title: Comparison of two x-ray phase-contrast imaging methods with a microfocus source.
abstract: 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.
authors: T
authors: T
authors: Zhou
authors: U
authors: U
authors: Lundström
authors: T
authors: T
authors: Thüring
authors: S
authors: S
authors: Rutishauser
authors: D H
authors: DH
authors: Larsson
authors: M
authors: M
authors: Stampanoni
authors: C
authors: C
authors: David
authors: H M
authors: HM
authors: Hertz
authors: A
authors: A
authors: Burvall
mesh_terms: D000465:Algorithms; D011856:Radiographic Image Enhancement / Q000379:methods*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D014961:X-Ray Diffraction / Q000379:methods*