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Ultrasonic method and system for evaluating temperature change based on nonlinear thermal expansion

A temperature change, ultrasonic system technology, applied in thermometers, thermometers with physical/chemical changes, thermometers with directly sensitive electrical/magnetic components, etc., can solve the problems of large-scale deployment, small evaluation errors, and complex solutions and other problems, to achieve the effect of easy large-scale deployment, small evaluation error, and strong readability

Active Publication Date: 2020-06-12
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the complex schemes in the prior art, high cost, and large errors, which are not conducive to large-scale deployment, the present invention provides an ultrasonic method and system for evaluating temperature changes based on nonlinear thermal expansion, which can realize low-cost, The effect is easy to deploy on a large scale, and the evaluation error is small, and the readability is strong

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  • Ultrasonic method and system for evaluating temperature change based on nonlinear thermal expansion
  • Ultrasonic method and system for evaluating temperature change based on nonlinear thermal expansion
  • Ultrasonic method and system for evaluating temperature change based on nonlinear thermal expansion

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Embodiment 1

[0050] The present invention builds a nonlinear model of the ultrasonic temperature evaluation algorithm based on the nonlinearity of the thermal expansion effect of biological tissue and the nonlinearity of the sound velocity change, utilizes the B-ultrasound original echo signal, and combines the application of the physiological gating algorithm noise reduction technology to achieve high-precision Measure temperature changes; and provide visual results. First, construct the corresponding detection system, such as figure 1 As shown, the heating probes 5 and 6 connected to the heating devices 4 and 7 are used to heat the biological tissue 3, and the imaging probe 2 of the ultrasonic diagnostic instrument 1 is used to perform a B-scan on the biological tissue 3. The heating devices 4 and 7 and the ultrasonic diagnostic instrument 1. It is controlled by the control system 8, and the control system 8 is controlled in a wireless or wired manner. The control system 8 can be a compu...

Embodiment approach

[0072] The specific implementation is as follows, taking focused ultrasonic heating as an example, the method steps are as follows:

[0073](1) Using the imaging probe 2 of the ultrasonic diagnostic apparatus 1 to perform B-scan imaging on the biological tissue 3 , and continuously output unprocessed original RF signals in time sequence. Using heating probes or focusing probes to locally heat the biological tissue corresponding to the central area of ​​the image; where the heating devices 4 and 7 are controlled by the computer 8 and the ultrasonic diagnostic apparatus 1 collects data. When the biological tissue is locally heated in this step, either figure 1 In the heating probe, ultrasonic focusing probe can also be used.

[0074] (2) Before the focused probe treatment, use the ultrasonic diagnostic instrument to collect signals of at least 2 physiological movement cycles.

[0075] (3) Select a frame of echo signal at the initial moment of heating as the reference frame, an...

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Abstract

The invention discloses an ultrasonic method and system for evaluating the temperature change based on nonlinear thermal expansion, belongs to the field of ultrasonic detection, and aims to solve theproblem that the temperature rise of a target area cannot be effectively monitored in various methods for treating diseases based on in-vivo tissue heating at present. The invention discloses a methodfor evaluating the temperature change of biological tissues by utilizing B-ultrasonic original echo signals, and the method comprises the following steps of locally heating the biological tissues byusing the methods, such as focused ultrasound, radio frequency, microwaves, etc., imaging the target area by using B-type ultrasound, collecting the original echo signal of the target area, selectinga target frame by using a dynamic frame selection algorithm to suppress the living body noise based on a B-type ultrasound time sequence image, and calculating a time delay image when the ultrasound passes through the tissues; and obtaining a temperature change image according to a nonlinear model of the thermal expansion and the sound velocity. According to the method, the error does not exceed 3DEG C within the temperature rise range of 30 DEG C, the application of the B-ultrasonic temperature rise monitoring technology in thermal therapy is promoted, and the safety and effectiveness of thermal therapy can be remarkably improved.

Description

technical field [0001] The present invention relates to the field of ultrasonic testing, more specifically, to an ultrasonic method and system for evaluating temperature changes based on nonlinear thermal expansion. Background technique [0002] In the clinical treatment of tumors, hyperthermia has attracted widespread attention and is considered to be a minimally invasive or non-invasive surgical method of great significance. During treatment, excessive temperature may cause damage to surrounding normal cells, resulting in serious side effects. However, if the temperature does not meet the clinical requirements, it may significantly reduce the curative effect, and even lead to treatment failure. Considering the safety and effectiveness of hyperthermia, it is necessary to monitor the temperature change process of biological tissues during the treatment process. [0003] Compared with other temperature imaging methods, ultrasonic temperature assessment is a promising temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/22G01K7/02G06K9/32G06K9/40
CPCG01K11/22G01K7/02G06V10/30G06V10/25
Inventor 郭霞生范鹏飞章东屠娟
Owner NANJING UNIV
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