Patent ID: 6220751
Filing Date: 2001-04-24
Classification: A61B,G21K

Abstract:
Apparatus for enhancing a cephalometric image on a film produced by directing an x-ray beam from a source through a patient's head to a cassette containing the film in a plane parallel to the median plane, the cassette having first and second ends and a single uniformly responsive conversion screen means for responding to x-rays impinging on the screen means by producing energy that exposes the film, said apparatus including a sheet interposed between the film and the screen means, said sheet having an optically transparent portion and a substantially optically opaque portion, said optically opaque portion overlying the film proximate the front cassette and in an area that is in alignment with the patient's forehead and chin and said substantially transparent portion overlying substantially the remainder of the film whereby an image produced on the film depicts skeletal features in the area aligned with said transparent portion and skeletal and soft tissue features in the area aligned with the substantially optically opaque area.