Method and apparatus for generating virtual internal fixture on basis of image reduction

Patent metadata

Field	Value
Publication number	US-12303206-B2
Application number	US-201917415526-A
Country	US
Kind code	B2
Filing date	Dec 23, 2019
Priority date	Jan 18, 2019
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

Provided are a method and an apparatus for generating a virtual internal fixture on the basis of image reduction, the method including: recognizing positions and shapes of multiple fracture fragments in a medical fracture image including a fracture site; determining conformity of the multiple fracture fragments by analyzing the shapes of the multiple fracture fragments; performing image reduction of the fracture site by moving the positions of the multiple fracture fragments on the basis of the conformity; and generating the virtual internal fixture for fixing the fracture site for which image reduction has been performed.

First claim

The invention claimed is:

1. A method of generating a virtual internal fixture on the basis of image reduction, the method comprising:
recognizing positions and shapes of multiple fracture fragments in a medical fracture image including a fracture site;
determining conformity of the multiple fracture fragments by analyzing the shapes of the multiple fracture fragments;
performing image reduction of the fracture site by moving the positions of the multiple fracture fragments on the basis of the conformity; and
generating the virtual internal fixture for fixing the fracture site for which image reduction has been performed.

2. The method of claim 1 , wherein the recognizing of the positions and the shapes of the multiple fracture fragments comprises:
selecting multiple regions of interest from the medical fracture image; and
extracting features of the multiple regions of interest.

3. The method of claim 2 , wherein at the recognizing of the positions and the shapes of the multiple fracture fragments, the shapes and the positions of the multiple fracture fragments are recognized by analyzing the features of the multiple regions of interest.

4. The method of claim 1 , wherein the determining of the conformity of the multiple fracture fragments comprises:
analyzing ridges and fracture lines of the multiple fracture fragments;
selecting a pair of conforming fracture fragments having the highest degree of conformity of the ridges and the fracture lines in the multiple fracture fragments; and
calculating matching vectors of vertexes corresponding to each other included in the respective fracture lines of the pair of the conforming fracture fragments.

5. The method of claim 4 , wherein at the performing of image reduction of the fracture site, image reduction of the fracture site is performed by moving at least one of the matching vectors of the vertexes corresponding to each other.

6. The method of claim 1 , wherein the generating of the virtual internal fixture comprises:
generating a plate body to be in contact with a surface of the fracture site for which image reduction has been performed; and
forming a fixing hole for inserting a fixing member into the fracture site and the plate body.

7. The method of claim 6 , wherein at the forming of the fixing hole, a position and a direction in which the fixing member is to be inserted are determined on the basis of the fracture site for which image reduction has been performed, and the fixing hole is formed.

8. The method of claim 6 , wherein at the forming of the fixing hole, the fixing hole is formed in a region other than a boundary between the multiple fracture fragments on the basis of the fracture site for which image reduction has been performed.

9. An apparatus for generating a virtual internal fixture on the basis of image reduction, the apparatus comprising:
a fracture fragment recognition unit recognizing positions and shapes of multiple fracture fragments in a medical fracture image including a fracture site;
a conformity determination unit determining conformity of the multiple fracture fragments by analyzing the shapes of the multiple fracture fragments;
an image reduction unit performing image reduction of the fracture site by moving the positions of the multiple fracture fragments on the basis of the conformity; and
a virtual internal fixture generation unit generating the virtual internal fixture for fixing the fracture site for which image reduction has been performed.

10. The apparatus of claim 9 , wherein the fracture fragment recognition unit comprises:
a region-of-interest selection unit selecting multiple regions of interest from the medical fracture image; and
a feature extraction unit extracting features of the multiple regions of interest.

11. The apparatus of claim 10 , wherein the fracture fragment recognition unit recognizes the shapes and the positions of the multiple fracture fragments by analyzing the features of the multiple regions of interest.

12. The apparatus of claim 9 , wherein the conformity determination unit comprises:
a shape analysis unit analyzing ridges and fracture lines of the multiple fracture fragments;
a conforming fracture fragment selection unit selecting a pair of conforming fracture fragments having the highest degree of conformity of the ridges and the fracture lines in the multiple fracture fragments; and
a matching vector calculation unit calculating matching vectors of vertexes corresponding to each other included in the respective fracture lines of the pair of the conforming fracture fragments.

13. The apparatus of claim 12 , wherein the image reduction unit performs image reduction of the fracture site by moving at least one of the matching vectors of the vertexes corresponding to each other.

14. The apparatus of claim 9 , wherein the virtual internal fixture generation unit comprises:
a plate body generation unit generating a plate body to be in contact with a surface of the fracture site for which image reduction has been performed; and
a fixing hole formation unit forming a fixing hole for inserting a fixing member into the fracture site and the plate body.

15. The apparatus of claim 14 , wherein the fixing hole formation unit determines, on the basis of the fracture site for which image reduction has been performed, a position and a direction in which the fixing member is to be inserted, and forms the fixing hole.

16. The apparatus of claim 14 , wherein the fixing hole formation unit forms the fixing hole in a region other than a boundary between the multiple fracture fragments on the basis of the fracture site for which image reduction has been performed.

Assignees

• Catholic Univ Korea Ind Academic Cooperation Foundation

Inventors

• Shin Seung Han
• Chung Yang Guk
• Yoon Do Kun
• Kim Moo Sub

Classifications

• A61B2017/568

  produced with shape and dimensions specific for an individual patient · CPC title

• A61B17/80 Primary

  Cortical plates {, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates} · CPC title

• A61B17/746

  the longitudinal elements coupled to a plate opposite the femoral head · CPC title

• A61B2034/105

  Modelling of the patient, e.g. for ligaments or bones · CPC title

• A61B2034/102

  Modelling of surgical devices, implants or prosthesis · CPC title