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medical systems
- In radiation: Imaging techniques
Advances in techniques for obtaining images of the body’s interior have greatly improved medical diagnosis. New imaging methods include various X-ray systems, positron emission tomography, and nuclear magnetic resonance imaging.
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optics and optical systems
- In optics: Temporal frequency response
The object, then, to be imaged by the optical system consists of a spatial distribution of intensity of a single spatial frequency—an object the intensity of which varies as (1 + a cos ωx), in which x is the spatial coordinate, a is a constant called the contrast, and ω…
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