Hilbert transform-fundamental frequency estimation based method for estimating mean trabecular bone spacing

A trabecular and fundamental frequency technology, applied in the field of medical ultrasound, can solve problems such as large variance of estimation and excessive estimation error

Inactive Publication Date: 2010-11-24
FUDAN UNIV
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] These algorithms have better estimation performance when the experimental signal has a high signal-to-noise ratio and the random scattering amplitude is small, but in the

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hilbert transform-fundamental frequency estimation based method for estimating mean trabecular bone spacing
  • Hilbert transform-fundamental frequency estimation based method for estimating mean trabecular bone spacing
  • Hilbert transform-fundamental frequency estimation based method for estimating mean trabecular bone spacing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The following takes the estimation of the average trabecular spacing of a section of ultrasonic simulation signal as an example to introduce the entire estimation process, and finally compare the estimation results of the three algorithms after changing the parameters of the simulation signal to demonstrate the performance of the algorithm of the present invention.

[0042] 1. The average trabecular spacing estimation process

[0043] An example is given to illustrate the average trabecular spacing estimation algorithm based on Hilbert transform-fundamental frequency estimation. The block diagram of the algorithm is as figure 1 shown. After the Hilbert transform is performed on the simulated ultrasonic backscatter signal, the modulus of the obtained complex signal is the positive envelope of the ultrasonic backscatter signal. The simulated ultrasonic backscatter signal and its positive envelope are shown in Figure 2(a), where The part of the solid line is the simulatio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of medical ultrasound, in particular to a Hilbert transform-fundamental frequency estimation based method for estimating mean trabecular bone spacing. The method comprises the following steps: first, extracting enveloping of an ultrasonic backscattered signal after analog-to-digital conversion by adopting Hilbert transform, and performing down sampling on the enveloped signal; and then, processing the enveloped signal respectively by two fundamental frequency estimation algorithms, namely instantaneous fundamental frequency estimation (EB) and Yin (YIN) based on events, finding out the fundamental frequency of the enveloped signal from a last decision module, and reckoning the mean trabecular bone spacing by the fundamental frequency and known ultrasound transmission speed. The method raises to utilize the method of Hilbert transform-fundamental frequency estimation to study the mean trabecular bone spacing for the first time, and has stronger robustness on changes of white noise, random scatter echo and regular scatter echo, and more accurate estimation on different mean trabecular bone spacing compared with the traditional method for directly estimating the mean trabecular bone spacing.

Description

technical field [0001] The invention belongs to the technical field of medical ultrasound, in particular to a method for estimating the average trabecular distance of cancellous bone. Background technique [0002] With the aggravation of population aging, osteoporosis has become a serious social problem. It will cause the degradation of bone microstructure, thereby reducing bone strength and increasing the chance of fracture. At present, more than 200 million people in the world suffer from osteoporosis, and 20-30% of women suffer from osteoporosis to varying degrees. Currently the most commonly used diagnostic method is dual-energy X-ray (DXA) measurement of bone mineral density (BMD), but it cannot characterize bone microstructure; on the other hand, DXA has the disadvantages of radioactivity and high cost. [0003] Because ultrasound can reflect the microstructure information of bone, the method of using ultrasound to diagnose osteoporosis has attracted the attention of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): A61B8/08
Inventor 他得安杨白丁王威琪
Owner FUDAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap