Comparison of two x-ray phase-contrast imaging methods with a microfocus source.
Opt Express
; 21(25): 30183-95, 2013 Dec 16.
Article
en En
| MEDLINE
| ID: mdl-24514597
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.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Difracción de Rayos X
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Algoritmos
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Interpretación de Imagen Radiográfica Asistida por Computador
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Intensificación de Imagen Radiográfica
Idioma:
En
Revista:
Opt Express
Asunto de la revista:
OFTALMOLOGIA
Año:
2013
Tipo del documento:
Article