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Method for conducting ultrasonic non-injury temperature measurement employing non-linear vocal parameter

A nonlinear acoustic parameter, ultrasonic technology, applied in ultrasonic/sonic/infrasonic diagnosis, applications, thermometers, etc., can solve the problems of not yet practical stage, expensive measurement accuracy, etc., and achieve good sensitivity, high sensitivity, cost saving. Effect

Inactive Publication Date: 2006-09-27
NANJING UNIV
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Problems solved by technology

In addition, there are nuclear magnetic resonance method[6]; impedance imaging method[7]; microwave radiation measurement method[8], etc., but due to the expensive equipment or the limitation of measurement accuracy, they have not yet reached the practical stage.

Method used

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  • Method for conducting ultrasonic non-injury temperature measurement employing non-linear vocal parameter
  • Method for conducting ultrasonic non-injury temperature measurement employing non-linear vocal parameter
  • Method for conducting ultrasonic non-injury temperature measurement employing non-linear vocal parameter

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Experimental program
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Embodiment Construction

[0042] A. The temperature increase caused by the heat source:

[0043] Experimental system such as Figure 5 As shown, the experimental sample is cylindrical, and the sample size is 3 cm in thickness and 2.75 cm in radius. In the experiment, a composite structure ultrasonic transducer is used, which is composed of two parts: a circle and a ring. The center frequency of the circle is 2MHz, which is used for transmitting the transducer, while the center frequency of the ring is 4MHz, which is used for receiving the transducer. energy device. Use a pulse generator (81101A) to modulate the ultrasonic sinusoidal signal with a center frequency of 2MHz, and then amplify the modulated signal through a broadband power amplifier (ENI A150) and then add it to the transmitting transducer as a transmitting signal. The reflected signal is received by the transducer, sampled by a digital oscilloscope, and the data is sent to the computer through the interface for further processing to extr...

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Abstract

This invention relates to a Method for conducting ultrasonic non-injury temperature measurement employing non-linear vocal parameter, wherein, according to the relation between the organization temperature and the strength ratio of base frequency (f0) and second-order harmonic (2f0), using nonlinear sound parameter B / A with high temperature sensitivity sound velocity and sound attenuation coefficient special to human body temperature to measure the temperature variation of bio-organization led by heat source (non-sound source) and ultrasonic source. This invention can improve the ultrasonic treatment effect with HIFU.

Description

1. Technical field [0001] The invention relates to a method for measuring temperature with nonlinear acoustic parameters, that is, a technology for non-destructively measuring the temperature rise of a high-intensity focused ultrasonic field by using nonlinear acoustic parameters in ultrasound. 2. Background technology [0002] The current high-intensity focused ultrasound (HIFU) used to treat tumors uses thermal effects to achieve the purpose of treating tumors. It is very important to measure and control its temperature non-destructively, otherwise it will lead to poor therapeutic effect or harm to the human body. There is currently no formally feasible national standard. [0003] Existing temperature measuring instruments can be divided into two categories: contact type and non-contact type according to the temperature measurement method. Generally speaking, contact temperature measuring instruments are relatively simple, reliable, and have high measurement accuracy; how...

Claims

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Application Information

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IPC IPC(8): G01K11/22
CPCA61B5/01A61B8/5223
Inventor 刘晓宙卢莹龚秀芬章东
Owner NANJING UNIV
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