Enhanced quantitative X-ray phase-contrast images using Foucault differential filters

Jaeho Choi; Young-Sung Park

doi:doi:10.3788/COL201715.081103

Chinese Optics Letters, 2017, 15 (8): 081103, Published Online: Jul. 20, 2018

Enhanced quantitative X-ray phase-contrast images using Foucault differential filters Download： 778次

Jaeho Choi ^1,*Young-Sung Park ^1,2

Author Affiliations

¹ Department of Physics, Dankook University, Cheonan 31116, Korea

² Division of RI Convergence Research, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Korea

Figures & Tables

Fig. 1. (Color online) Schematic diagram of the FDF method. S, X-ray tube source; A, lead aperture; SC, scintillation crystal; IO, visible light imaging optics; SP, specimen; $f$ , focal length of PA; $g$ , distance between the end of the specimen surface and the FKAF; blue arrow, translation direction of SP. $k 1$ , $k 2$ , $k 3$ , knife edges; $z$ axis, optical axis.

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Fig. 2. Schematic of an example for the scan process to acquire FDF data in the $x y$ plane by a knife-edge element $k 2$ .

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Fig. 3. Illustration of the concept of imaging the different surfaces using the FKA with optical axis translation of the specimen, $s 1 - s 4$ , surfaces in the specimen; $t 1 - t 4$ , transmitted X-rays; $r 1 - r 4$ , refracted X-rays.

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Fig. 4. Sequential QXPC images, where $z$ represents the specimen position along the optical axis. The initial distance ( $z = 0$ ) from the end surface of the specimen to the FKAF ( $g$ in Fig. 1) was $\sim 1 mm$ .

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Fig. 5. (Color online) (a) Surface rendering image is depicted, using the stacked images of the QXPC. (b) ROI of a region of the upper Pc. Cross-sectional cut lines (red dots) rotated to $x = 76 °$ , $y = 45 °$ , and $z = 10 °$ from their original axes. (c) Cross-sectional images along the cut lines. The arrow-heads at the cut lines on (c) represent the corresponding spots on the sliced planes on (c). The color bar expresses the relative intensity relevant to the density of the medium. Reddish and blue colors imply high- and low-density mediums, respectively.

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Jaeho Choi, Young-Sung Park. Enhanced quantitative X-ray phase-contrast images using Foucault differential filters[J]. Chinese Optics Letters, 2017, 15(8): 081103.

Enhanced quantitative X-ray phase-contrast images using Foucault differential filters Download： 778次

Fig. 2. Schematic of an example for the scan process to acquire FDF data in the $x y$ plane by a knife-edge element $k 2$ .

Fig. 3. Illustration of the concept of imaging the different surfaces using the FKA with optical axis translation of the specimen, $s 1 - s 4$ , surfaces in the specimen; $t 1 - t 4$ , transmitted X-rays; $r 1 - r 4$ , refracted X-rays.

Fig. 4. Sequential QXPC images, where $z$ represents the specimen position along the optical axis. The initial distance ( $z = 0$ ) from the end surface of the specimen to the FKAF ( $g$ in Fig. 1) was $\sim 1 mm$ .

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Enhanced quantitative X-ray phase-contrast images using Foucault differential filters Download： 778次

Fig. 2. Schematic of an example for the scan process to acquire FDF data in the xy plane by a knife-edge element k2.

Fig. 3. Illustration of the concept of imaging the different surfaces using the FKA with optical axis translation of the specimen, s1–s4, surfaces in the specimen; t1–t4, transmitted X-rays; r1–r4, refracted X-rays.

Fig. 4. Sequential QXPC images, where z represents the specimen position along the optical axis. The initial distance (z= 0) from the end surface of the specimen to the FKAF (g in Fig. 1) was ∼1 mm.

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Fig. 2. Schematic of an example for the scan process to acquire FDF data in the $x y$ plane by a knife-edge element $k 2$ .

Fig. 3. Illustration of the concept of imaging the different surfaces using the FKA with optical axis translation of the specimen, $s 1 - s 4$ , surfaces in the specimen; $t 1 - t 4$ , transmitted X-rays; $r 1 - r 4$ , refracted X-rays.

Fig. 4. Sequential QXPC images, where $z$ represents the specimen position along the optical axis. The initial distance ( $z = 0$ ) from the end surface of the specimen to the FKAF ( $g$ in Fig. 1) was $\sim 1 mm$ .