Ultrasound Echo Signal Equalization for Probe Element Degradation
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Solution Overview
Problem
The degradation of elements in an ultrasonic probe leads to a decrease in the quality of ultrasonic images, as the sensitivity and frequency characteristics of the probe's transducer elements change over time, affecting the performance of the ultrasonic diagnostic apparatus.
Innovation Solution
An ultrasonic diagnostic apparatus that includes a processor to modulate and amplify echo signals based on comparing frequency characteristic data with pre-stored normal data, using frequency filters to equalize amplitude differences and maintain frequency characteristics, thereby compensating for element degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If transmission signal intensity is increased to compensate for element degradation, then signal strength is improved, but frequency characteristics are distorted and image quality deteriorates
Solution Approach 1:
Instead of amplifying the transmission signal to compensate for element degradation, the patent inverts the approach by applying compensation to the reception signal. The processor applies frequency filters and amplification to the received echo signal based on stored compensation data, thereby restoring frequency characteristics without distorting the transmission signal.
Solution Approach 2:
The patent changes the parameters of the reception signal through frequency filtering and amplification. The processor modifies the frequency characteristics and amplitude of the echo signal by applying filters selected from a look-up table, thereby restoring degraded frequency characteristics while maintaining signal integrity.
2Manufacturing precision
If compensation filtering is applied to maintain frequency characteristics, then frequency response is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by storing compensation data (frequency filter characteristics) in advance in a look-up table within the processor. When element degradation is detected, the appropriate compensation filter is quickly selected and applied to the reception signal, avoiding the need for complex real-time calculation and reducing processing complexity.
Solution Approach 2:
The patent uses copying by storing pre-calculated compensation data and filter characteristics in a look-up table. Instead of performing complex real-time frequency analysis and filter design, the system copies and applies pre-stored compensation parameters that match the detected degradation level, significantly simplifying the processing complexity.
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
The apparatus effectively maintains the quality of ultrasonic images by adjusting echo signals to match pre-degradation frequency characteristics, preventing further degradation of the probe elements and ensuring consistent image quality.
Implementation Method 1
a probe including a plurality of elements provided to transmit an ultrasonic signal to an object and receive an echo signal reflected from the object
Implementation Method 2
modulating the echo signal based on comparing frequency characteristic data of the echo signal with pre-stored normal frequency characteristic data
Data Source
AI summary
An ultrasonic diagnostic apparatus includes a probe including a plurality of elements provided to transmit an ultrasonic signal to an object and receive an echo signal reflected from the object, and a processor modifying the echo signal based on comparing frequency characteristic data of the echo signal with pre-stored normal frequency characteristic data and amplifying the modified echo signal.