Abstract: A device for producing plural lines on a film bearing a radiographic image of a portion of the body of a living being to facilitate the location of a part of the being's body within that image. The device comprises a flexible substrate formed of a porous, translucent or transparent material having lines of a radio-opaque material disposed thereon and is made by the application a slurry of a plastisol material and lead particles in the line pattern on the substrate and then drying the slurry. The device is used by applying it over a selected portion of the body of a being, disposing a radiosensitive film under the selected portion of the being's body, exposing the film to radiation, and thereafter developing the film. The resulting radiographic image of the selected portion of the being's body thus has indicator lines crossing it which facilitates the demarcation of a desired portion of that image. A marking instrument, e.g.

Abstract: A device for producing plural lines on a film bearing a radiographic image of a portion of the body of a living being to facilitate the location of a part of the being's body within that image. The device comprises a flexible substrate having lines of a radio-opaque material disposed thereon and is made by the application a slurry of a plastisol material and lead particles in the line pattern on the substrate and then drying the slurry. The device is used by applying it over a selected portion of the body of a being, disposing a radiosensitive film under the selected portion of the being's body, exposing the film to radiation, and thereafter developing the film. The resulting radiographic image of the selected portion of the being's body thus has indicator lines crossing it which facilitate the demarcation of a desired portion of that image. In one preferred embodiment the substrate of the device includes plural openings in the lines so that a marking instrument, e.g.