Figure 5
From: Propagation-based Phase-Contrast X-ray Imaging at a Compact Light Source
The contrast in all three regions of interest is increased by increasing the detector-sample distance to the edge-enhancement regime. (A) and (B) shows the nasal airways imaged with a detector pixel size of 0.65 μm and exposure time of 180 s. In (B) the sample-detector distance is increased to 30 cm. In panels (C) and (D) the trachea region with a detector pixel size of 6.5 μm and exposure time of 1 s is shown. The sample-detector distance is 1.5 m in (D). The blue arrows highlight the edges of the trachea. The lungs are displayed in (E) and (F) with a detector pixel size of 13 μm and exposure time of 1 s. The sample-detector distance is increased to 1.6 m in (F) and is less than 2 cm for (A), (C) and (E).
