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. 2018 Nov 10;18(11):3873. doi: 10.3390/s18113873

Figure 1.

Figure 1

Model simulation results: (a) echo matrix in a breathing case; (b) result matrix after the background removal in a breathing case; (c) result matrix after the inverse fast Fourier transform (IFFT) on range in a breathing case; and, (d) result matrix after the IFFT on range in a non-breathing case.