High energy X-ray computed tomography for industrial applications

Izumi, Shigeru; Kamata, Satsuo; Satoh, K.; Miyai, H.

doi:10.1109/23.212333

Cited by 50 publications

(15 citation statements)

References 2 publications

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“…Today the main scintillating materials for medical imaging are 8 Gd 2 O 2 S:Pr,Ce,F [1], (Y,Gd)O 3 :Eu,Pr [2] and CdWO 4 [3,4] for X-ray Computed 9 Tomography (CT) whereas BGO (Bi 4 Ge 3 O 12 ) [5,6], NaI:Tl [7], LYSO 10 ((Lu,Y)SiO 5 :Ce 3+ ) [8,9] and LPS (Lu 2 Si 2 O 7 ) [10,11,12] are often used for Positron 11…”

Section: Introduction 1mentioning

confidence: 99%

“…High density and high 17 effective atomic number are required for the host material. In that respect lutetium 18 sesquioxide Lu 2 O 3 constitutes one of the best possible hosts with a density of 9.43 19 g/cm 3 and an effective atomic number Z eff of 69. With its cubic structure it can be 20 synthesized as a transparent ceramics which is very advantageous to produce 21 scintillators at a lower cost.…”

Section: Introduction 1mentioning

confidence: 99%

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Improved scintillation time response in (Lu_0.5Gd_0.5)₂O₃ : Eu³⁺ compared with Lu₂O₃ : Eu³⁺ transparent ceramics

Rétot¹,

Blahuta²,

Bessière³

et al. 2011

J. Phys. D: Appl. Phys.

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The scintillation properties of two sesquioxides ceramics Lu2O3 : Eu3+ and (Lu0.5Gd0.5)2O3 : Eu3+ were studied. Both ceramics present comparable transparency and light yield whereas (Lu0.5Gd0.5)2O3 : Eu3+ showed an order of magnitude reduced afterglow in the 3–300 ms range. A thorough study of the location and behaviour of Eu3+ dopant ions at C2 and S6 sites of Lu2O3 and (Lu0.5Gd0.5)2O3 structures was carried out with low-temperature selective excitation of Eu3+. This revealed that (i) at both C2 and S6 sites, Eu3+ 4f–4f lifetime is shorter in (Lu0.5Gd0.5)2O3 : Eu3+ than in Lu2O3 : Eu3+, (ii) the host matrix (Lu0.5Gd0.5)2O3 as compared with Lu2O3 favours the location of Eu3+ at C2 site. As decay times of Eu3+ in C2 and S6 sites are 1.0 ms and 3.8 ms, respectively, the preferred occupation of C2 in (Lu0.5Gd0.5)2O3 : Eu3+ implies a much shorter decay time for (Lu0.5Gd0.5)2O3 : Eu3+ in the 3–20 ms range. Reduction of afterglow in the 20–300 ms range is illustrated by thermally stimulated luminescence peaks presenting a highly reduced intensity for (Lu0.5Gd0.5)2O3 : Eu3+ compared with Lu2O3 : Eu3+ implying reduced charge trapping defects in (Lu0.5Gd0.5)2O3 : Eu3+ ceramics.

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Section: Introduction 1mentioning

confidence: 99%

Section: Introduction 1mentioning

confidence: 99%

Improved scintillation time response in (Lu_0.5Gd_0.5)₂O₃ : Eu³⁺ compared with Lu₂O₃ : Eu³⁺ transparent ceramics

Rétot¹,

Blahuta²,

Bessière³

et al. 2011

J. Phys. D: Appl. Phys.

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“…CdWO 4 :Mo single crystals were grown by spontaneous crystallization from high-temperature melts, using the slow cooling technique. The initial charge was 55%Na 2 WO 4 -16%CdO-(29-22)%WO 3 -(0-7)%MoO 3 . The crystallization temperature range was 1000-720°C and the cooling rate was 2-3° C/h.…”

Section: Methodsmentioning

confidence: 99%

“…Cadmium tungstate (CdWO 4 ) is a promising scintillation material for X-ray tomography, detection of slow neutrons, and dosimetry [1][2][3]. The large effective atomic number ( z eff = 61.2) and, correspondingly, high density (7.99 g/cm 3 ) provide effective scintillation detection even when a crystal is physically small [2].…”

