Figure 7
From: Electrical impedance imaging system using FPGAs for flexibility and interoperability
Multi-frequency imaging of phantom. (a) Configuration of six objects in the saline phantom and their conductivity spectra. (b) Time-difference images simultaneously acquired at six different frequencies of 0.1, 1, 5, 10, 50, and 100 kHz. (c) Frequency-difference images between five different frequencies of 1, 5, 10, 50, 100 kHz and 100 Hz are displayed. Here, we used the image at 100 Hz as the reference for all pairs.