Ultrasonic Diagnostic Apparatus Coded Pulse Shear Wave Temperature Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ultrasonic diagnostic methods using acoustic radiation pressure require high energy application, leading to increased temperature at the ultrasound-exposed portion, which is undesirable.
Innovation Solution
An ultrasonic diagnostic apparatus employing a coded pressurization pulse signal and a measurement pulse signal to generate and measure shear waves, using unipolar codes and a displacement estimator to calculate the elastic modulus without causing temperature increases, by optimizing the timing and amplitude of ultrasonic wave emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a strong ultrasonic burst wave is emitted to generate a shear wave using acoustic radiation pressure, then the shear wave generation effectiveness is improved, but the temperature of the ultrasound-exposed portion increases
Solution Approach 1:
The patent applies periodic pulsed ultrasonic waves instead of continuous strong ultrasonic waves. The push pulse is applied periodically with specific duty cycles, allowing tissue to cool between pulses while still generating sufficient shear waves for elasticity measurement, thus resolving the contradiction between power effectiveness and temperature control
Solution Approach 2:
The patent changes the temporal parameters of ultrasonic application by using coded pulse sequences with varying duty cycles and intervals. By optimizing the pulse width, repetition frequency, and overall duty cycle, the system achieves effective shear wave generation while keeping the average power low enough to prevent excessive temperature rise
2Speed
If a strong ultrasonic wave is emitted for a short period to generate shear wave, then the shear wave generation speed is improved, but the energy concentration increases causing temperature rise
Solution Approach 1:
The patent uses periodic pulsed ultrasonic waves with optimized duty cycles to generate shear waves at appropriate speeds while distributing energy over time. The periodic application allows energy to be delivered efficiently without concentrating it all at once, preventing excessive temperature rise while maintaining adequate shear wave generation speed
Solution Approach 2:
The patent dynamically adjusts the ultrasonic pulse parameters including duty cycle, pulse width, and interval timing to optimize the balance between shear wave generation speed and energy concentration. This dynamic parameter adjustment allows the system to adapt to different tissue types and measurement requirements while controlling temperature
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
Enables ultrasonic diagnosis using acoustic radiation pressure without elevating the temperature of the ultrasound-exposed area, improving diagnostic precision and reducing energy application time.
Implementation Method 1
a probe that outputs an ultrasonic wave for generating a shear wave in a target object on the basis of the pressurization pulse
Implementation Method 2
a receiver that receives an echo of the ultrasonic wave for measurement, and outputs an electric signal
Data Source
AI summary
To provide an ultrasonic diagnostic apparatus and an ultrasonic diagnostic method capable of conducting ultrasonic diagnosis using acoustic radiation pressure, without causing an increase in the temperature of an ultrasound-exposed portion.A push pulse transmitter outputs a coded pressurization pulse signal. A track pulse transmitter outputs a measurement pulse signal for measurement. An ultrasound probe outputs an ultrasonic wave for generating a shear wave in a target object on the basis of the pressurization pulse signal, and an ultrasonic wave for measurement on the basis of the measurement pulse signal. An echo receiver receives an echo of the ultrasonic wave for measurement, and outputs an electric signal. An elastic modulus estimator decodes the electric signal output by the echo receiver, and estimates an elastic modulus of the target object on the basis of the decoded signal.