Low-temperature plasma-induced thermo-acoustic imaging method

Abstract

The invention discloses a low-temperature plasma-induced thermo-acoustic imaging method and particularly relates to a pulse low-temperature plasma-induced thermo-acoustic coupling functional imaging method in the field of biomedical imaging. A nanosecond pulse-excited 'low-temperature plasma jet' acts on a biological tissue, and low-temperature plasma induces pulse energy to the inside of the tissue; and electrical impedance of a normal tissue and a pathological tissue and absorption coefficients on a jet spectrum are different, so that absorption on energy of the plasma jet is also different. The biological tissue absorbs the energy of the plasma jet to generate a heat effect, transient thermal expansion is caused, and a thermo-elastic high-frequency ultrasonic signal is excited. The signal carries the information of the electrical impedance in the tissue and the absorption strength on the jet spectrum; a heat sound source image related to the electrical impedance and the spectrum absorption coefficient can be obtained in micron scale by adopting a sound source reconstruction algorithm; and thus, high-resolution and high-contrast biological tissue medical imaging is provided for early diagnosis of a disease.

Description

technical field [0001] The invention relates to a low-temperature plasma-induced thermoacoustic imaging method, in particular to a pulsed low-temperature plasma-induced high-resolution functional imaging method suitable for biomedical applications. Background technique [0002] Medical imaging technology, especially functional medical imaging technology, occupies an important position and role in health engineering and early diagnosis of diseases. At present, the imaging methods used in clinical diagnosis of diseases, such as X-ray, CT, ultrasound, and MRI, can only detect lumps of a certain size, resulting in most patients missing the best time for early detection and early treatment of tumors. The methods and techniques of early diagnosis have always been the areas of concern and key research at home and abroad. [0003] The "electromagnetic (optical) thermoacoustic imaging" of biological tissue is sensitive to the dielectric spectrum of biological tissue, and has the cha...

AI Technical Summary

Problems solved by technology

The current clinical imaging methods for disease diagnosis, such as X-ray, CT, ultrasound, and MRI, can only detect tumors of a certain size, causing most patients to miss the best time for early tumor detection and early treatment. Therefore, research and development of early screening and The methods and technologies of early diagnosis have always been the focus of attention and research at home and abroad.

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