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