An Inductive Magnetoacoustic Fast Imaging Method with Single Excitation

Abstract

The invention relates to the field of bio-medical imaging, and discloses a single-shot rapid magneto-acoustic tomography method with magnetic induction. The method adopts a compressive sensing algorithm design module and an acoustic source reconstruction module; the compressive sensing algorithm design module is used for conducting curvelet orthogonal basis sparsification, assessing a compressive sensing matrix of transform point spread functions, solving a constrained optimization problem of a Dantzig selector and reconstructing an image through curvelet transform; and the acoustic source reconstruction module is used for conducting Fourier transform on magneto-acoustic signals generated from single shot, reconstructing sparse signals by virtue of a compressive sensing algorithm, and reconstructing an acoustic source image through curvelet transform and inverse Fourier transform. According to the magneto-acoustic tomography method provided by the invention, through sparse sampling, the optimal number of sensors can be selected, and a data collection capacity and handling time can be reduced; meanwhile, on the basis of the properties of the compressive sensing algorithm, data reconstruction in a single-shot mode is achieved, so that the reliability and the stability of the data are improved and an imaging system is simplified; and the magneto-acoustic tomography method has a quite high industrialization prospect.

Description

technical field [0001] The invention relates to the field of biomedical imaging, in particular to an inductive magnetoacoustic fast imaging method for single excitation. Background technique [0002] At present, the known inductive magnetoacoustic imaging method is a kind of non-invasive ultrasound and its electrical impedance imaging. The induced current is generated in the organism, and the induced current generates time-varying Lorentz force under the action of the static magnetic field, and the Lorentz force triggers the vibration of the organism and spreads outward. The ultrasonic sensor collects the acoustic signal containing the internal information of the organism and applies the corresponding algorithm to reconstruct the conductivity distribution image in the organism. The inductive magnetoacoustic imaging method is still in the initial stage of transformation from laboratory research to practical use. [0003] As is known, the existing inductive magneto-acoustic ...

AI Technical Summary

Problems solved by technology

[0010] Aiming at the shortcomings of long imaging time and complicated operation in the prior art, the present invention provides a single excitation induction magnetoacoustic fast imaging method

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