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Individual-impedance-based radio frequency heating temperature field prediction method and system

A technology of radio frequency heating and prediction method, applied in the field of biomedical engineering, can solve problems such as deviation, achieve the effect of improving speed and accuracy, speeding up calculation speed, and simplifying calculation process

Active Publication Date: 2018-11-16
MAGI CO LTD
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Problems solved by technology

[0004] However, the inventors of the present application found that during the simulated RFA treatment process, the calculation results of the existing modeling methods often have a large deviation from the actual situation

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  • Individual-impedance-based radio frequency heating temperature field prediction method and system

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Embodiment Construction

[0038] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that the technical solutions claimed in this application can be realized even without these technical details and various changes and modifications based on the following implementation modes.

[0039] The following outlines some innovations of the application:

[0040] The inventors of the present application found that in simulating the RFA treatment process, the existing modeling methods usually do not consider the individual differences between patients, set the conductivity of the tissue as a constant value, or set the negative electrode position at the bottom of the liver, The simulation process only considers the electrical conductivity of the liver. However, in actual clinical operations, the position of the negative electrode is often attached to the individual's buttocks or back, so...

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Abstract

The invention relates to the field of biomedical engineering, and discloses an individual-impedance-based radio frequency heating temperature field prediction method and system. The temperature distribution prediction rate and accuracy are greatly increased. The method comprises the steps that a first area is built; the ablation needle position is obtained, and a second area is built in the firstarea by taking the ablation needle as the center; the electric conductivity in the second area keeps constant, the electric conductivity of the first area is adjusted, and impedance between the ablation needle and a terrestrial pole is consistent with individual real impedance actually measured by a treatment system; a combination of the first area and the second area is subjected to mesh generation, coupling calculation is conducted by means of a radio-frequency field model and a biological heat transfer model, and then temperature field spatio-temporal information is obtained.

Description

technical field [0001] This application relates to the field of biomedical engineering, in particular to the prediction technology of radio frequency heating temperature field based on individual impedance. Background technique [0002] With the development of modern imaging technology and computerized surgical guidance technology, minimally invasive thermal ablation technology has been widely valued in tumor treatment. Percutaneous radiofrequency ablation (RFA) is a hyperthermia alternative to surgical resection of liver cancer. During RFA treatment, when ions and polar molecules oscillate in the alternating magnetic field, high-frequency alternating current will cause frictional heating, which will cause the temperature to rise above 60°C, causing transient denaturation of proteins and nuclei, and direct necrosis of tumor cells or apoptosis. [0003] The key to effective RFA treatment is to precisely control the size and shape of the ablation zone (thermocoagulation zone)...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F2119/08G06F30/23G16H20/40G16H50/50
Inventor 张爱丽秦方雨张康伟徐学敏
Owner MAGI CO LTD
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