiological data;
obtaining the dimensional coordinate of the implant and the dimensional coordinate of a contact area as a CT image for evaluating the effect after the implant has been implanted into the living organism;
setting a rigid destructive mode and a soft destructive mode in the parameter set;
when the rigid destructive mode has been set, sampling after the corresponding space in the living organism has been replaced by the implant in order to obtain the dimensional coordinate and the physiological data; and
when the soft destructive mode has been set, sampling the corresponding space in the living organism in order to obtain the dimensional coordinate and the physiological data after evaluating a deformation of the biological stereoscopic image according to the parameter set.

### Claim 2 (depends on 1)

The simulated method as claimed in claim 1, wherein a computed tomographical physiological data is obtained according to the dimensional coordinate in the living organism, and a bone volume fraction physiological data and a volumetric bone mineral density physiological data is obtained according to the computed tomographical physiological data.