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CH 5 Radiation Protection

Terms in this set (61)

this causes biologic changes in living cells; it adversely affects all living tissue
x-radiation
our goal is to limit the amount of ___________ received by the patient & maximize benefits
radiation
With the use of proper _______ ___________ _____________, the amount of x-radiation received by a dental patient can be minimized.
patient protection techniques
what organizations have adopted guidelines for prescribing the number, type, & frequency of dental images?
1. ADA Council on Scientific Affairs
2. U.S. Dept. of Health & Human Services
3. Food & Drug Admin. (FDA)
each patient should be evaluated on an _____________ _______ to dertermine what x-ray images are necessary
individual basis
proper _____________ of dental x-ray images can minimize the amount of radiation exposure
prescribing
what is used to determine the number, type, and frequency of dental radiographs?
professional judgment
use of equipment that complies with ______ & ______ radiation guidelines will minimize the radiation a patient receives
>filtration, collimation & position-indicating device
state & federal
the x-ray tubehead should be properly equiped with?
aluminum filters, lead collimator & PID
This type of filtration takes place when the primary beam passes through the glass window of the x-ray tube, the insulating oil, and the tubehead seal.
-Is equivalent to approximately 0.5 to 1.0 mm of aluminum
-Does not meet the standards regulated by state and federal law, so additional filtration is required
inherent filtration
this type of filtration is composed of part of the x-ray tube & tube housing
inherent filtration
This is necessary to absorb the low-energy x-ray photons emitted by the tube before they hit their target.
filtration
This type of filtration is where an aluminum disk is placed between the collimator and the tubehead seal to filter out longer wavelength, lower energy x-rays from the x-ray beam.
-Filtration results in a higher-energy and more penetrating useful beam.
added filtration
For this type of filtration, thin sheets of metal are placed in the path of the x-ray beam.
added filtration
This type of filtration is the sum of inherent and added filtration
-Regulated by state and federal laws
-Machines operating at or below 70 kVp = Require a minimum total of 1.5 mm aluminum filtration
-Machines operating above 70 kVp = Require a minimum total of 2.5 mm aluminum filtration
total filtration
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