Patent Number: 044906161
Section: claims

1. A radiation shield adapted to be used in combination with an X-ray tube and a cephalometric X-ray head holder containing alignment ear rods comprising: a shield surface constructed of a material which is impervious to radiation, said surface adapted to be placed between the skull of the patient and the X-ray beam; and  alignment means attached to said shield surface, said alignment means containing an aperture for cooperation with the alignment ear rods of the cephalometric head holder.  a shield surface constructed of a material which is impervious to radiation, said surface adapted to be placed between the skull of the patient and the X-ray beam;  alignment rods attached to the cephalometric head holder, and  alignment means attached to said shield surface, said alignment means containing an aperture for cooperation with said alignment ear rods of the cephalometric head holder. 2. A radiation shield as claimed in claim 1 further including a means of stabilizing said shield against movement. 3. A radiation shield as claimed in claim 1 wherein said shield surface is planar. 4. A radiation shield as claimed in claim 1 wherein said shield surface contains a flap which can be elevated to expose the base of the skull. 5. A radiation shield as claimed in claims 2 or 3 wherein said shield surface contains a flap which can be elevated to expose the base of the skull. 6. A radiation shield adapted to be used in combination with a cephalometric X-ray head holder and X-ray tube comprising: 7. A radiation shield as claimed in claim 6 further including a means of stabilizing said shield against movement. 8. A radiation shield as claimed in claim 6 wherein said shield surface is planar. 9. A radiation shield as claimed in claim 6 wherein said shield surface contains a flap which can be elevated to expose the base of the skull. 10. A radiation shield as claimed in claims 7 or 8 wherein said shield surface contains a flap which can be elevated to expose the base of the skull.