High-energy phase-contrast X-ray imaging using a two-crystal X-ray interferometer

Yoneyama, Akio; Takeda, Takeshi; Tsuchiya, Y.; Wu, Jin; Lwin, Thet Thet; Hyodo, Kazuyuki; Hirai, Yasuharu

doi:10.1107/s0909049505008356

Cited by 24 publications

(16 citation statements)

References 13 publications

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“…The phase-contrast X-ray CT system consisted of an asymmetric Si(220) crystal forming a two-dimensional beam, a two-crystal X-ray interferometer (Yoneyama et al, 2004(Yoneyama et al, , 2005), a phase shifter and a lens-coupling X-ray chargedcoupled device (CCD) camera (Fig. 1).…”

Section: Phase-contrast X-ray Ct Systemmentioning

confidence: 99%

Enhanced renal image contrast by ethanol fixation in phase-contrast X-ray computed tomography

et al. 2014

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Phase-contrast X-ray imaging using a crystal X-ray interferometer can depict the fine structures of biological objects without the use of a contrast agent. To obtain higher image contrast, fixation techniques have been examined with 100% ethanol and the commonly used 10% formalin, since ethanol causes increased density differences against background due to its physical properties and greater dehydration of soft tissue. Histological comparison was also performed. A phase-contrast X-ray system was used, fitted with a two-crystal X-ray interferometer at 35 keV X-ray energy. Fine structures, including cortex, tubules in the medulla, and the vessels of ethanol-fixed kidney could be visualized more clearly than that of formalin-fixed tissues. In the optical microscopic images, shrinkage of soft tissue and decreased luminal space were observed in ethanol-fixed kidney; and this change was significantly shown in the cortex and outer stripe of the outer medulla. The ethanol fixation technique enhances image contrast by approximately 2.7-3.2 times in the cortex and the outer stripe of the outer medulla; the effect of shrinkage and the physical effect of ethanol cause an increment of approximately 78% and 22%, respectively. Thus, the ethanol-fixation technique enables the image contrast to be enhanced in phase-contrast X-ray imaging.

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Section: Phase-contrast X-ray Ct Systemmentioning

confidence: 99%

Enhanced renal image contrast by ethanol fixation in phase-contrast X-ray computed tomography

et al. 2014

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“…Phase-contrast X-ray imaging using a crystal X-ray interferometer (XI) (Bonse & Hart, 1965;Momose et al, 1996) has the highest sensitivity among phase-sensitive X-ray imaging methods (Yoneyama et al, 2008(Yoneyama et al, , 2015, and the density resolution of three-dimensional observation can reach 0.5 mg cm À3 (Yoneyama et al, 2013). We have studied many biological samples, for example soft tissues such as the kidney, brain and heart (Takeda et al, 2002;Yoneyama et al, 2005;Noda-Saita et al, 2006), embryos (Yamada et al, 2012), energy materials such as methane hydrates (Takeya et al, 2006), and industrial products such as lithium ion batteries (Takamatsu et al, 2018), achieved by taking advantage of the high sensitivity of XI. In addition, we developed X-ray thermography (Yoneyama et al, 2018) for detecting changes in temperature caused by thermal expansion, and we successfully performed time-resolved observation of thermal flow in heated water with a 1.3 s interval.…”

Section: Introductionmentioning

confidence: 99%

Feasibility study of interferometric phase-contrast X-ray imaging using the hard-X-ray free-electron laser of the SPring-8 Angstrom Compact Free-Electron Laser

Yoneyama¹,

Baba²,

Takamatsu³

et al. 2020

J Synchrotron Radiat

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Aiming for the fine observation of fast physical phenomena such as phonon propagation and laser ablation, phase-contrast X-ray imaging combined with a crystal X-ray interferometer and the X-ray free-electron laser (XFEL) of the SPring-8 Angstrom Compact Free-Electron Laser has been developed. An interference pattern with 70% visibility was obtained by single-shot exposure with a 15 keV monochromated XFEL. In addition, a phase map of an acrylic wedge was successfully obtained using the fringe scanning method.

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“…In this study we applied XII and DEI techniques for the nondestructive imaging of carbon-paper GDLs at room temperature. Recently, a phase-contrast X-ray imaging method using a two-crystal X-ray interferometer was developed (Yoneyama et al, 2005). A cryochamber that enables imaging from 193 K to room temperature was demonstrated in earlier experiments (Takeya et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Phase-contrast X-ray imaging of the gas diffusion layer of fuel cells

Takeya

Yoneyama

Miyamoto

et al. 2010

J Synchrotron Radiat

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The understanding of and in situ observation of the transport and distribution of water in carbon-paper gas diffusion layers (GDLs) using non-destructive imaging techniques is critical for achieving high performance in polymer electrolyte fuel cells (PEFCs). To investigate the behavior of water in GDLs of PEFCs, phase-contrast X-ray imaging via X-ray interferometric imaging (XII) and diffraction-enhanced imaging (DEI) were performed using 35 keV X-rays. The XII technique is useful for the radiographic imaging of GDLs and in situ observations of water evolution processes in operating PEFCs. DEI provides a way for tomographic imaging of GDLs in PEFCs. Because high-energy X-rays are applicable to the imaging of both carbon papers and heavy materials, which make up PEFCs, phase-contrast X-ray imaging techniques have proven to be valuable for investigation of GDLs.

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High-energy phase-contrast X-ray imaging using a two-crystal X-ray interferometer

Cited by 24 publications

References 13 publications

Enhanced renal image contrast by ethanol fixation in phase-contrast X-ray computed tomography

Enhanced renal image contrast by ethanol fixation in phase-contrast X-ray computed tomography

Feasibility study of interferometric phase-contrast X-ray imaging using the hard-X-ray free-electron laser of the SPring-8 Angstrom Compact Free-Electron Laser

Phase-contrast X-ray imaging of the gas diffusion layer of fuel cells

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