Bone densitometer is a medical testing instrument that measures human bone mineral and obtains various related data. The mainstream bone densitometers on the market in the early 21st century are divided into two categories: dual-energy X-ray absorptiometry and ultrasonic absorptiometry. Dual-energy X-ray absorptiometry The X-ray absorptiometry obtains two kinds of energy, namely low-energy and high-energy photon peaks, through a certain device through an X-ray tube. After the photon peak penetrates the body, the scanning system sends the received signal to the computer for data processing to obtain the bone mineral content. The instrument can measure bone mass in any part of the body with high accuracy and less harm to the human body. The radiation dose to detect a part is equivalent to 1/30 of a chest X-ray and 1% of CT. There is no problem of radioactive source decay, and it has been gradually developed in major cities in China, and the prospects are promising.
The dual-energy X-ray absorptiometry system consists of an X-ray tube, a collimator, and an X-ray detector. X-ray photons are produced by an X-ray tube, which contains a cathode and an anode, which are enclosed in a vacuum tube. About 99% of the energy of the X-ray tube is dissipated as heat, and less than 1% of the energy becomes X-rays. The X-ray beam is collimated into a narrow fan-shaped beam before it reaches the site being measured. The collimator is used to control and constrain the irradiation field of the imaging beam to ensure that the beam can accurately cover the effective imaging area of the detector. The X-ray beam passes through the subject area and is selectively attenuated by the bone and soft tissue in that area. When the X-ray beam passes through the patient, it hits the X-ray detector, and the intensity of the rays after passing through the body is converted into electrical signals and recorded.
The X-panel 3025/1613 series dynamic flat panel detector independently developed by Haobo adopts amorphous silicon (a-Si) material technology, which has the characteristics of high image quality, large dynamic range and wide range of terminal applications. It has multi-gain program-controlled adjustment gears, which can not only meet the application requirements of high sensitivity, but also meet the requirements of large dynamic range scenarios, and can be widely adapted to the application requirements of medical detection.
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Post time: Jul-14-2022