Figure 7. Phase contrast images of an adult male rabbit imaged at 33 keV. (a) Propagation-based imaging (PBI) with l₂=4.26 m. Image size: 63.31 mm x 77.42 mm. Black region of interest (ROI): 400 x 400 pixels. White ROI: 250 x 250 pixels. Exposure time: 5.0 s. Surface entrance dose: 9.8±0.3 mGy. (b) Analyser-based imaging (ABI) of the same rabbit. Image size: 57.74 mm x 60.86 mm. Black ROI: 400 x 400 pixels. White ROI: 250 x 250 pixels. Exposure time: 3.0 s. Surface entrance dose: 6.2±0.3 mGy.