Tag: Plain Radiography

Geometric Magnification

in Display,

For plain radiographs (conventional x-rays), the size recorded on the film is always larger than the size of the object being imaged, due to an effect called geometric magnification. Moreover, as shown in the diagram below, the amount of magnification varies for different objects, depending on their distance from the film, so it is NOT in general possible to “correct” for such magnification without knowing the distance of the object from the film.

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