A new lutetia-based ceramic scintillator for X-ray imaging

Łempicki, A.; Brecher, C.; Szupryczyński, P.; Lingertat, H.; Nagarkar, Vivek V.; Tipnis, Sameer; Miller, Stuart

doi:10.1016/s0168-9002(02)00556-9

Cited by 194 publications

(100 citation statements)

References 9 publications

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“…where q is the number of photons per air kerma unit (lGy) per mm 2 , determined by dividing the number of photons per mm 2 (measured with the portable X-ray spectrometer) with the corresponding air kerma value (measured with the Piranha dosimeter). K a is the air kerma value at the surface of the detector in lGy.…”

Section: Detective Quantum Efficiency (Dqe)mentioning

confidence: 99%

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On the response of semitransparent nanoparticulated films of LuPO4:Eu in poly-energetic X-ray imaging applications

et al. 2016

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In the present work, we demonstrate the fabrication technique of highly translucent layers of nanoparticulated (*50 nm) LuPO 4 :Eu phosphor, present their basic luminescent properties and give results of their performance in a planar imaging system coupled to a CMOS photodetector. For comparison, the imaging performance of an opaque Gd 2 O 2 S:Eu phosphor screen prepared by sedimentation is also shown. The X-ray detection parameters as well as the luminescence efficiency of the investigated films were discussed. Results show that the in-line transmittance at *600-700 nm, in the range of the phosphor luminescence, varies with respect to the thickness of the films from 40 to 50 % for a film of 67 lm thick to 4-12 % when the thickness increases to 460 lm. Yet, X-ray detection parameters get enhanced as the thickness of the films increases. Those results affect the luminescence efficiency curves of the films under poly-energetic X-ray radiation of various tube energies. The normalized noise power spectrum values were found similar for LuPO 4 :Eu films and a phosphor screen made using commercial Gd 2 O 2 S:Eu powder. The detective quantum efficiency of our films is clearly lower compared to the Gd 2 O 2 S:Eu screen from 2 to 10 cycles mm -1 frequency range while the modulation transfer function is lower from 0 to 5.5 cycles mm -1 frequency range. The acquired data allow to predict that high-temperature sintering of our films under pressure may help to improve their imaging quality, since such a processing should increase the luminescence efficiency without significant growth of the grains and thus without sacrificing their translucent character.

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Section: Detective Quantum Efficiency (Dqe)mentioning

confidence: 99%

“…In imaging applications, transparent scintillator/X-ray phosphor materials appear to limit images resolution due to high scintillating light diffusion. To reduce this effect, pixelated detectors were produced and tested [2,3]. While the improvement was significant, the technology appeared quite expensive as laser etching was necessary.…”

Section: Introductionmentioning

confidence: 99%

On the response of semitransparent nanoparticulated films of LuPO4:Eu in poly-energetic X-ray imaging applications

et al. 2016

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“…Eu 3+ was studied as a highly efficient scintillator for digital radiography and fluoroscopy, to on the grounds that its X-ray stopping power is even greater than yttria-gadolinia [72]. Both laser and scintillator materials were produced by co-precipitation of rare-earth nitrate solutions using oxalic acid.…”

Section: Scintillators-eumentioning

confidence: 99%

Tailored Ceramics for Laser Applications

Hollingsworth

2007

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“…They can be used for low-temperature synthesis of ceramics, as phase stabilizers 11 as well as scintillator materials in nuclear engineering. 12 We have successfully grown single crystals of Sc 3 CrO 6 from Sc 2 O 3 -Cr 2 O 3 melt at ambient pressure. The crystal structure was determined as rhombohedral R3 (Mg 3 TeO 6 structural type).…”

Section: Introductionmentioning

confidence: 99%

Raman spectroscopy and lattice-dynamical calculations of Sc3CrO6single crystals

et al. 2012

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Single crystals of Sc 3 CrO 6 were grown by high temperature solution growth method. They were studied using x-ray single crystal diffractometry, scanning electron microscopy (SEM) with x-ray microprobe analysis and micro-Raman spectroscopy. The crystal structure was refined as rhombohedral one with space group R3, which confirms that it belongs to the Mg 3 TeO 6 -structural type family. In the polarized Raman spectra collected at room temperature all 9A g + 9E g Raman-allowed phonon modes were observed. The experimentally determined frequencies are compared to the results of lattice-dynamical calculations (LDC) using a shell model. The Raman spectra, obtained with increasing temperature up to 600 • C, do not provide direct indication for structural phase transition. The decrease with increasing temperature of the relative intensity of five A g lines compared to the rest ones, however, suggests a possible structural phase transition from R3 to R3c above the investigated temperature region.

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A new lutetia-based ceramic scintillator for X-ray imaging

Cited by 194 publications

References 9 publications

On the response of semitransparent nanoparticulated films of LuPO4:Eu in poly-energetic X-ray imaging applications

On the response of semitransparent nanoparticulated films of LuPO4:Eu in poly-energetic X-ray imaging applications

Tailored Ceramics for Laser Applications

Raman spectroscopy and lattice-dynamical calculations of Sc3CrO6single crystals

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