Development and x-ray imaging performance of Tb-doped GdAlO3-αAl2O3 submicron-diameter phase-separated scintillator fibers
Scintillators are key components in high-energy x-ray detectors for x-ray computed tomography, which are applied in medical diagnosis, nondestructive testing, and security inspection. Scintillators in x-ray imaging are required to have both high spatial resolution and sensitivity; however, a trade-o...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2023-02-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0136069 |
| _version_ | 1811154822279200768 |
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| author | M. Yoshino K. Kamada S. Yamamoto R. Yajima R. Sasaki M. Sagisaka J. Kataoka T. Horiai Y. Yokota A. Yoshikawa |
| author_facet | M. Yoshino K. Kamada S. Yamamoto R. Yajima R. Sasaki M. Sagisaka J. Kataoka T. Horiai Y. Yokota A. Yoshikawa |
| author_sort | M. Yoshino |
| collection | DOAJ |
| description | Scintillators are key components in high-energy x-ray detectors for x-ray computed tomography, which are applied in medical diagnosis, nondestructive testing, and security inspection. Scintillators in x-ray imaging are required to have both high spatial resolution and sensitivity; however, a trade-off between spatial resolution and sensitivity exists. To improve the sensitivity of a scintillator, its thickness must be increased; however, spatial resolution deteriorates with increasing thickness. Here, we developed a well-aligned Tb-doped GdAlO3-αAl2O3 phase-separated scintillator fiber (PSSF) with a diameter of 1.25-μm by a micro-pulling-down method. The luminescence, scintillation, and imaging performances of a grown PSSF sample were evaluated. X-ray-induced radioluminescence measurements of the sample showed Tb3+ 4f–4f emissions in the wavelength range of 470–700 nm, and the maximum emission peak was at 550 nm. The contrast transfer function at 10 lp/mm was 82% for both 270 and 500 μm-thick PSSF samples. We calculated the luminescence index, which is the product of the scintillator’s light yield and sensitivity, of the samples and compared their values with commercially available conventional CsI:Tl columnar scintillators. The Tb-doped GdAlO3-αAl2O3 PSSF exhibits higher contrast transfer function and luminescence index values at above 60 keV x-ray region compared with the tested conventional scintillators. |
| first_indexed | 2024-04-10T04:23:33Z |
| format | Article |
| id | doaj.art-206a53bc513541658d909d1b0a7607bf |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-04-10T04:23:33Z |
| publishDate | 2023-02-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-206a53bc513541658d909d1b0a7607bf2023-03-10T17:26:22ZengAIP Publishing LLCAIP Advances2158-32262023-02-01132025364025364-810.1063/5.0136069Development and x-ray imaging performance of Tb-doped GdAlO3-αAl2O3 submicron-diameter phase-separated scintillator fibersM. Yoshino0K. Kamada1S. Yamamoto2R. Yajima3R. Sasaki4M. Sagisaka5J. Kataoka6T. Horiai7Y. Yokota8A. Yoshikawa9New Industry Creation Hatchery Center, Tohoku University, Sendai 982-8579, JapanNew Industry Creation Hatchery Center, Tohoku University, Sendai 982-8579, JapanFaculty of Science and Engineering, Waseda University, Tokyo 169-8555, JapanDepartment of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, JapanDepartment of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, JapanFaculty of Science and Engineering, Waseda University, Tokyo 169-8555, JapanFaculty of Science and Engineering, Waseda University, Tokyo 169-8555, JapanNew Industry Creation Hatchery Center, Tohoku University, Sendai 982-8579, JapanInstitute for Materials Research, Tohoku University, Sendai 980-8577, JapanNew Industry Creation Hatchery Center, Tohoku University, Sendai 982-8579, JapanScintillators are key components in high-energy x-ray detectors for x-ray computed tomography, which are applied in medical diagnosis, nondestructive testing, and security inspection. Scintillators in x-ray imaging are required to have both high spatial resolution and sensitivity; however, a trade-off between spatial resolution and sensitivity exists. To improve the sensitivity of a scintillator, its thickness must be increased; however, spatial resolution deteriorates with increasing thickness. Here, we developed a well-aligned Tb-doped GdAlO3-αAl2O3 phase-separated scintillator fiber (PSSF) with a diameter of 1.25-μm by a micro-pulling-down method. The luminescence, scintillation, and imaging performances of a grown PSSF sample were evaluated. X-ray-induced radioluminescence measurements of the sample showed Tb3+ 4f–4f emissions in the wavelength range of 470–700 nm, and the maximum emission peak was at 550 nm. The contrast transfer function at 10 lp/mm was 82% for both 270 and 500 μm-thick PSSF samples. We calculated the luminescence index, which is the product of the scintillator’s light yield and sensitivity, of the samples and compared their values with commercially available conventional CsI:Tl columnar scintillators. The Tb-doped GdAlO3-αAl2O3 PSSF exhibits higher contrast transfer function and luminescence index values at above 60 keV x-ray region compared with the tested conventional scintillators.http://dx.doi.org/10.1063/5.0136069 |
| spellingShingle | M. Yoshino K. Kamada S. Yamamoto R. Yajima R. Sasaki M. Sagisaka J. Kataoka T. Horiai Y. Yokota A. Yoshikawa Development and x-ray imaging performance of Tb-doped GdAlO3-αAl2O3 submicron-diameter phase-separated scintillator fibers AIP Advances |
| title | Development and x-ray imaging performance of Tb-doped GdAlO3-αAl2O3 submicron-diameter phase-separated scintillator fibers |
| title_full | Development and x-ray imaging performance of Tb-doped GdAlO3-αAl2O3 submicron-diameter phase-separated scintillator fibers |
| title_fullStr | Development and x-ray imaging performance of Tb-doped GdAlO3-αAl2O3 submicron-diameter phase-separated scintillator fibers |
| title_full_unstemmed | Development and x-ray imaging performance of Tb-doped GdAlO3-αAl2O3 submicron-diameter phase-separated scintillator fibers |
| title_short | Development and x-ray imaging performance of Tb-doped GdAlO3-αAl2O3 submicron-diameter phase-separated scintillator fibers |
| title_sort | development and x ray imaging performance of tb doped gdalo3 αal2o3 submicron diameter phase separated scintillator fibers |
| url | http://dx.doi.org/10.1063/5.0136069 |
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