Quantitative phase imaging with polychromatic x-ray sources

Luu, Mac B.; Arhatari, Benedicta D.; Tran, Chanh Q.; Balaur, Eugeniu; Pham, Bao T.; Vo, Nghia T.; Chen, Bin; Putkunz, Corey T.; Kirby, Nigel; Mudie, Stephen; Peele, Andrew G.

doi:10.1364/oe.19.008127

Cited by 8 publications

(14 citation statements)

References 12 publications

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“…Our result was compared to polychromatic TIE [11] and CTF [12] reconstructions (figure 6). The TIE reconstruction employed an energy, β and δ of 19.137 keV,´-6.34 10 7 , -6.44 10 6 respectively.…”

Section: Discussionmentioning

confidence: 99%

“…Our method of reconstruction was compared to polychromatic versions of the transport of intensity equation (TIE) [11] and contrast transfer function (CTF) [12]. The TIE reconstruction used values of an energy, β and δ of 19.137 keV,´-6.34 10 7 and´-6.44 10 6 respectively.…”

Section: Algorithmmentioning

confidence: 99%

“…The analytical nature of the polychromatic TIE algortithm [11] means this method will always allow faster reconstructions than the polychromatic CTF method [12] and Table 1. Polychromatic iterative, TIE and CTF using the sample plane c 2 metric for the reconstructions presented in figure 2.…”

Section: Algorithmmentioning

confidence: 99%

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An iterative method for near-field Fresnel region polychromatic phase contrast imaging

Carroll

Riessen

Balaur

et al. 2017

J. Opt.

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We present an iterative method for polychromatic phase contrast imaging that is suitable for broadband illumination and which allows for the quantitative determination of the thickness of an object given the refractive index of the sample material. Experimental and simulation results suggest the iterative method provides comparable image quality and quantitative object thickness determination when compared to the analytical polychromatic transport of intensity and contrast transfer function methods. The ability of the iterative method to work over a wider range of experimental conditions means the iterative method is a suitable candidate for use with polychromatic illumination and may deliver more utility for laboratory-based x-ray sources, which typically have a broad spectrum.

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Section: Discussionmentioning

confidence: 99%

Section: Algorithmmentioning

confidence: 99%

See 1 more Smart Citation

An iterative method for near-field Fresnel region polychromatic phase contrast imaging

Carroll

Riessen

Balaur

et al. 2017

J. Opt.

Self Cite

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show abstract

“…The response of the sample now depends on the frequency, except in the trivial case of a binary object in which transmission is wholly through vacuum, for which n ω = 1 for all ω. The direct determination of thickness distributions has also been discussed in the context of a formulation based on the contrast transfer function [22,19]. The derivation of this approach depends critically on the assumption that only terms linear in T ( ) need be retained in a series expansion of the exponential function in Eq.…”

Section: Methodsmentioning

confidence: 99%

“…There has been some recent experimental activity in the use of X-rays to determine the thickness and nanoroughness of thin foils [19], so we have applied this new form of broadband ptychography to this problem. We consider the formulation of this procedure in the context of optical coherence theory and outline the iterative procedure that is used to determine thickness distributions of thin foils from independent sets of diffraction data obtained by scanning a sample.…”

Section: Introductionmentioning

confidence: 99%

Broadband x-ray ptychography

Pradier

Riessen

Cadenazzi

et al. 2016

AIP Conference Proceedings

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Abstract. The Born modal expansion of the cross-spectral density is used to construct a ptychographic imaging scheme appropriate for X-ray imaging using broadband partially coherent sources. The formulation of the scheme is demonstrated through a comparison with earlier work using detailed simulations. The advantages of the broadband ptychographic imaging approach are discussed in the context of the determination of the nanoroughness and thickness profile of thin films.

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X-ray phase-contrast imaging: from pre-clinical applications towards clinics

2012

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Phase-contrast x-ray imaging (PCI) is an innovative method that is sensitive to the refraction of the x-rays in matter. PCI is particularly adapted to visualize weakly absorbing details like those often encountered in biology and medicine. In past years, PCI has become one of the most used imaging methods in laboratory and preclinical studies: its unique characteristics allow high contrast 3D visualization of thick and complex samples even at high spatial resolution. Applications have covered a wide range of pathologies and organs, and are more and more often performed in vivo. Several techniques are now available to exploit and visualize the phase-contrast: propagation- and analyzer-based, crystal and grating interferometry and non-interferometric methods like the coded aperture. In this review, covering the last five years, we will give an overview of the main theoretical and experimental developments and of the important steps performed towards the clinical implementation of PCI.

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Quantitative phase imaging with polychromatic x-ray sources

Cited by 8 publications

References 12 publications

An iterative method for near-field Fresnel region polychromatic phase contrast imaging

An iterative method for near-field Fresnel region polychromatic phase contrast imaging

Broadband x-ray ptychography

X-ray phase-contrast imaging: from pre-clinical applications towards clinics

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