56 that is free of a tio coating is flexed and bonded to the surface of the glass substrate panel 52 using an epoxy sealant 74 thereby creating a second semi hermetic seal between the scintillator 54 and outside moisture in another embodiment as shown in fig5 an insulating layer 76 is deposited onto the glass substrate panel 52 in the area to be used for the seal over that a layer of metal 78 that can be reflowed during laser welding is then deposited the portion 70 of the opticlad layer 56 is then laser welded to the metal layer 78 on the top surface of the glass panel 52 thereby creating a second hermetic seal between the scintillator 54 and outside moisture in a third embodiment as shown in fig6 a metal frame 90 of length and width of the required seal and of a rectangular section approximately equal to that of the scintillator 54 is fabricated and sealed to the inner aluminum face 65 of the cover 58 and to the glass substrate using an epoxy sealant 92 the metal frame 90 thus replaces much of the volume of the epoxy seal resulting in a smaller cross sectional area of epoxy sealant 92 for moisture to diffuse through in a fourth embodiment as shown in fig7 which also utilizes the metal frame 90 a metal 93 such as nickel or gold that can be welded or soldered is deposited on the inner aluminum face 65 of the cover 58 the metal frame 90 is then welded or soldered directly to that deposited metal layer 93 to create a cover layer with the metal frame 90 attached as compared to epoxy seal as in fig6 described above this eliminates.