Figure 6. Terahertz in-line holograms of mouse healthy liver tissue and their reconstructions.

(a), normalised hologram from the first 100 frames of 1,000 frames in total. (b–c), object absorption and phase-shift distributions reconstructed from Fig. 6(a). (d), normalised hologram from the last 100 frames of the 1,000 frames. (e–f), absorption and phase-shift distributions reconstructed from Fig. 6(d). The rings in the reconstructions are due to the applied round cosine-like apodisation filter, which sets the intensity values at the holograms' edges to zero, as seen in (a)and (d), to avoid reflection of the signal at the edges of the holograms during Fourier transforms.