Figure 3
Panels (a–c) are the in situ analogue to the panels in Fig. 1(a–c) for a full head of a dead close-to-term rabbit kitten, though the region of the brain is not the same as Fig. 1. CTs were acquired at 24 keV with a propagation distance of 5 m. (a) A single propagation-based projection image of a whole rabbit kitten head suspended in agarose. (b) Phase contrast tomogram of the rabbit kitten head in (a,c) Phase retrieved tomogram of the head from (a) and (b) created using the single-material algorithm with respect to a bone/air interface. d) Phase retrieved tomogram using the single-material algorithm with respect to a tissue/air interface. (e) A close-up of the square region outlined in (d,f) Phase retrieved tomogram using the two-material algorithm (Equation (15)) with respect to the bone/tissue interface. (g and h) Profiles are plotted for each phase retrieval method for two regions on the left and right side of the images, marked ‘L’ and ‘R’, respectively. The profiles in (g) run across a section of the skull that has not yet fully calcified and highlights the accuracy of each method, showing the peaks blurring together with inaccurate phase retrieval.
