Unfolding Method with X-ray Path Length-Dependant Response Functions for Computed Tomography Using X-ray Energy Information

Imamura, Rikizo; Mikami, Kenta; Minami, Yuko; Kanno, Ikuo; Ohtaka, Masahiko; Hashimoto, Makoto; Ara, K.; Onabe, Hideaki

doi:10.1080/18811248.2010.9711672

Cited by 10 publications

(1 citation statement)

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“…Response functions were estimated using the method described by Imamura. 14) The phantom shown in Fig. 5(a) was used for estimating the response functions.…”

Section: Response Functionsmentioning

confidence: 99%

Using energy-resolved X-ray computed tomography with a current mode detector to distinguish materials

Kanno

Imamura

Yamashita

et al. 2014

Jpn. J. Appl. Phys.

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In conventional X-ray computed tomography (CT), X-rays are measured as electric current. Materials inside a subject are described by the linear attenuation coefficients averaged by the energy spectrum of the X-rays. A CT image cannot distinguish materials such as iodine and calcium, because the linear attenuation coefficient is not inherent to a material, but the product of X-ray mass attenuation coefficient and the density of the material. Materials such as iodine and calcium can be distinguished using an energy-resolved CT technique, with a current-mode detector system, using segment detectors aligned in the direction of X-ray incidence: the energy-resolved CT images are reconstructed by the X-rays with the energy of interest, by unfolding electric currents measured by the segment detectors.

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“…Response functions were estimated using the method described by Imamura. 14) The phantom shown in Fig. 5(a) was used for estimating the response functions.…”

Section: Response Functionsmentioning

confidence: 99%