Medical radio frequency output power adjusting method and system

A technology of radio frequency power and radio frequency output, applied in the medical field, can solve the problems of high power consumption, gasification and carbonization of target tissue, and failure to achieve the effect, and achieve the effect of less high-frequency components

Pending Publication Date: 2021-08-06
杭州象量医疗技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the operation, it is very important whether the output power of the radio frequency treatment system is appropriate or not. If it is too low, the final goal will not be achieved, and if it is too high, the target tissue will be gasified and carbonized, which will also fail to achieve good results.
[0003] Therefore, a technical problem that needs to be urgently solved by those skilled in the art is: how to effectively control the output power of radio frequency, so as to solve the problem that the current large power consumption affects the performance of equipment and treatment

Method used

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  • Medical radio frequency output power adjusting method and system
  • Medical radio frequency output power adjusting method and system
  • Medical radio frequency output power adjusting method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment provides a method for adjusting medical radio frequency output power, such as figure 1 shown, including:

[0039] S1. Obtain the radio frequency power signal output by the power amplification module;

[0040] S2. Judging whether the power of the output radio frequency power signal is less than a preset threshold, if not, then adjusting the power of the radio frequency power signal through a power switch control signal adjustment method; if so, adjusting the power of the radio frequency power signal through a voltage adjustment method;

[0041] S3. Input the radio frequency power signal corresponding to the adjusted power into the power amplifier for processing, and the power amplifier outputs the processed radio frequency power signal.

[0042] Such as figure 2 Shown is a schematic diagram of the transmission framework of a medical radio frequency output power adjustment method, including a voltage conversion / regulation module, a power amplification m...

Embodiment 2

[0060] This embodiment provides a method for adjusting medical radio frequency output power, which is different from Embodiment 1 in that:

[0061] Such as Figure 3-4 As shown, this embodiment adopts a combination of phase-shifted full-bridge driving and voltage driving to regulate power.

[0062] Such as image 3 Shown is the drive circuit diagram of the phase-shifted full bridge. In the figure, DRV_A, DRV_B, DRV_C, and DRV_D are the drive signals of the four bridge arms, and V_RF is the DC input power supply of the power amplifier circuit.

[0063] The drive signal DRV_A is connected to the HI pin of the chip U1

[0064] The chip U1 controls the switch driving of the bridge arms DRV_A and DRV_B, and the chip U2 controls the switch driving of the bridge arms DRV_C and DRV_D.

[0065] The two pairs of complementary PWM signals DRV_A, DRV_B, DRV_C, and DRV_D can be generated by UCC3895, and U1 and U2 can be UCC27201 of Texas Instruments. SiR122DP can be selected for Q1, Q2...

Embodiment 3

[0079] This embodiment provides a medical radio frequency output power adjustment system, including:

[0080] An acquisition module, configured to acquire the radio frequency power signal output by the power amplification module;

[0081] The first judging module is used to judge whether the power of the output radio frequency power signal is less than a preset threshold;

[0082] The output module is used to input the radio frequency power signal corresponding to the adjusted power into the power amplifier for processing, and the power amplifier outputs the processed radio frequency power signal.

[0083] Further, it also includes:

[0084] The conversion module is configured to receive the input AC voltage and convert the input AC voltage into a DC voltage.

[0085] Further, the first judging module judges whether the power of the output radio frequency power signal is less than a preset threshold, and if not, adjusts the PWM duty cycle or phase corresponding to the power ...

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Abstract

The invention discloses a medical radio frequency output power adjusting method and system, and the method comprises the steps: S1, obtaining a radio frequency power signal outputted by a power amplification module; S2, judging whether the power of the output radio frequency power signal is smaller than a preset threshold value or not, and if not, adjusting the power of the radio frequency power signal through a power switch control signal adjusting method; if yes, adjusting the power of the radio frequency power signal through a voltage adjusting method; and S3, inputting the radio frequency power signal corresponding to the adjusted power into a power amplifier for processing, and outputting the processed radio frequency power signal by the power amplifier. According to the invention, quick response under high power and good output waveform (closer to sine wave) during low-power output are maintained. When the output waveform is close to a sine wave, high-frequency components are few, and an accurate sampling result can be obtained by using relatively low sampling frequency.

Description

technical field [0001] The invention relates to the field of medical technology, in particular to a method and system for adjusting medical radio frequency output power. Background technique [0002] Radiofrequency medical equipment is radiofrequency ablation based on the biothermal effect of radiofrequency electromagnetic fields. It has been widely used in tumor treatment, cardiothoracic surgery, neurosurgery, gynecology and urology, etc., and has various corresponding medical equipment. During the operation, it is very important whether the output power of the radio frequency treatment system is suitable or not. If it is too low, the ultimate goal will not be achieved, and if it is too high, the target tissue will be vaporized and carbonized, which will also fail to achieve good results. [0003] Therefore, a technical problem that needs to be solved urgently by those skilled in the art is: how to effectively control the output power of the radio frequency, so as to solve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/20H03F3/189
CPCH03F3/20H03F3/189
Inventor 王钧
Owner 杭州象量医疗技术有限公司
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