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Bone trabecula spacing measuring system based on ultrasonic backscattering signals

A technology of ultrasonic backscattering and measurement system, which is applied in the direction of ultrasonic/sonic/infrasonic Permian technology, ultrasonic/sonic/infrasonic data transmission, ultrasonic/sonic/infrasonic diagnosis, etc., which can solve complex calculations and inaccurate Problems such as height and trabecular spacing of the system are large, and the processing flow is simple and the estimation accuracy is high.

Inactive Publication Date: 2018-03-30
NANJING UNIV
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Problems solved by technology

[0009] The problem to be solved by the present invention is: the existing method for estimating the distance between trabeculae based on ultrasonic backscatter signals, or the accuracy is not high, or the calculation is complicated, and the calculation parameters need to be adjusted repeatedly based on experience; the system volume for measuring the distance between trabeculae Large and inconvenient to carry

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  • Bone trabecula spacing measuring system based on ultrasonic backscattering signals
  • Bone trabecula spacing measuring system based on ultrasonic backscattering signals
  • Bone trabecula spacing measuring system based on ultrasonic backscattering signals

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Embodiment Construction

[0025] The present invention is made up of two big modules, one of which is a hardware acquisition module, and the other is a signal analysis module. The overall structural block diagram of the system is as follows figure 1 shown.

[0026] The structure block diagram of the signal acquisition module is as follows: figure 2 shown. The control unit uses FPGA, and the data transmission unit uses USB bus. Under the control of FPGA, the whole module completes the generation of high-voltage excitation pulse, the amplification of backscattered signal, the collection of backscattered signal and the transmission of backscattered signal.

[0027] The power supply of the entire signal acquisition module comes from the USB interface. The 5V of the USB interface is boosted to 9V by MP1542, and then adjusted by LTC4002ES8-8.4 to charge the two strings of lithium batteries built in the module. Two strings of lithium batteries are transformed by TPS5430 to generate 3.3V, 2.5V and 1.2V, wh...

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Abstract

Provided is a bone trabecula spacing measuring system based on ultrasonic backscattering signals. The problems that an existing method is low in measuring accuracy, parameters need to be repeatedly adjusted according to experience, calculation is complicated and a measuring system is not easy to carry are solved. The system comprises a signal collecting module and signal analyzing software. The signal collecting module is composed of a transducer, a high-voltage excitation unit, a signal amplification unit, an analog-digital conversion unit, a main control unit and a data transmission unit. The signal collecting module conducts high-quality obtaining of the ultrasonic backscattering signals under the constraints of the power supply quality and power supply power consumption of a USB interface. The signal analyzing software is composed of a filtering sub-module, an enveloping and extracting sub-module, a peak positioning sub-module and a base frequency estimating sub-module and used forautomatically positioning the space position of bone trabecula and calculating the average spacing of the bone trabecula. The signal analyzing method based on matched filtering is self adaptive to any combinations of an ultrasonic transducer, an excitation system, an amplification system and a collection system, and is high in robustness and easy to implement.

Description

technical field [0001] The invention relates to the technical field of medical ultrasound quantitative measurement. Aiming at the problems of low estimation accuracy, complex calculation method and large measurement system volume in the method of estimating the distance between bone trabeculae based on ultrasonic backscattering signals, an ultrasonic back-scattering method is designed. The system for locating the spatial position of bone trabeculae in the scattering signal and then estimating the average spacing of bone trabeculae can not only measure the average spacing of bone trabeculae, but also obtain the spatial distribution information of bone trabeculae. Background technique [0002] Osteoporosis is a disease caused by a decrease in bone strength, which can lead to the degeneration of bone microarchitecture, leading to an increased probability of fracture. With the aggravation of population aging in our country, osteoporosis will become a more and more serious social...

Claims

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Application Information

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IPC IPC(8): A61B8/08A61B8/00
CPCA61B8/0875A61B8/52A61B8/56
Inventor 何爱军付思东陈仿陈丽丽陆佳汪莹
Owner NANJING UNIV
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