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Analysis and assessment of errors in a parallel data acquisition system for electrical impedance tomography
1Division de Instrumentacion y Bioingerieria ETSI Telecomunicacion, Barcelona, Spain.
Summary
This study compares electrical impedance tomography (EIT) data collection methods, finding parallel systems offer better speed or signal-to-noise ratio but may increase common-mode errors.
Area of Science:
- Biomedical Engineering
- Electrical Engineering
- Medical Imaging
Background:
- Electrical Impedance Tomography (EIT) is a non-invasive imaging technique.
- Accurate data collection is crucial for effective EIT reconstruction.
- Various configurations exist for acquiring EIT data.
Purpose of the Study:
- To evaluate three distinct data collection configurations for EIT.
- To analyze the impact of measurement errors on different configurations.
- To determine the optimal configuration for EIT applications.
Main Methods:
- Consideration of serial current/parallel voltage and full parallel measurement setups.
- Analysis of measurement errors including stray capacitances, common mode signals, and contact impedance.
- Comparative evaluation of system speed and signal-to-noise ratio.
Main Results:
- Parallel systems demonstrate potential for enhanced speed or signal-to-noise ratio (SNR).
- Serial current/parallel voltage configurations were also analyzed.
- Parallel systems may introduce larger common-mode errors.
Conclusions:
- Parallel EIT configurations offer significant advantages in speed and SNR.
- Careful consideration of common-mode error mitigation is necessary for parallel systems.
- The choice of configuration depends on specific application requirements and error tolerance.