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Phase imaging using a polychromatic x-ray laboratory source
B D Arhatari1, K Hannah, E Balaur
1Department of Physics, LaTrobe University, Victoria 3086, Australia. b.arhatari@latrobe.edu.au
Optics Express
|November 26, 2008
Summary
This study presents a quantitative phase imaging method using broad bandwidth X-rays. It accurately retrieves object thickness by analyzing spectral attenuation and refractive index, even with absorption edges.
Area of Science:
- X-ray imaging
- Phase contrast imaging
- Quantitative phase retrieval
Background:
- Quantitative phase imaging (QPI) is crucial for material characterization.
- Traditional X-ray methods often struggle with precise thickness determination of homogeneous objects.
Purpose of the Study:
- To develop and demonstrate a quantitative phase imaging method for homogeneous objects using a laboratory X-ray source.
- To enable accurate thickness retrieval by decoupling spectral attenuation and refractive index effects.
Main Methods:
- Utilized an X-ray laboratory-based source with a broad bandwidth spectrum.
- Employed spectrally weighted values for attenuation coefficient and refractive index decrement.
- Applied the method to homogeneous objects, including those with absorption edges.
- Integrated the technique into tomographic measurements.
Main Results:
- Successfully retrieved the thickness of homogeneous objects.
- Demonstrated the method's validity across a wide energy range and for objects with absorption edges.
- Showcased the applicability in quantitative phase retrieval imaging during tomographic measurements.
Conclusions:
- The developed quantitative phase imaging method is effective for homogeneous objects.
- The accessibility of laboratory X-ray sources makes this technique practical.
- This approach advances quantitative phase retrieval in X-ray imaging applications.
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