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Bone CT value and elastic modulus relation determination method and test loading device thereof

A technology for determining the elastic modulus and relationship, which is applied in the field of orthopedic medicine, can solve the problems of the original structure of the damaged sample, the difference between the measured value and the actual value, and achieve the effect of improving accuracy

Active Publication Date: 2017-02-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Description
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Problems solved by technology

Sheet samples need to be cut to obtain, the original structure of the sample may be damaged during the cutting process, resulting in a difference between the measured value and the actual value

Method used

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  • Bone CT value and elastic modulus relation determination method and test loading device thereof
  • Bone CT value and elastic modulus relation determination method and test loading device thereof
  • Bone CT value and elastic modulus relation determination method and test loading device thereof

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Embodiment Construction

[0027] The specific embodiment of the present invention will be described with reference to the accompanying drawings.

[0028] The method for determining the relationship between bone CT value and elastic modulus includes the following process:

[0029] (1) Obtain a bone sample, and perform necessary processing on the sample before performing the determination;

[0030] (2) Fix the sample on the test bench, place it in the micro-CT, scan the sample under the condition of no loading, obtain the three-dimensional image of the bone under the micro-CT and output it in DICOM format; the three-dimensional image is as follows: figure 1 shown.

[0031] (3) According to the force characteristics of the measured bone sample, estimate the load size, start the loading device to deform the sample, scan, obtain the three-dimensional image of the deformed sample under micro-CT and output it in DICOM format;

[0032] (4) Carry out volume image analysis on the three-dimensional image data o...

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Abstract

The invention relates to the medical field of bones and particularly relates to a bone CT value and elastic modulus relation determination method and a test loading device thereof. Under a precondition of not destroying bone tissues, an accurate relation between the CT value and the bone elastic modulus is determined, and a loading device (with a caliber of 10 cm) of a large testing range and suitable for being used in a micro-CT is established, so that large joints such as femur head can be disposed, and the sample integrity is ensured; and by a finite element inversion calculation method, the elastic modulus of a bone tissue corresponding to a CT sweeping solid is obtained. The bone CT value and elastic modulus relation determination method provided by the invention is a more correct CT value and bone elastic modulus relation determination method, which provides more accurate material valuation for bone stress simulative research, improves accuracy of simulative calculation, and can be more accurately applied to clinic prediction and treatment scheme programming.

Description

technical field [0001] This patent relates to the field of bone medical treatment, specifically a method for determining the relationship between bone CT value and elastic modulus and a test loading device thereof. Background technique [0002] The diagnosis of bone diseases is mostly based on imaging, such as computed tomography (CT) and magnetic resonance imaging (MRI). Imaging data can provide doctors with morphological parameters of bones, but lacks the description of bone mechanical functions. Therefore, it has limitations in disease diagnosis, disease progression prediction, and rehabilitation prediction. Simulation research based on imaging morphological data and computational mechanics can provide mechanical functional parameters of bones, which is of great help to predictive research, but the accuracy of mechanical functional research mainly depends on three aspects: the accuracy of the individual model, Accuracy of calculation methods and accuracy of material assi...

Claims

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Application Information

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IPC IPC(8): G06T19/20G06T7/10G06T15/00G06T7/40A61B6/03A61B6/00
CPCA61B6/032A61B6/5205A61B6/5211G06T7/40G06T15/005G06T19/20G06T2207/10081G06T2207/30008G06T2211/40
Inventor 陈端端岳轶翔徐继东
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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