Lens-coupled MeV x-radiography with transparent ceramic GLO scintillators

Cherepy, Nerine J.; Seeley, Zachary M.; Schneberk, D.J.; McNamee, Colby J.; Pincus, C. I.; Rudzik, Thomas J.; Osborne, Ross; Phillips, Ian; Nicolino, Joseph A.; Hall, James M.; Townsend, Andrew; Payne, Stephen A.

doi:10.1117/12.2595956

Cited by 4 publications

(5 citation statements)

References 6 publications

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“…The imaging system was configured with lead collimators. A 2.6 mm thick GLO transparent ceramic scintillator plate was used [11]. Scintillation light reflected on a turning mirror and detected through Nikon Nikkor lens coupled to a ZYLA 5.5 sCMOS camera (42 µm pixel pitch at focus).…”

Section: Imaging Facilitiesmentioning

confidence: 99%

“…The first phantom studied was named "OSU Phantom" as it was designed specifically to fit within the OSURR fast neutron beamline, which is a circular beam of 32.5 mm diameter [11]. This phantom, shown in Figure 1, is composed of three nested cylinders, each 2.2 cm tall.…”

Section: Imaging Facilitiesmentioning

confidence: 99%

“…MeV X-ray CT offers spatial resolution approximately 125 µm, with recent advancements in scintillator technology improving to 100-µm through a transparent ceramic (Gd,Lu,Eu)2O3 (GLO) scintillator. [5,11] The spatial resolution in fast neutron CT scanners is approximately 250 µm for lens-coupled systems with high light yield (Hi-LY) plastic scintillators [12]. A recent studying shows spatial resolution down to 176 µm [13].…”

Section: Introductionmentioning

confidence: 99%

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Experimental x-ray and fast neutron CT comparative analysis

Bisbee

Cherepy

2022

Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXIV

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X-ray computed tomography (CT) systems can produce high resolution images, in which small (sub-millimeter) features can be detected. This requires the X-rays to sufficiently penetrate the object and interact strongly enough to produce measurable attenuation. Low atomic number (low Z), low density objects shielded by high atomic number (high Z) materials result in X-ray reconstructions that lack sufficient contrast to differentiate interior features from noise and reconstruction artifacts. Fast neutron CT offers complementary information to X-rays with superior penetration through high Z shielding and with less severe beam hardening artifacts. However, spatial resolution in X-ray imaging systems is generally superior to that of fast neutron imagers. Here, we quantitatively compare these two complementary modalities to demonstrate the ability to observe small feature locations within two multi-material objects. Quantitative measures include calculation of image gradient at material edges, contrast-to-noise ratio, and F1 score.

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Section: Imaging Facilitiesmentioning

confidence: 99%

Section: Imaging Facilitiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental x-ray and fast neutron CT comparative analysis

Bisbee

Cherepy

2022

Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXIV

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“…Amorphous silicon arrays with structured scintillators such as patterned Gd2O2S:Tb phosphor screens and GdAlO3-αAl2O3 fiber arrays have been explored, with the goal of improving resolution and efficiency [7][8][9]. Lu2O3:Eu and (Gd,Lu)2O:Eu (GLO) have been demonstrated to improve efficiency for lens-coupled imaging due to their higher density, which results in higher stopping power for high-energy applications [10][11][12][13][14][15]. We report here on the fabrication of high aspect ratio pixelated scintillator arrays designed for highenergy x-ray field radiography using additive manufacturing technology.…”

Section: Introductionmentioning

confidence: 99%

Direct fabrication of pixelated detector arrays for high-energy x-ray imaging via additive manufacturing

Smith,

Osborne,

Yee

et al. 2023

Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXV

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Pixelated arrays of the transparent ceramic (Gd,Lu)2O3:Eu (GLO) scintillator for x-ray imaging have been fabricated using direct ink write (DIW) additive manufacturing followed by sintering and ceramics processing steps. These arrays consist of ~400 µm diameter pixels that are 4 mm long and have a pitch of 500 µm. When mounted on an amorphous silicon xray imaging array, pixelated GLO arrays offer >10x increase in the light output compared to black-coated monolithic GLO plates, using a 150 keV Bremsstrahlung source.

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“…Through fine engineering of optics, the spatial resolution of X-ray imaging in the lab has been pushed down to 26 μm recently . Although such an achievement is remarkable in the perovskite community, the resolution ability remained substantially low when compared with the micrometer resolution achieved in commercial computed tomography (CT) devices, where single-crystal or ceramic scintillator was used for imaging …”

Section: Introductionmentioning

confidence: 99%

Micrometer-Resolution X-ray Imaging Enabled by a Flexible Perovskite Screen

Sun

Wang

et al. 2022

ACS Appl. Mater. Interfaces

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Spatial resolution improvement has been keenly sought recently in the perovskite-based scintillation community. Here, micrometer resolution (∼2.0 μm) was achieved by using an X-ray imaging screen of self-assembled perovskite nanosheets. The assembly behavior of nanosheets was applicable to many substrates, including glass, metal, and polymer surfaces. The use of a polymer substrate not only eliminated the parasite absorption of X-ray but also enabled a flexible screen with robust bending stability. The assembly behavior, on the other hand, provided vicinity for an efficient energy transfer between nanosheets of varied thicknesses, as evidenced by both transient absorption and photoluminescence lifetime measurements. Importantly, the ensuing large Stokes shift (∼316 meV) significantly mitigated the reabsorption issue, leading to a comparable light yield to LYSO/Ce crystals. With the aid of the synchrotronbased collimated X-ray beam, the fine structure of two-dimensional objects, such as microchips, was clearly visualized with the flexible scintillation screen. Furthermore, those challenging biological samples were also scanned by phase-contrast imaging, whereby a three-dimensional reconstruction was obtained successfully. Despite the labile nature of the perovskite screen, this work represents the state-of-the-art spatial resolution for perovskite scintillation.

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Lens-coupled MeV x-radiography with transparent ceramic GLO scintillators

Cited by 4 publications

References 6 publications

Experimental x-ray and fast neutron CT comparative analysis

Experimental x-ray and fast neutron CT comparative analysis

Direct fabrication of pixelated detector arrays for high-energy x-ray imaging via additive manufacturing

Micrometer-Resolution X-ray Imaging Enabled by a Flexible Perovskite Screen

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