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Copyright (c) 2023 Proceedings on Automation in Medical Engineering
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The separation of respiration and cardiac activity in electrical impedance tomography is commonly carried out after image reconstruction. We investigated whether the harmonic analysis approach is capable of separating respiration and cardiac activity based on raw voltage data. In other words, we separated the two signal components before image reconstruction and thus made the separation process independent of it. The harmonic analysis approach separated respiration and cardiac activity well when applied on the raw voltage data created from a simulation model. The mean absolute error and residuals were < 2.5e-3 and < 2e-2, respectively.