Radio frequency external electrode with variable electrode equivalent diameter, and radio frequency heat treatment device

Abstract

The invention discloses a radio frequency external electrode with a variable electrode equivalent diameter, and a radio frequency heat treatment device. The technical scheme of the invention is that the electrode comprises a radio frequency external electrode plate component with a controllable equivalent diameter, an electrode body, a coupling water cushion, and one-way cooling circulating water joints, wherein the radio frequency external electrode plate component with the controllable equivalent diameter is formed by arranging a plurality of electrode plates with electrical conductive columns welded on, and gaps between the electrode plates are filled with an electrode plate body material; the small end of the electrode body is matched and fixed with a host of the radio frequency heat treatment device, and the large end of the electrode body is assembled with the radio frequency external electrode plate component and the coupling water cushion; the coupling water cushion is filled with a solution having a human coupling characteristic, and the air within the coupling water cushion is discharged; and the one-way cooling circulating water joints are arranged on the radio frequency external electrode plate component at radial outer positions which are opposite to each other to supply circulating water to the coupling water cushion or discharge the circulating water from the coupling water cushion.

Description

technical field [0001] The invention relates to the field of radio frequency hyperthermia, in particular to a technique for controlling the change of the equivalent diameter of a radio frequency external electrode. Background technique [0002] The most commonly used form of radio frequency hyperthermia in clinical tumor hyperthermia is capacitive hyperthermia. Capacitive hyperthermia uses a pair of upper and lower electrodes to capacitively heat the lesion of the patient. Changes in size, shape, and up and down position. [0003] The electrode plates of commonly used electrodes are circular, figure 1 is the iso-SAR distribution map of uniform muscle tissue in capacitive radiofrequency hyperthermia under different electrode plate configurations. According to the relevant hyperthermia specifications, it is required that 50% of the SAR distribution of the radiofrequency hyperthermia device covers the patient's treatment area. Therefore, a complete radio frequency hypertherm...

AI Technical Summary

Problems solved by technology

[0004] In clinical use of such a radio frequency hyperthermia device, the operator needs to replace electrodes with different diameters according to the treatment needs of different patients, which is relatively cumbersome in operation.

Images