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- Title
Hard-X-ray dark-field imaging using a grating interferometer.
- Authors
Pfeiffer, F.; Bech, M.; Bunk, O.; Kraft, P.; Eikenberry, E. F.; Brönnimann, Ch.; Grünzweig, C.; David, C.
- Abstract
Imaging with visible light today uses numerous contrast mechanisms, including bright- and dark-field contrast, phase-contrast schemes and confocal and fluorescence-based methods. X-ray imaging, on the other hand, has only recently seen the development of an analogous variety of contrast modalities. Although X-ray phase-contrast imaging could successfully be implemented at a relatively early stage with several techniques, dark-field imaging, or more generally scattering-based imaging, with hard X-rays and good signal-to-noise ratio, in practice still remains a challenging task even at highly brilliant synchrotron sources. In this letter, we report a new approach on the basis of a grating interferometer that can efficiently yield dark-field scatter images of high quality, even with conventional X-ray tube sources. Because the image contrast is formed through the mechanism of small-angle scattering, it provides complementary and otherwise inaccessible structural information about the specimen at the micrometre and submicrometre length scale. Our approach is fully compatible with conventional transmission radiography and a recently developed hard-X-ray phase-contrast imaging scheme. Applications to X-ray medical imaging, industrial non-destructive testing and security screening are discussed.
- Subjects
INTERFEROMETERS; DIAGNOSTIC imaging; MEDICAL imaging systems; PHASE-contrast microscopy; SIGNAL-to-noise ratio; X-rays
- Publication
Nature Materials, 2008, Vol 7, Issue 2, p134
- ISSN
1476-1122
- Publication type
Article
- DOI
10.1038/nmat2096