A magnetoacoustic electric imaging device based on laser ultrasound

Abstract

A laser-ultrasonic-based magnetoacoustic-electric imaging device includes a laser-ultrasonic excitation module, a detection and reconstruction module, and a control and synchronization module. The control and synchronization modules are respectively connected with the laser ultrasonic excitation module and the detection and reconstruction module. The laser ultrasonic excitation module generates ultrasonic signals; the detection and reconstruction module obtains the electrical parameter image of the target imaging body; the control and synchronization module controls the magnetoacoustic electric imaging device to work in unison. The pulsed laser emitted by the pulsed laser is attenuated or filtered by the optical filter, then enters the laser beam adjustment system for adjustment, and then enters the laser ultrasonic excitation system, and is transformed into an ultrasonic beam through photoacoustic conversion. The ultrasonic beam is combined with the static magnetic field to generate a local electric field source in the target imaging body, and the induced electrical signal is detected through the non-contact detection coil, and then processed by the weak signal processing subsystem and image reconstruction to obtain the reconstructed image of the target imaging body.

Description

technical field [0001] The invention relates to a magnetoacoustic electric imaging device. Background technique [0002] Electrical impedance imaging using tissue electrical properties has the technical advantages of non-destructive and functional imaging. It is a new generation of medical imaging methods after morphological and structural imaging. It is of great value for life science research and early diagnosis of diseases. Research and clinical provide a new kind of diagnostic information. On the one hand, when the biological tissue has early lesions and has not yet changed its morphological structure, the charge amount and spatial distribution of various chemical substances in the biological tissue will first change, which is manifested macroscopically as the electrical charge of the biological tissue at the lesion. Features: The electrical impedance, conductivity, and dielectric constant change, so the tissue lesion can be detected non-destructively by imaging the ele...

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