Automatic calibration constant value method of dual-energy X-ray bone mineral density instrument
A bone densitometer, automatic calibration technology, applied in the fields of radiological diagnosis instruments, medical science, diagnosis, etc., to achieve the effect of reducing positioning errors, avoiding manual positioning, and improving accuracy
Active Publication Date: 2021-06-25
NAT INST OF METROLOGY CHINA
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Problems solved by technology
[0008] The main purpose of the present invention is to overcome the defects existing in the existing automatic calibration method and system of bone densitometer, and provide a new automatic calibration method for dual-energy X-ray bone densitometer. The technical issues are technical issues such as the calibration of the projected area of the bone densitometer, the calibration of tissue equivalent materials, and the calibration of the fixed value of bone density, so as to improve the accuracy of bone density measurement and ensure the effective diagnosis of osteoporosis
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[0072] For further elaborating the technical means and effects that the present invention adopts to achieve the predetermined invention purpose, the following is a preferred implementation example of the present invention, the automatic calibration value of a dual-energy X-ray bone densitometer proposed according to the present invention The method, its specific implementation method, steps, features and effects, are described in detail below.
[0073] An automatic calibration and value determination method for a dual-energy X-ray bone densitometer proposed by the present invention is: the X-ray bone densitometer enters a self-calibration program under no-load conditions after starting up. After passing the system stability requirements given by the manufacturer, the system enters the bone density automatic calibration procedure. The main steps of the automatic calibration and value determination method of the dual-energy X-ray bone densitometer are firstly to perform automati...
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The invention relates to an automatic calibration constant value method for a dual-energy X-ray bone mineral density instrument, and the method comprises the following steps: calibrating the projected area of the bone mineral density instrument, calibrating a tissue equivalent background material and calibrating a bone mineral density value by utilizing a regular-shape calibration die body, a simplified profiling calibration die body and control and calculation software in a matching way; the problem that a dual-energy X-ray bone mineral density instrument is poor in accuracy of measuring the bone mineral density value is solved, the accuracy of measuring the bone mineral density value is improved, and the problem of unification of the bone mineral density values is solved. Through the method, the bone mineral density measurement precision can be greatly improved, and the osteoporosis diagnosis and treatment effect is ensured.
Description
technical field [0001] The invention relates to an automatic calibration and value determination method and system for a bone density meter in the field of medical testing instruments, in particular to an automatic calibration and value determination method for an X-ray method for measuring bone density. Background technique [0002] Dual-energy X-ray absorptiometry (DEXA) is the gold standard for determining osteoporosis by the World Health Organization (WHO). The result of dual-energy X-ray absorptiometry is the projected area density aBMD value of the bone. However, due to technical reasons such as different contour recognition algorithms of various manufacturers, the projected area has become the largest source of error in the measurement results. In addition, the rationality of the fitting formula used by various manufacturers in the design of bone densitometers cannot be verified. The above measurement results are inconsistent, resulting in low measurement accuracy of...
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IPC IPC(8): A61B6/00
CPCA61B6/582A61B6/505
Inventor 高明亮刘文丽李成伟万国庆李飞洪宝玉
Owner NAT INST OF METROLOGY CHINA