The present invention is directed to a scintillator array having an integrated air gap. By integrating an air gap within the reflector, light collection efficiency is improved while simultaneously lowering cross-talk between scintillators. That is, implementing a reflector without chromium oxide (Cr2O3)...http://www.google.com.hk/patents/US6947517?utm_source=gb-gplus-share專利 US6947517 - Scintillator array having a reflector with integrated air gaps