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Figure 8
Head of a mosquito, imaged at the ANKA TopoTomo bending-magnet beamline with filtered white-beam radiation. Top left: one of the transmission radiographs recorded in the tomography scan, shown after flat-field normalization. The image is dominated by phase contrast. Edges and interfaces in the object are clearly visible. Bottom left: a slice obtained through direct tomographic reconstruction of the flat-field-corrected transmission radiographs (i.e. without phase retrieval) exhibits strong edge contrast, just as the transmission radiograph does. However, the gray values inside the object are so similar to those outside that segmentation is not easily possible. Top right: phase map retrieved from the flat-field-corrected transmission radiograph. The gray values correspond to a map of the projected thickness of the object; lighter tone means greater thickness. Bottom right: tomographic slice obtained from the retrieved phase maps using standard tomographic reconstruction software. A volume rendering based on phase-retrieved tomographic image data is shown in Fig. 9[link].

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 18| Part 4| July 2011| Pages 617-629
https://doi.org/10.1107/S0909049511002895
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