Section: Introductionmentioning

confidence: 99%

“…The large effective atomic number ( z eff = 61.2) and, correspondingly, high density (7.99 g/cm 3 ) provide effective scintillation detection even when a crystal is physically small [2]. The luminescence spectrum of this compound is a wide band in the visible spectral range ( λ max ~ 500 nm) and its luminescence decay time is sufficiently short (about 10 µ s) for operation in intense X-ray fluxes [1].…”

Section: Introductionmentioning

confidence: 99%

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Optical and luminescence properties of CdWO4 and CdWO4:Mo single crystals

et al. 2008

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-Luminescence properties of a pure CdWO 4 crystal and a CdWO 4 :Mo crystal doped with molybdenum in different concentrations have been investigated. The effect of molybdenum impurity on the intrinsic luminescence of CdWO 4 has been found, and the role of the impurity in the formation of new luminescence centers has been investigated. The features of the formation of the intrinsic and impurity luminescence excitation spectra of CdWO 4 and CdWO 4 :Mo crystals in the fundamental-absorption region have been considered. The reflection spectra of the CdWO 4 crystal have been investigated taking into account the crystal structure anisotropy. PACS numbers: 78.55.-m, 78.40.-q

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A review: X‐ray excited luminescence of gadolinium based optoelectronic phosphors

Mahakhode¹,

Nande²,

Dhoble

2021

Luminescence

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X‐ray excited fluorescence tomography is an emerging field in the application of bio‐imaging and computer tomography. Some rare‐earth doped inorganic phosphors like gadolinium oxide (Gd2O3), yttrium oxide (Y2O3), zinc tungstate (ZnWO4), cesium fluoride (CsF), barium fluorochloride (BaFCl), lanthanum oxybromide (LaOBr) are shown outstanding applications for X‐ray excited phosphors. Gadolinium (Gd)‐based inorganic phosphors show extraordinary applications in the field of X‐ray chromatography and computer chromatography. In this review article, we discussed the general information about X‐ray excited luminescence (XEL) phosphor. Further, we discussed importance, synthesis, structural and photoluminescence (PL) properties of rare‐earth (Europium (Eu)) doped Gd2O3. To elaborate the scope of the review, we have discussed synthesis, structural and optical properties of lithium (Li) doped Gd2O3:Eu. At the end of the review, synthesis, structural and optical properties of Eu doped lutetium oxide (Lu2O3) have been discussed and the results compared with Eu doped Gd2O3. The comparison provided the understanding of structural and optical peak position of host and the dopant (Eu).

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High energy X-ray computed tomography for industrial applications

Cited by 50 publications

References 2 publications

Improved scintillation time response in (Lu_0.5Gd_0.5)₂O₃ : Eu³⁺ compared with Lu₂O₃ : Eu³⁺ transparent ceramics

Improved scintillation time response in (Lu_0.5Gd_0.5)₂O₃ : Eu³⁺ compared with Lu₂O₃ : Eu³⁺ transparent ceramics

Optical and luminescence properties of CdWO4 and CdWO4:Mo single crystals

A review: X‐ray excited luminescence of gadolinium based optoelectronic phosphors

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High energy X-ray computed tomography for industrial applications

Cited by 50 publications

References 2 publications

Improved scintillation time response in (Lu0.5Gd0.5)2O3 : Eu3+ compared with Lu2O3 : Eu3+ transparent ceramics

Improved scintillation time response in (Lu0.5Gd0.5)2O3 : Eu3+ compared with Lu2O3 : Eu3+ transparent ceramics

Optical and luminescence properties of CdWO4 and CdWO4:Mo single crystals

A review: X‐ray excited luminescence of gadolinium based optoelectronic phosphors

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Improved scintillation time response in (Lu_0.5Gd_0.5)₂O₃ : Eu³⁺ compared with Lu₂O₃ : Eu³⁺ transparent ceramics

Improved scintillation time response in (Lu_0.5Gd_0.5)₂O₃ : Eu³⁺ compared with Lu₂O₃ : Eu³⁺ transparent ceramics