Biomagnetic Field Measurement Processing Apparatus Correcting Tissue Distortion
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Solution Overview
Problem
The existing biomagnetic field measurement processing apparatuses face challenges in accurately generating current waveforms for evaluating neural or muscle functions due to distortion caused by surrounding tissues, leading to underestimation or overestimation of neural functions.
Innovation Solution
The apparatus reconfigures current signals from biomagnetic field data, extracts specific current components, and combines multiple inward current waveforms to generate a corrected current waveform for display, allowing for proper evaluation of neural or muscle functions by positioning virtual electrodes along nerve or muscle pathways and calculating current intensities using linear interpolation or recursive null steering filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current waveforms are generated using conventional spatial filter methods, then the measurement process is straightforward, but the current waveforms are distorted by surrounding tissues leading to inaccurate neural function evaluation
Solution Approach 1:
The patent segments the current waveform generation process into multiple components: extracting inward current waveforms from multiple directions, separating them by direction, and selectively combining only those from opposite directions. This segmentation allows elimination of distorted components while preserving accurate ones.
Solution Approach 2:
The patent extracts specific inward current waveform components from the total current signal by direction. By isolating and extracting only the inward current components from opposite directions, it removes the harmful distorted components from surrounding tissues while retaining the useful neural activity signals.
2Measurement precision
If multiple current waveforms are combined to improve accuracy, then measurement precision increases, but the processing complexity increases
Solution Approach 1:
The patent applies local quality by treating current waveforms from different directions differently. Instead of uniformly processing all waveforms, it selectively combines only those from opposite directions (e.g., left and right, anterior and posterior), applying different processing rules to different spatial locations to achieve accurate cancellation of distorted components.
Solution Approach 2:
The patent uses asymmetric processing where inward current waveforms from opposite directions are combined with different signs (one positive, one negative). This asymmetric combination strategy exploits the directional properties of neural currents to cancel out distorted components while preserving the true neural activity signal.
Data Source
AI summary
A biomagnetic field measurement processing apparatus includes circuitry; and a memory storing computer-executable instructions that cause the circuitry to execute reconfiguring a current signal from a biomagnetic field signal; extracting a current component from the current signal; and based on the extracted current component, adding to each other at least two current waveforms among current waveforms of a plurality of inward currents that are current components directed toward a nerve axon from around the nerve axon, or adding to each other at least two current waveforms among current waveforms of a plurality of inward currents that are current components directed toward a muscle fiber from around the muscle fiber, and generating a current waveform to be displayed on a display device, according to the at least two current waveforms added to each other.