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Figure 4
SR images of CO2 microbubbles with two SDDs of 1 cm (a) and 30 cm (c). Panels (b) and (d) show magnified images of the region in the black boxes in (a) and (c), respectively. The CO2 microbubbles could be clearly visualized on the phase contrast image (d), but not on the absorption contrast image (b). The images were obtained at an energy of 19 keV. The pixel size was 3.25 µm × 3.25 µm. The exposure time was 1 s.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 24| Part 6| November 2017| Pages 1260-1264
https://doi.org/10.1107/S1600577517014072
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