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Lumbar vertebra three-dimensional measurement method

A three-dimensional measurement, lumbar spine technology, applied in image data processing, 3D modeling, instruments, etc., can solve the problem of three-dimensional reconstruction model formulating measurement specifications and other issues

Active Publication Date: 2013-06-19
PEKING UNION MEDICAL COLLEGE HOSPITAL CHINESE ACAD OF MEDICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the human spine is a complex and changeable special structure, it is also difficult for the 3D reconstruction model to quantify and formulate measurement specifications based on certain anatomical feature points. Therefore, for complex human bones that cannot be measured by mathematical functions at present, The measurement of 3D images is still a hot spot and difficult point in 3D measurement

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  • Lumbar vertebra three-dimensional measurement method
  • Lumbar vertebra three-dimensional measurement method
  • Lumbar vertebra three-dimensional measurement method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 Three-dimensional digital measurement method and example of lumbar vertebra

[0032] 1. Materials and methods:

[0033] 1. Materials

[0034] 1.1) Specimen selection

[0035] A normal adult isolated lumbar vertebral dry bone specimen treated with 10% formalin was taken, and its attached soft tissue structures were dissected and removed. All specimens were provided by the Department of Anatomy, Peking Union Medical College.

[0036] 1.2) Instruments and equipment

[0037] SIEMENS / Sensation 64-slice CT machine.

[0038] 2. Method

[0039] 2.1 Measurement parameter indicators

[0040] Spinal canal sagittal diameter (SCSD): the distance between the posterior cortex of the vertebral body and the outer edge of the anterior lamina cortex;

[0041] Sagittal diameter of vertebral body (centrum sagittal diameter, CSD): the distance between the outer edges of the anterior and posterior cortex of the vertebral body;

[0042] The distance between medical borders ...

Embodiment 2

[0064] A comparison of the measured values ​​of the three-dimensional digital model of the 2 lumbar vertebrae with the measured values ​​of the physical anatomy

[0065] 1. Materials and methods:

[0066] 1 material

[0067] 1.1) Specimen selection

[0068] Five dry bone specimens of isolated lumbar vertebrae from normal adults treated with 10% formalin were taken, and their attached soft tissue structures were dissected and removed. All specimens were provided by the Department of Anatomy, Peking Union Medical College.

[0069]1.2) Instruments and equipment

[0070] (1) German WENZEL-LH65 coordinate measuring machine, its measuring range is: 650*750*500mm, its data acquisition method belongs to contact measurement, the digital resolution is 0.1μm, the one-way repeatability should reach 0.1μm, three The overall accuracy is 0.2-0.5μm.

[0071] (2) SIEMENS / Sensation 64-slice CT machine, scanning parameters: slice thickness 2mm, slice spacing 2mm, tube voltage 120kV, current ...

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Abstract

The invention relates to a lumbar vertebra three-dimensional measurement method. The lumbar vertebra three-dimensional measurement method includes that computed tomography (CT) scanning is carried out on a centrum, three-dimensional mode rebuilding is carried out on a CT continuous cross-sectional image, three-dimensional space plane coordinates in a three-dimensional mode are confirmed according to a morphological structure of the centrum, and a measuring method of all parameters is confirmed according to coordinate planes. The measuring method includes measuring the spinal aperture sagittal diameter of lumbar vertebra, the centrum sagittal diameter, the interpedicular distance, the vertebral pedicle width and the vertebral pedicle height. Dissecting parameters of five cases of lumbar vertebra are measured by the method and an entity contact type precision measurement method. The lumbar vertebra three-dimensional measurement method of a lumbar vertebra three-dimensional digital analysis model established based on a CT two-dimensional cross-sectional image has high accuracy and reliability.

Description

technical field [0001] The invention relates to a three-dimensional measurement method of lumbar vertebrae, in particular to a method for measuring vertebrae based on CT scanning technology and three-dimensional reconstruction technology. Background technique [0002] Biomechanical experiments have proved that the stability of the screw-rod system and the ideal clinical effect can only be guaranteed if the screw is accurately placed along the unique anatomical long-axis channel of the pedicle and reaches the ideal depth. This uniqueness makes the operation more difficult. . In order to improve the accuracy of pedicle screw placement, domestic and foreign scholars have carried out many related studies on the screw insertion position, angle and depth. [0003] Through the study of the three-dimensional spatial morphology and internal structure of the pedicle, Panjabi et al. found that the pedicle has great variability in the external shape, long axis direction, and internal s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03G06T17/00
Inventor 吴志宏王以朋孙小虎邱贵兴
Owner PEKING UNION MEDICAL COLLEGE HOSPITAL CHINESE ACAD OF MEDICAL SCI