CT-based three-dimensional deformation measurement system and method of tissue or material

Abstract

The invention relates to a CT (computed tomography)-based tissue or material interior three-dimensional deformation measuring system and measuring method, belonging to the technical field of novel detecting instruments for medical treatment and scientific research. The method comprises the following steps: 1) putting a minitype mechanical loading device fixed with a specimen into a CT scanning cavity, wherein the test cavity support of the minitype mechanical loading device is a roentgenolucent support; 2) respectively scanning the three-dimensional image of the specimen during forceful loading and forceless loading; and 3) carrying out image correlation analysis on the data of the two scanned three-dimensional images to obtain a three-dimensional deformation field in the specimen. The system comprises a minitype mechanical loading device, a CT machine and a data processing unit, wherein the test cavity support of the minitype mechanical loading device is a roentgenolucent support. Compared with the prior art, the invention can provide reliable testing foundation for observing microscopic imaging and biomechanical experiments in real time, and has the characteristics of simple structure, high reliability and wide application range.

Description

technical field [0001] The invention relates to a three-dimensional imaging system based on CT or micro-CT, in particular to a system and measurement method for loading and deformation measurement inside tissues or materials, and belongs to the technical field of new medical and scientific research detection instruments. Background technique [0002] For a long time, the functions of medical CT and high-resolution micro-CT have been limited to the observation of images of tissues and organs. However, how to realize the synchronization of CT scanning and loading, so as to use the principle of ordinary CT or micro-CT imaging to observe the deformation inside the material, The process of stress or fracture, and through the three-dimensional correlation analysis of CT images before and after loading, the measurement of three-dimensional microscopic deformation inside various materials has not been solved, especially the measurement and analysis of the skeletal system, because it ...

AI Technical Summary

Problems solved by technology

[0005] However, at present, the loading device for mechanical testing of materials is usually too large to be placed in medical CT and micro-CT for real-time mechanical loading; at the same time, because the loading device is mainly composed of metal, it produces serious metal artifacts, and the specimen cannot be obtained Clear imaging data

Therefore, none of the existing equipment can be directly applied to medical CT, especially Mirco-CT for real-time CT scanning under loading.

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