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Quantitative Mass Density Image Reconstructed from the Complex X-Ray Refractive Index.

Mukaide T, Iida A, Watanabe M, Takada K, Noma T - PLoS ONE (2015)

Bottom Line: The mass density was obtained from the experimentally observed ratio of the imaginary and real parts of the complex X-ray refractive index.An empirical linear relationship between the X-ray mass attenuation coefficient of the materials and X-ray energy was found for X-ray energies between 8 keV and 30 keV.The reconstructed mass density agrees well with the calculated one.

View Article: PubMed Central - PubMed

Affiliation: Nanomaterials R&D Center, Canon Inc., Ohta-ku, Tokyo, Japan.

ABSTRACT
We demonstrate a new analytical X-ray computed tomography technique for visualizing and quantifying the mass density of materials comprised of low atomic number elements with unknown atomic ratios. The mass density was obtained from the experimentally observed ratio of the imaginary and real parts of the complex X-ray refractive index. An empirical linear relationship between the X-ray mass attenuation coefficient of the materials and X-ray energy was found for X-ray energies between 8 keV and 30 keV. The mass density image of two polymer fibers was quantified using the proposed technique using a scanning-type X-ray microbeam computed tomography system equipped with a wedge absorber. The reconstructed mass density agrees well with the calculated one.

No MeSH data available.


Schematic of the X-ray computed tomography system.The system comprises a KB mirror, a sample stage, two ionization chambers, a wedge absorber, and a photodiode detector. The distance from the sample to the wedge absorber is 1.5 m.
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pone.0131401.g003: Schematic of the X-ray computed tomography system.The system comprises a KB mirror, a sample stage, two ionization chambers, a wedge absorber, and a photodiode detector. The distance from the sample to the wedge absorber is 1.5 m.

Mentions: Experiments were performed using the beam line BL-4A at the Photon Factory, High Energy Accelerator Research Organization(KEK). To measure the complex X-ray refractive index for the materials studied, a scanning-type X-ray computed tomography system was developed using an X-ray microbeam and a wedge absorber. A schematic of the X-ray computed tomography system is shown in Fig 3.


Quantitative Mass Density Image Reconstructed from the Complex X-Ray Refractive Index.

Mukaide T, Iida A, Watanabe M, Takada K, Noma T - PLoS ONE (2015)

Schematic of the X-ray computed tomography system.The system comprises a KB mirror, a sample stage, two ionization chambers, a wedge absorber, and a photodiode detector. The distance from the sample to the wedge absorber is 1.5 m.
© Copyright Policy
Related In: Results  -  Collection

License
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getmorefigures.php?uid=PMC4482658&req=5

pone.0131401.g003: Schematic of the X-ray computed tomography system.The system comprises a KB mirror, a sample stage, two ionization chambers, a wedge absorber, and a photodiode detector. The distance from the sample to the wedge absorber is 1.5 m.
Mentions: Experiments were performed using the beam line BL-4A at the Photon Factory, High Energy Accelerator Research Organization(KEK). To measure the complex X-ray refractive index for the materials studied, a scanning-type X-ray computed tomography system was developed using an X-ray microbeam and a wedge absorber. A schematic of the X-ray computed tomography system is shown in Fig 3.

Bottom Line: The mass density was obtained from the experimentally observed ratio of the imaginary and real parts of the complex X-ray refractive index.An empirical linear relationship between the X-ray mass attenuation coefficient of the materials and X-ray energy was found for X-ray energies between 8 keV and 30 keV.The reconstructed mass density agrees well with the calculated one.

View Article: PubMed Central - PubMed

Affiliation: Nanomaterials R&D Center, Canon Inc., Ohta-ku, Tokyo, Japan.

ABSTRACT
We demonstrate a new analytical X-ray computed tomography technique for visualizing and quantifying the mass density of materials comprised of low atomic number elements with unknown atomic ratios. The mass density was obtained from the experimentally observed ratio of the imaginary and real parts of the complex X-ray refractive index. An empirical linear relationship between the X-ray mass attenuation coefficient of the materials and X-ray energy was found for X-ray energies between 8 keV and 30 keV. The mass density image of two polymer fibers was quantified using the proposed technique using a scanning-type X-ray microbeam computed tomography system equipped with a wedge absorber. The reconstructed mass density agrees well with the calculated one.

No MeSH data available.