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Figure 2
(a) Detailed views of two artificial lung nodules acquired at an entrance dose of ∼13 mGy air kerma and reconstructed without phase retrieval (RAW), with phase retrieval (PHR) and with a subset of a third of the angular projections. PHR demonstrates the best image quality, showing minute air enclosures within the nodule and fine spiculations protruding into the surrounding alveoli. (b) Profile plots at the line indicated in yellow (normalized to a maximum of 1). Without phase retrieval no density difference between the nodules can be detected (RAW). Phase retrieval (PHR) allowed for differentiation of nodule densities. Note that a reduction in used projections (PHR 1/3) did not impair the sensitivity in density differentiation. [Images are displayed with auto-scaled grey values (minimum = black, maximum = white) explaining the differences in the appearance of the data.]

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 25| Part 6| November 2018| Pages 1827-1832
https://doi.org/10.1107/S1600577518013401
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