期刊
OPTICS EXPRESS
卷 21, 期 25, 页码 30183-30195出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.21.030183
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资金
- Swedish Research Council
- Wallenberg Foundation
- Goran Gustafsson foundation
We present a comparison for high-resolution imaging with a laboratory source between grating-based (GBI) and propagation-based (PBI) x-ray phase-contrast imaging. The comparison is done through simulations and experiments using a liquid-metal-jet x-ray microfocus source. Radiation doses required for detection in projection images are simulated as a function of the diameter of a cylindrical sample. Using monochromatic radiation, simulations show a lower dose requirement for PBI for small object features and a lower dose for GBI for larger object features. Using polychromatic radiation, such as that from a laboratory microfocus source, experiments and simulations show a lower dose requirement for PBI for a large range of feature sizes. Tested on a biological sample, GBI shows higher noise levels than PBI, but its advantage of quantitative refractive index reconstruction for multi-material samples becomes apparent. (C) 2013 Optical Society of America
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