CT assisted bone imitated producing artificial bone method

An artificial bone and bone imitation technology, which is used in bone implants, 3D image processing, medical science and other directions, can solve the problems of large errors in fitting, difficult to achieve accuracy, and low artificial bone accuracy, and achieve fast speed. , reduce human-computer interaction, the effect of fast measurement

Inactive Publication Date: 2005-01-12
TSINGHUA UNIV
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Problems solved by technology

[0003] The main disadvantages of this method are: first, the measurement cannot measure the internal structure of the bone; second, it is very difficult to manually measure the complex surface of the bone to obtain enough data sets; third, it is very difficult to fit the measured discrete data of the imitation bone Creating a vector CAD model requires a lot of human-computer interaction work, and the fitting has a large error. This method is limited to only designing the shape of the skeleton, and the internal geometric shape is often impossible to measure. It is difficult to establish a model that meets the physical measurement The accuracy of the artificial bone is not high, resulting in low precision of the artificial bone

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  • CT assisted bone imitated producing artificial bone method
  • CT assisted bone imitated producing artificial bone method
  • CT assisted bone imitated producing artificial bone method

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[0014] A method of CT-assisted bone imitation manufacturing artificial bone proposed by the present invention is described in detail in conjunction with the accompanying drawings and embodiments as follows:

[0015] This embodiment includes the following steps:

[0016] Step 1: Take a long bone of a cow as a bone prototype, and use micro-focus or small-focus X-CT to obtain a CT tomographic image of the bone, such as figure 1 Shown is a one-layer CT tomographic image of the bone. In the figure, the bone is a structure with complex shape, internal shape and small holes. Three-dimensional CT is used for overall measurement.

[0017] The second step: each CT tomographic image obtained in the first step is binarized with the optimal threshold method to obtain a new clear image, and the CT tomographic image after binarization is as follows: figure 2 As shown, only two gray scales of black and white are reserved. In the figure, the black ones represent the positions with substances...

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Abstract

A Ct aided bone copying method for preparing artificia bone includes scanning original bone by Ct machine to obtain the information about geometric profile of the bone, internal 3D porous structure and 3D density, quantizing the 3D information image to obtain a binary image, inputting ito a fast shaper, and making the artifial bone by stacking the 3D images.

Description

technical field [0001] The invention belongs to the technical field of bone imitation manufacturing artificial bone, in particular to a method for CT-assisted bone imitation manufacturing artificial bone. Background technique [0002] In the method for manufacturing artificial bone with the rapid prototyping method at present, what adopt is the measuring method such as manual measurement and coordinate measuring machine, establish the CAD model of object prototype, then import the CAD model into the manufacturing method of rapid prototyping machine. The specific steps are as follows: first, the discrete data of the bone imitation is obtained by manual measurement and three-coordinate measuring machine; second, the curve and surface fitting are carried out according to the discrete data to establish the CAD vector model of the bone imitation; third, the bone imitation bone is The CAD model is input into the rapid prototyping machine for manufacturing. [0003] The main disad...

Claims

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Application Information

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IPC IPC(8): A61F2/28G06T15/00
Inventor 田杰谟王贤刚张朝宗郭志平王晨董利民
Owner TSINGHUA UNIV
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