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Hardware Type
Imaging Systems

A simple x-ray system consists of a high-voltage generator, an x-ray tube, a collimator (used to restrict the beam of a radiotherapy machine to a specific area), a grid, an intensifying screen, film and the subject.

The x-ray film is made by projecting x-rays through organs or structures of the body onto photographic film. Because some tissue allows less x-rays to pass through than other tissue, a shadow is created on the film that is the image of the radiopaque substance. Dense structures, such as bone, allow few x-rays to pass through, so the film is only slightly exposed; such structures appear white on the film. Hollow structures, such as the lungs, allow most of the radiation to pass through, almost fully exposing the film; such structures appear black on the image. For a chest x-ray, the subject stands between the x-ray machine and the photographic film, and is asked to take a deep breath and hold it until the procedure is complete.

Versions of this Hardware
+ Version Used During the Late-Apollo and Skylab Missions
+ Version Used During the ASTP Mission
+ Version Used During the Mercury Missions
+ Version Used During the Gemini and Early-Apollo Missions