Only one film should be placed in contact with the intensifying screens used for extraoral radiography.
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Q20: Each of the following appear radiopaque EXCEPT
Q21: Radiographic density (film darkening) is decreased when
Q22: The term "short-scale contrast" describes a radiograph
Q23: That portion of the radiographic image that
Q24: Theoretically, the ideal focal spot would be
Q26: Grids absorb scattered x-rays.
Q27: Slight movement of the tube head during
Q28: Thicker intensifying screens increase the sharpness of
Q29: A small focal spot reduces penumbra.
Q30: White areas on a radiographic image are
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