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4137 Radiology

A 26 year old male presented to the dental clinic with pain in the right lower back tooth region. On examination, it was evident that pericoronitis is present with #48. The inherent filtration of the machine used is 3 mm of Aluminium operating at 70 kVp. By the use of this machine, the surface exposure:

AReduces to 20% of the exposure without filtration
BReduces to 80% of the exposure without filtration
CReduces to 30% of the exposure without filtration
DIs not reduced at all
Radiology
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