Online detection method of focused ultrasonic field

A detection method and technology of focused ultrasound, applied in ultrasonic therapy, measurement of ultrasonic/sonic/infrasonic waves, measurement devices, etc., can solve the problems of complex geometric structure, uneven distribution, and difficulty in online detection of focused ultrasonic sound field, so as to ensure safety. and effectiveness, precise control of the effect

Inactive Publication Date: 2018-07-24
CHONGQING MEDICAL UNIVERSITY
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Problems solved by technology

[0003] However, for different biological tissues, there are individual differences in the depth of HIFU irradiation and tissue characteristics, and there are certain limitations in using the same model to describe complex biological tissues. Chinese invention patent CN 103143126 A, the patent name is "biological tissue The method of linear HIFU sound field determination” in which, aiming at the particularity of biological tissues, the Khokhlov-Zabolotskaya-Kuznetsov (KZK) equation was modified by using fractional derivatives, which proved the relationship between sound attenuation and sound velocity with frequency when sound waves propagate in biolo

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  • Online detection method of focused ultrasonic field
  • Online detection method of focused ultrasonic field
  • Online detection method of focused ultrasonic field

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[0032] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0033] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the compo...

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Abstract

The invention provides an online detection method for a focused ultrasonic field. The method comprises that ultrasonic signals are emitted and received, corresponding time delay and signal amplitude change are obtained, the sound speed and sound attenuation are calculated, a sound speed and attenuation characteristic distribution function of a biologic tissue in a treatment area can be obtained accurately in real time, and a sound field is reconstructed via a biologic layered medium model and an SBE equation. Thus, the focusing position and the sound intensity of a focus can be controlled accurately, and it is fully ensured that HIFU treatment is safe and effective.

Description

technical field [0001] The invention relates to the technical field of sound field detection, in particular to a method suitable for on-line detection of sound fields in complex biological tissues. Background technique [0002] High Intensity Focused Ultrasound (HIFU), as a new non-invasive treatment technology, has been applied to the ablation treatment of various solid tumors such as uterine fibroids, prostate cancer, liver cancer, etc., and has attracted increasing attention . Its basic principle is to focus the low-energy ultrasound emitted by the focused ultrasound transducer into the body to form a region with high energy concentration, and use the thermal mechanism and cavitation mechanism to make the diseased tissue in the region warm up to above 60°C, resulting in irreversibility. Coagulation necrosis while leaving out-of-focus normal tissue unaffected. For the biological tissue of the acoustic channel, its geometric structure and acoustic characteristics are quit...

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Application Information

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IPC IPC(8): A61N7/02G01H17/00
CPCA61N7/02G01H17/00
Inventor 李发琪刘欢郭成斌王智彪曾德平
Owner CHONGQING MEDICAL UNIVERSITY
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