Dual-Frequency Ultrasonic Signals for Cavitation Bubble Control

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Solution Overview

Problem

Existing high-intensity focused ultrasound (HIFU) treatments for lesions face challenges in maintaining treatment efficiency due to the need to stop and control cavitation bubbles, which reduces the effectiveness of frequency modulation.

Innovation Solution

An ultrasonic signal generation method using a first frequency to generate and expand cavitation bubbles, and a second frequency to simultaneously control or eliminate these bubbles, with a transmission ratio determination unit managing the frequencies to ensure efficient lesion treatment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If frequency modulation is used to control cavitation bubbles, then cavitation control is achieved, but treatment efficiency decreases due to the need to stop and control cavitation bubbles

Engineering Contradiction:

Improvecavitation bubble controlVSAvoidtreatment efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent combines two different frequency ultrasonic signals (first frequency for cavitation generation and second frequency for cavitation control) into a single transmission system. By merging these functions into one integrated approach, the system can simultaneously perform lesion treatment and cavitation bubble control without stopping, thereby maintaining treatment efficiency while achieving reliable cavitation control.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent dynamically adjusts the transmission ratios of the first and second frequency ultrasonic signals based on real-time cavitation bubble state monitoring. This dynamic adjustment allows the system to adaptively control cavitation bubbles during continuous treatment, resolving the contradiction between maintaining treatment efficiency and achieving reliable cavitation control.

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If a single frequency ultrasonic signal is used, then treatment simplicity is maintained, but cavitation bubble control capability is insufficient

Engineering Contradiction:

Improvetreatment simplicityVSAvoidcavitation bubble control capability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent segments the ultrasonic treatment into two distinct frequency components: a first frequency for generating and expanding cavitation bubbles, and a second frequency for controlling and eliminating cavitation bubbles. This segmentation allows each frequency to be optimized for its specific function, providing both treatment simplicity through clear functional separation and enhanced cavitation bubble control capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent creates a multi-functional ultrasonic treatment system where a single transmission system handles both lesion treatment and cavitation bubble control by incorporating multiple frequency signals. This universality allows the system to perform multiple functions simultaneously, maintaining operational simplicity while significantly improving cavitation bubble control capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If frequency modulation is applied to control cavitation, then cavitation state control is improved, but treatment time increases due to frequency modulation duration

Engineering Contradiction:

Improvecavitation state controlVSAvoidtreatment time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent maintains continuous useful action by transmitting both the first frequency (for cavitation generation) and second frequency (for cavitation control) ultrasonic signals simultaneously throughout the treatment process. This eliminates the need to stop treatment for frequency modulation, thereby reducing treatment time while maintaining reliable cavitation state control through continuous multi-frequency application.

Inventive Principle:

Principle #20Continuity of useful action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach enhances treatment efficiency by simultaneously treating lesions and managing cavitation bubbles, overcoming the inefficiencies associated with traditional frequency modulation.

Implementation Method 1

generating the first frequency ultrasonic signal toward a target area so that a cavitation bubble expands in the target area

Methodology Applied

Scientific EffectAcoustic cavitation: Acoustic Cavitation

Implementation Method 2

eliminating the cavitation bubble in the target area by applying a second frequency ultrasonic signal

Methodology Applied

Scientific EffectAcoustic cavitation: Acoustic Cavitation

Data Source

PatentUS20250276199A1Ultrasonic signal generation method for cavitation bubble control and ultrasonic treatment device using same

Publication Date: 2025.09.04 ALPINION MEDICAL SYST

AI summary

Provided is an ultrasonic signal generation method for cavitation bubble control, and the ultrasonic signal generation method for cavitation bubble control may include determining transmission ratios of a first frequency ultrasonic signal and a second frequency ultrasonic signal, generating the first frequency ultrasonic signal toward a target area so that a cavitation bubble expands in the target area based on the transmission ratios, and generating the second frequency ultrasonic signal toward the target area so that expansion of the cavitation bubble stops based on the transmission ratios.