Optimizing the Measurement Frequency in Electrical Impedance Tomography
نویسندگان
چکیده
In electrical impedance tomography (EIT), a small alternating current is injected into the patient and the resulting voltages are measured at the body surface. From this, images are reconstructed that can be used for ventilation and cardiac monitoring. In modern EIT systems and in prototypes, the frequency of the injected current can be varied in a range between typically 50 kHz and 250 kHz. In this paper, we investigate the effect of the current injection frequency on EIT measurements. 76 logarithmically distributed frequencies between 1 kHz and 1 MHz are simulated. The influence is investigated on both the raw data and the images.
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