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Fig. 2B X-ray beam pattern over breast for appendicitis protocol. Exposed
film after CT shows black lines (more exposure) when X-ray beam course is
anterior to patient alternating with white lines that are produced when X-ray
beam is posterior to patient. Note that MOSFET (metal oxide semiconductor
field effect transistor) sensor size and location in breast do not permit
direct exposure unless helical course brings X-ray beam precisely over
detector. Red dots indicate location of MOSFET detectors at 9-, 6-, and
3-o'clock positions.
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