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The purpose of the project described here was to develop a teaching aid for oral roentgenology. Windows were prepared in the maxilla and mandible of a skull so that a light source, representing the focal spot of an x-ray machine, passing through the window would produce an image on a film packet which is positioned by means of standard film-holding devices. This teaching aid offers the following advantages:
- 1.1. It serves as an intermediate step between classroom and clinic, reducing time consumption and unnecessary radiation during the trial-and-error period.
- 2.2. A concept of target-film-object relationship can be easily visualized.
- 3.3. This inexpensive laboratory teaching aid can be used in other than roentgenology courses.
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- A Simple Aid in Teaching the Principles of X-ray by Analogy With Light.Army D. Bull. 1943; 19: 72-75
© 1966 Published by Elsevier Inc.