radiographic beam restrictors
Help!
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| Factors affecting scatter | kV, FOV, thickness of part
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| Devices to control scatter | cones/cylinders, aperture diaphragms, collimators, filters, grids, lead blockers
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| Effects of increased collimation | decreased exposure, density, scatter, FOV, # of photons striking the IR, increased contrast, visibility of detail
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| Effects of scatter | emitted isotropically from patient, 10-90% of film density, affects density, contrast and visibility of detail
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