Comparative study of luminescence properties of LuYAP:Ce and LYSO:Ce single-crystal scintillators for use in medical imaging
Comparative study of luminescence properties of LuYAP:Ce and LYSO:Ce single-crystal scintillators for use in medical imaging
复制标题
医学成像用 LuYAP:Ce 和 LYSO:Ce 单晶闪烁体发光特性的比较研究
DOI：
10.1016/j.nima.2007.05.023
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发表时间：
2007
影响因子：
1.4
通讯作者：
G. Panayiotakis
中科院分区：
文献类型：
--
作者：
I. Valais;S. David;C. Michail;D. Nikolopoulos;P. Liaparinos;D. Cavouras;I. Kandarakis;G. Panayiotakis
研究了医用X射线成像用Lu0.7Y0.3AlO3：Ce（LuYAP：Ce）和（Lu0.9，Y0.1）2SiO 5：Ce（LYSO：Ce）晶体的发光性能。LuYAP：Ce和LYSO：Ce是高密度、不吸湿、高光产额和短衰减时间的单晶发光材料。两个掺铈晶体的尺寸均为2×2× 8 mm 3，表面均抛光。通过确定一般医学X射线成像（40- 140 kVp）和乳腺X射线成像（22- 49 kV）中采用的X射线能量的绝对发光效率（入射X射线暴露的发射光通量）进行评价。此外，还测量了各种X射线能量下的光发射光谱，以确定与医学成像系统中的光学光子探测器的光谱兼容性。的光学特性，如发射光谱，进行了研究，并指出与闪烁性能的重要相关性。研究的两种闪烁材料的光发射性能被发现足够高的医疗X射线成像。
The luminescence properties of Lu0.7Y0.3AlO3:Ce (LuYAP:Ce) and (Lu0.9,Y0.1)2SiO5:Ce (LYSO:Ce) crystals were studied for use in medical X-ray imaging. LuYAP:Ce and LYSO:Ce are single-crystal scintillators of high density, non-hygroscopic, high light yield and short decay time. The two cerium doped crystals have dimensions of 2×2×8mm3with all surfaces polished. Evaluation was performed by determining the absolute luminescence efficiency (emitted light flux over incident X-ray exposure) in X-ray energies employed in general medical X-ray imaging (40–140kVp) and in mammographic X-ray imaging (22–49kV). Additionally, the light emission spectrum at various X-ray energies was measured in order to determine the spectral compatibility to optical photon detectors, incorporated in medical imaging systems. The optical characteristics, such as emission spectra, were investigated and important correlations with the scintillation properties were pointed out. The light emission performance of the two scintillation materials studied was found adequately high for medical X-ray imaging.