An evaluation of a new radiographic technique utilizing a concave table

In conventional radiography systems, it is apparent that only the area imme diately around the central x-ray beam can be evaluated accurately. Conseque ntly in some instances, spinal radiography for example, several exposures a re needed at various paints along the body to create an accurate image for diagnosis. However, if the film and body part are in a concave shape such t hat the radius of the curve is equal to the film focal distance, the x-ray beam will penetrate the body and strike the film at two-dimensionally right angles in all areas. Using the spine as an example we found the curved tec hnique had three major advantages over the traditional flat technique: lack of distortion, more uniform beam intensity due to a constant focal film di stance, and improved resolution at the periphery of the radiograph because of lack of a cross over effect, It was concluded that an accurate evaluatio n of larger body parts can be made with minimal distortion utilizing the pr inciples of a curved table technique.