An apparatus to align the deposition of scintillator material on a radiation detector array includes a cover mask assembly configured to be positively positioned on a detector array and underlying pallet assembly to provide proper alignment of the mask with the array so that the active portion of the...http://www.google.com.au/patents/US6146489?utm_source=gb-gplus-sharePatent US6146489 - Method and apparatus for depositing scintillator material on radiation imager