Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Resistivity reconstruction method for magneto-thermoacoustic tomography

A magneto-thermoacoustic and resistivity technology, applied in the directions of ultrasound/sonic/infrasonic image/data processing, acoustic diagnosis, infrasonic diagnosis, etc.

Active Publication Date: 2015-03-25
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the existing magneto-thermoacoustic imaging method for resistivity distribution, and propose a reconstruction method for reconstructing resistivity distribution using thermoacoustic source distribution

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
  • Resistivity reconstruction method for magneto-thermoacoustic tomography
  • Resistivity reconstruction method for magneto-thermoacoustic tomography
  • Resistivity reconstruction method for magneto-thermoacoustic tomography

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] The imaging principle of magneto-thermoacoustic imaging on which the present invention is based is as follows: the excitation coil is used to apply MHz current excitation to the conductive object, Joule heat is generated in the conductive object, and then an ultrasonic signal is generated, and the ultrasonic transducer is used to receive the ultrasonic signal. The ultrasonic signal is processed and collected, and after the amplified and filtered ultrasonic signal is obtained, the image reconstruction algorithm is used to obtain the resistivity image of the conductive object.

[0035] The resistivity reconstruction process of the magneto-thermoacoustic imaging of the present invention includes four steps. The first step is to obtain a high-resolution magneto-thermoacoustic signal; the second step is to use the acquired magneto-thermoacoust...

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

A resistivity reconstruction method for magneto-thermoacoustic tomography includes the steps of 1, applying MHz current excitation to a conductive object (3) through an excitation coil (2), and allowing the conductive object (3) to generate joule heat under the action of induction current so as to generate a thermoacoustic signal; coupling the thermoacoustic signal to an ultrasonic transducer (4) through coupler; after the ultrasonic transducer (4) receives an ultrasonic signal, performing pre-amplification, filtration, secondary amplification and the like to the ultrasonic signal with an ultrasonic signal processing and acquiring subsystem, storing the ultrasonic signal, and acquiring a high-resolution magneto-thermoacoustic signal; 2, reconstructing a thermoacoustic source distribution through the acquired magneto-thermoacoustic signal; 3, reconstructing a vector potential spatial component; and 4, solving resistivity through the vector potential spatial component.

Description

technical field [0001] The invention relates to a method for reconstructing a conductivity image, in particular to a method for reconstructing resistivity of magneto-thermoacoustic imaging. Background technique [0002] At present, the sensitivity and spatial resolution of traditional electrical impedance imaging technology are not high, mainly because electrical impedance imaging usually uses electromagnetic waves with low frequency as excitation. Since the wavelength is much larger than the imaging object, the electromagnetic field detection contrast is high, but the resolution is low. Needless to say, a single field has its physical limitations. Therefore, multi-physics imaging technology has received more and more attention, that is, one physical field acts on biological tissue and converts it into another physical field for detection. One physical field provides resolution, and the other provides contrast. , achieving simultaneous improvements in contrast and resolutio...

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
Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/053A61B8/08
CPCA61B5/0093A61B5/053A61B8/0833
Inventor 刘国强夏慧夏正武李士强杨延菊刘宇
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com