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A technology of three-dimensional measurement and lumbar spine, applied in image data processing, 3D modeling, instruments, etc., can solve problems such as formulating measurement specifications for 3D reconstruction models
Active Publication Date: 2014-12-24
PEKING UNION MEDICAL COLLEGE HOSPITAL CHINESE ACAD OF MEDICAL SCI
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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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Embodiment 1
[0031] Embodiment 1 Lumbar three-dimensional digital measurement method and examples
[0032] 1. Materials and methods:
[0033] 1. Materials
[0034] 1.1) Specimen selection
[0035] One normal adult isolated dry bone specimen of lumbar spine treated with 10% formalin was taken, and its attached soft tissue structures were dissected and removed. The specimens were all provided by the Department of Anatomy, Peking Union Medical College.
[0040] Spinal canal sagittal diameter (SCSD): the distance between the posterior cortex of the vertebral body and the outer edge of the anterior cortex of the lamina;
[0041] 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 of pedicles (DMBP): the distance between the...
Embodiment 2
[0064] Implementation 2 Comparison of the measured values of the three-dimensional digital model of the lumbar spine and the measured values of the solidanatomy
[0065] 1. Materials and methods:
[0066] 1 material
[0067] 1.1) Specimen selection
[0068] Five normal adult isolated lumbar bone dry bone specimens treated with 10% formalin were taken, and the attached soft tissue structures were dissected and removed. The specimens were all provided by the Department of Anatomy, Peking Union Medical College.
[0069]1.2) Instruments and equipment
[0070] (1) German WENZEL-LH65 three-coordinate measuring machine, its measurement range is: 650*750*500mm, its data acquisition method belongs to contact measurement, the digital resolution is 0.1μm, and the one-way repeatability is up to 0.1μm. The comprehensive precision reaches 0.2-0.5μm.
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Abstract
The invention relates to a lumbarvertebra three-dimensional measurement method. The lumbarvertebra 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 lumbarvertebra, 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 efficacy can be guaranteed only when the screw is accurately placed along the only anatomical long-axis channel of the pedicle and reaches the ideal depth. This uniqueness increases the difficulty of the operation . In order to improve the accuracy of pedicle screw placement, scholars at home and abroad have conducted many related studies on the position, angle, and depth of screw insertion. [0003] Panjabi et al. found that pedicles have great variability in external shape, long axis direction, and internal structure through the study of pedicle three-dimensional shape and internal structure. There are st...
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Patent Type & Authority Patents(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
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