What is the purpose of radiographic beam filtration?
a. To reduce exposure to the patient's skin and superficial tissues by absorbing most of the higher-energy photons from the heterogeneous beam.
b. To reduce exposure to the patient's skin and superficial tissues by absorbing most of the lower-energy photons from the heterogeneous beam.
c. To reduce exposure to the patient's skin and superficial tissues by absorbing all of the higher-energy photons from the homogeneous beam.
d. To reduce exposure to the patient's skin and superficial tissues by removing all the lower-energy photons from the homogeneous beam.
b. To reduce exposure to the patient's skin and superficial tissues by absorbing most of the lower-energy photons from the heterogeneous beam.
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