METHOD OF SUPERIMPOSING THE RADIATION EMISSION FROM A RADIOACTIVE TRACER ON AN X-RAY IMAGE

摘要

A system for taking a radiograph of a foreground subject in which a radioactive material is distributed on a film by an X-ray radiographic apparatus having a spark chamber. The radiograph consists of an X-ray transmission image of said subject and a discharge image indicating the distribution of said radioactive material. Said both images have the same scale and are superposed on each other.