Flat Panel X-ray Imaging of LuAG:Ce,Mg Ceramic Scintillators

doi:10.15541/jim20150046

Abstract

Abstract:

(Lu, Mg, Ce)₃Al₅O₁₂ (LuAG: Ce, Mg) transparent ceramic scintillators (LuAG: 0.3at% Ce, 0.2at% Mg) with high optical and scintillation efficiency were fabricated by solid-state reaction method combined with vacuum sintering. The ceramic scintillator with dimension of 20 mm×20 mm×0.05 mm was packed with graphite substrate of 25 mm×25 mm×4 mm by graphite powders contained silica gel. Laser cutting of cubic array with dimension of 50 μm×50 μm and distance of 10 μm was performed. Flat panel X-ray imaging based on as prepaired ceramics was demonstrated. The images were good quality with a high resolution. The quality of the photos were evaluated by line-pair pattern method and knife edge method, respectively. MTF value of 17.5% was at 10 lp/mm for the ceramic scintillators after laser cutting, while resolution of 9 lp/mm achieved at 10% MTF by knife edge measurement. Based on above data, LuAG:Ce,Mg ceramics are proved to be a promising scintillator in flat panel X-ray imaging.

Key words: LuAG:Ce, Mg, ceramic scintillators, flat panel detector, X-ray imaging

CLC Number:

TL812

HU Chen, LIU Shu-Ping, FENG Zhao-Dong, QIN Xiu-Bo, SHI Yun, PAN Yu-Bai. Flat Panel X-ray Imaging of LuAG:Ce,Mg Ceramic Scintillators[J]. Journal of Inorganic Materials, 2015, 30(8): 814-818.

Figures/Tables 8

Fig. 1 Transmission and photograph of LuAG:Ce,Mg ceramics fabricated by solid-state reaction method (2 mm thick)

Fig. 2 Radioluminescence spectra of LuAG:Ce,Mg ceramics and BGO single crystal

Fig. 3 Sketchof flat panel imaging

Fig. 4 Photographs of laser cut ceramics samples taken by optical microscope and digital camera

Fig. 5 X-ray imaging of standard line-pair pattern by ceramics samples (a) without and (b) with cutting

Fig. 6 MTF value of ceramics samples with and without laser cutting by line-pair pattern method

Fig. 7 X-ray imaging of knife edge by ceramic samples (a) without and (b) with cutting

Fig. 8 MTF curve of ceramics samples with and without laser cutting measured by knife edge method

References 10

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