The function of the collimator in the dental x-ray machine is to
A) eliminate secondary sources of radiation.
B) reduce the size of the x-ray beam.
C) eliminate primary sources of radiation.
D) allow for faster exposure times.
B
Explanation: A) The collimator constricts the diameter of the x-ray beam to reduce the radiation dose to the patient by reducing the volume of tissue exposed.
B) The collimator constricts the diameter of the x-ray beam to reduce the radiation dose to the patient by reducing the volume of tissue exposed.
C) The collimator constricts the diameter of the x-ray beam to reduce the radiation dose to the patient by reducing the volume of tissue exposed.
D) The collimator constricts the diameter of the x-ray beam to reduce the radiation dose to the patient by reducing the volume of tissue exposed.
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