Storage Phosphors for Medical Imaging

Materials

Paul Leblans¹  Dirk Vandenbroucke¹ 

[1] Agfa HealthCare NV, Septestraat 27, B-2640 Mortsel, Belgium; E-Mail:

关键词: computed radiography;    storage phosphor;    X-ray;    optically stimulated lumi-nescence;    BaFBr:Eu²⁺;    CsBr:Eu²⁺;    needle imaging plate;    image quality;   

DOI  :  10.3390/ma4061034

来源: mdpi

【 摘 要 】

Computed radiography (CR) uses storage phosphor imaging plates for digital imaging. Absorbed X-ray energy is stored in crystal defects. In read-out the energy is set free as blue photons upon optical stimulation. In the 35 years of CR history, several storage phosphor families were investigated and developed. An explanation is given as to why some materials made it to the commercial stage, while others did not. The photo stimulated luminescence mechanism of the current commercial storage phosphors, BaFBr:Eu²⁺ and CsBr:Eu²⁺ is discussed. The relation between storage phosphor plate physical characteristics and image quality is explained. It is demonstrated that the morphology of the phosphor crystals in the CR imaging plate has a very significant impact on its performance.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.