Computer aided design method for fracture reduction

A computer-aided and design method technology, applied in computer-aided planning/modeling, calculation, instruments, etc., can solve problems such as difficult surgical operations, radiation-exposed patients and doctors, and achieve fast solution speed and avoid universal locks Effect

Inactive Publication Date: 2018-01-09
BEIJING FRIENDSHIP HOSPITAL CAPITAL MEDICAL UNIV +1
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  • Application Information

AI Technical Summary

Problems solved by technology

During the operation, orthopedic surgeons rely on X-ray fluoroscopy to determine the position of the fracture end, the reduction situation, and the placement of internal fixation, etc., and the radiation exposure during the process poses potential risks to patients and physicians
At present, the commonly used intraoperative fluo...

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  • Computer aided design method for fracture reduction
  • Computer aided design method for fracture reduction

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Embodiment Construction

[0019] The present invention will be further elaborated below through specific embodiments in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, the computer-aided design method of the fracture reduction of the present embodiment comprises the following steps:

[0021] 1) Reconstruct the three-dimensional rigid body point system model of the two fracture ends through CT scan images, and determine the space rigid body point system of the inner wall of the medullary cavity and the outer wall of the bone of the two fracture ends;

[0022] 2) Using Principal Component Analysis (PCA) method to determine the long and short axes of the fracture sections of the two fracture ends respectively, and based on this, give the corresponding x in the three-dimensional Cartesian coordinate system 1 o 1 the y 1 plane and x 2 o 2 the y 2 plane; the intersection of the major axis and the minor axis is the center point of the broken section, and also the origin O...

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Abstract

The invention discloses a computer-aided design method for fracture reduction. The present invention determines the length and short principal axis of the broken section of the fracture, establishes a three-dimensional rectangular coordinate system, determines the quaternion representation of the vector on the central principal axis and its direction in the three-dimensional coordinate system, and selects the easy-to-operate fractured end as the distal end The fracture ends are rotated, rotated, and translated separately to obtain the coaxial optimal path point of the fracture ends, so as to realize the anastomosis of the fracture sections and complete the fracture reduction; the invention uses quaternion to represent the direction of the central axis of the two fracture ends. Vector, and then obtain the rotation axis and the rotation angle of each rotation, the quaternion is faster to solve when describing the rotation transformation, and can effectively avoid the occurrence of problems such as universal locks; the present invention rotates and spins the broken end of the fracture and translation operations to obtain the optimal coaxial trajectory point of the fracture end, which can provide effective information for doctors to diagnose and operate.

Description

technical field [0001] The invention relates to the field of computer surgical navigation, in particular to a computer-aided design method for fracture reduction. Background technique [0002] Fracture refers to a complete or partial break in the continuity of bone structure, and is a common trauma that is closely related to people's lives. The normal anatomical structure of patients with fractures is destroyed, affecting limb function, reducing the quality of life, and bringing burdens to society and families. With the continuous development of modern imaging technology, X-ray, computed tomography (CT), and magnetic resonance imaging can clearly diagnose most fractures, clearly display fracture types and displacement, and guide clinical treatment. The medical images obtained by CT scanning can clearly reflect the detailed information of complex intra-articular and spinal fractures, and the reconstructed three-dimensional images can more conveniently guide the surgical trea...

Claims

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Application Information

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IPC IPC(8): A61B34/10G06F17/50G06F19/00
Inventor 杨梅陈文韬汪帝王宝军张珏方竞
Owner BEIJING FRIENDSHIP HOSPITAL CAPITAL MEDICAL UNIV
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