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Measurement device and detection method for bone density

A measuring device and a technology for bone density, applied in the field of medical devices, can solve the problems of long-distance propagation attenuation, small amplitude, and the first arriving wave cannot be well reflected, so as to improve the measurement accuracy, accurately measure the bone density, The effect of measuring convenience

Inactive Publication Date: 2012-02-29
JIANGSU UNIV
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  • Application Information

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Problems solved by technology

The traditional axial propagation technology uses the first arrival wave to calculate the propagation delay. However, when the ultrasonic wave length is smaller than the thickness of the cortical bone, the first arrival wave cannot well reflect the thickness of the cortical bone, the amplitude is small, and the long-distance propagation attenuation Too big and other defects

Method used

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  • Measurement device and detection method for bone density
  • Measurement device and detection method for bone density
  • Measurement device and detection method for bone density

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Embodiment

[0034] First divide the distance L between the transmitting probe 6 and the transmitting probe 7 into n equal parts, and then follow the steps below:

[0035] (a) Put the arm to be tested into the arm measurement slot 4, start the stepper motor 12, and set the position of the receiving probe 8 at the L / n cm away from the transmitting probe 6;

[0036] (b) Lock the stepper motor 12, the transmitting probe 6 and the transmitting probe 7 transmit ultrasonic slow waves in sequence, and the receiving probe 8 converts the ultrasonic slow waves received twice into electrical signals and sends them to the subsequent module for processing;

[0037] (c) The stepper motor 12 is started again, and the receiving probe 8 is moved to the direction of the transmitting probe 7 by L / n cm, and then step (b) is performed;

[0038] (d) Jump to step (c) and repeat n-3 times.

[0039] According to the above measurement steps, the ultrasonic receiving probe 8 has a total of n-1 test positions, each ...

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Abstract

The invention discloses a measurement device and a detection method for detecting bone density by using an axial quantitative ultrasonic method in the technical field of medicinal instruments. A shell is fixedly connected with one end of a spring set, the other end of the spring set is connected with a side pad, an arm measurement groove is formed in the upper space of the side pad, and the opposite side of the side pad is provided with two same transmitting probes and a receiving probe; the two transmitting probes and the receiving probe are positioned on the same plane on one side of a partition board, and the bottom end of the receiving probe is connected with a transmission component; and a measured arm is put into the arm measurement groove, the spring set drives the side pad to movehorizontally in the arm measurement groove, a rotating shaft of a step motor drives a screw to rotate so as to drive the receiving probe to move, the two transmitting probes transmit ultrasonic slow wave in turn, and the receiving probe converts the ultrasonic slow wave received twice into electrical signals for subsequent processing. The device and the method avoid the measurement error caused by the thickness of soft tissues on the bone, accurately position the position of the receiving probe, and improve the measurement precision.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a measurement device and a detection method for detecting bone density by an axial quantitative ultrasonic method. Background technique [0002] Quantitative ultrasound technology has been studied in the detection of osteoporosis for many years. It can predict the occurrence of fractures clinically. It has the advantages of non-invasive, portable, wide application range, and good repeatability. At present, the ultrasonic transverse propagation technology is the most widely used. The transverse propagation technology uses two piezoelectric transducers, one of which is used as a transmitter and the other is used as a receiver. side to measure. This method measures the slope relationship between ultrasonic frequency and amplitude attenuation, that is, broadband ultrasonic attenuation coefficient and ultrasonic propagation velocity. When the ultrasound propagates on both si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/00
Inventor 张荣标金振俊黄义振张业成
Owner JIANGSU UNIV
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