A radiographic device for deriving information from over-exposed film.

摘要

A device for recovering information from over-exposed regions of image recording emulsions in general, and radiographs in particular includes a light-tight housing (3, 4) the outer surface of which is covered with a layer of lead (4), a source (1) arranged to project ionizing radiation within said housing, and a removable cassette (5) which, in use, carries the over-exposed radiograph (12) in close contact with a further film (6) for recording the information. The cassette (5) has a light-tight cover (8) which is displaceable to permit exposure of the further film (6) to an image produced by irradiation of the over-exposed radiograph (12) by the source (1). The method includes irradiating the over-exposed radiograph, placed in close contact with a further film, by means of a device as aforesaid.