System Calibration Method for Broadband Ultrasonic Attenuation Measuring Instrument

A technology of attenuation measurement and attenuation coefficient, applied in ultrasonic/sonic/infrasonic Permian technology, ultrasonic/sonic/infrasonic image/data processing, analysis of solids using sonic/ultrasonic/infrasonic waves, etc. It may offset the problems of fat and the inability of the measuring amplifier to effectively amplify the signal, so as to reduce the frequency characteristic error and simplify the amplifier circuit.

Active Publication Date: 2017-06-06
HEFEI UNIV OF TECH
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Problems solved by technology

[0005] However, there are two defects in this calibration method: First, the influence of water or fat on the signal is not considered effectively, so the system calibration cannot offset the influence of fat in human tissue on the measurement; second, because the ultrasonic signal enters the measurement circuit with almost no attenuation , may make the measurement amplifier enter a saturated state and cannot effectively amplify the signal, resulting in signal distortion

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  • System Calibration Method for Broadband Ultrasonic Attenuation Measuring Instrument
  • System Calibration Method for Broadband Ultrasonic Attenuation Measuring Instrument
  • System Calibration Method for Broadband Ultrasonic Attenuation Measuring Instrument

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Embodiment Construction

[0036] like figure 1 As shown, the steps of calibrating bone density measurement system and measuring BUA in the present invention are as follows:

[0037] (1) BUA of preset bone density standard samples s,w

[0038] BUA due to standard samples s,w is known, so the BUA of the bone density standard sample can be entered through the input device s,w Or store BUA directly in the system s,w parameter.

[0039] (2) Measure the frequency characteristics of bone density standard samples

[0040] like figure 2 As shown, using the transmission method, the ultrasonic transmitting probe, the standard sample and the ultrasonic receiving probe are arranged in a straight line in sequence, the ultrasonic transmitting probe emits ultrasonic pulses, the ultrasonic signal propagates in the bone density standard sample, and the ultrasonic receiving probe receives The ultrasonic signal of the sample, and then do Fourier transform to the signal to obtain the frequency characteristic V of t...

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Abstract

The invention discloses a system calibrating method of a broadband ultrasonic attenuation measurement apparatus. The system calibrating method is characterized in that the broadband ultrasonic attenuation measurement apparatus detects frequency characteristics of a signal crossing through a bone mineral density standard sample and frequency characteristics of a signal crossing through a bone mineral density detected sample; and then calculates and obtains a bone tissue ultrasonic attenuation coefficient of the bone mineral density detected sample in relative to the bone mineral density standard sample; at last, by combining with the bone tissue ultrasonic attenuation coefficient of the bone mineral density standard sample, the bone tissue ultrasonic attenuation coefficient of the bone mineral density detected sample is obtained. According to the system calibrating method of the broadband ultrasonic attenuation measurement apparatus, an ultrasound bone mineral density standard measurement module is used for calibrating; thus the method can effectively avoid influence of water and fatty on measurement, reduce the amplifier frequency characteristic bias caused by inconsistent dynamic scale, and simplify an amplifier circuit.

Description

technical field [0001] The invention belongs to the field of medical ultrasound applications, and more specifically aims at the problems existing in the system calibration in the existing ultrasound bone density measurement, and proposes a new system calibration method to improve the measurement precision of the ultrasound bone density. Background technique [0002] Ultrasound bone densitometry is to use the change of the acoustic parameter of Broadband Ultrasound Attenuation (BUA) in the propagation of bone media to measure the density of bone minerals and further judge the osteoporosis status of the examinee. This method has the advantages of no radiation and low cost. [0003] The BUA measurement method is not complicated. Usually two ultrasonic probes are used, one is the ultrasonic transmitting probe and the other is the ultrasonic receiving probe. During the measurement process, the ultrasonic transmitting probe, the measuring sample, and the ultrasonic receiving pro...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/08G01N29/04
Inventor 彭虎李小锐于成龙韩志会郑驰超张世宏高志荣
Owner HEFEI UNIV OF TECH
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