Domain III A&B Flashcards
The inherent filtration of a dental x-ray machine is equivalent to _________ mm of aluminum?
0.5-1.0mm
True or False? Collimation is used to restrict the size and shape of the x-ray beam and to reduce patient exposure.
True
A rectangular collimator exposes ___% less tissue than a circular collimator.
60%
Total filtration thickness is regulated by who?
State and Federal lLaws
Which is preferred, 8-inch PID or 16-inch PID?
16 Inch PID
What items are used to limit x-ray exposure?
lead apron, thyroid collar, digital sensor, fast film, and beam alignment device.
How much lead is needed in a lead apron to be effective?
0.25mm of lead or lead equivalent
The use of _________ is the most effective method of reducing a patient’s radiation exposure?
digital receptor
Operators should use an optimal kilovoltage setting of _______kV, and a milliamperage setting of _____.
60-80 kV, 6-8 mA
What device is used to measure the amounts of radiation that reaches the body?
Radiation monitoring badge
What is MPD?
Maximum permissible dose
What is the MPD for those who work with radiation?
50mSv/year and to never exceed that
The nonoccupational dosage is _________mSv/year.
1 mSv/year (0.1 rem/year)
What does ALARA stand for?
“As low as reasonably achievable”
X-ray machines operating at or below _____ kV require a minimum total of _____mm aluminum filtration.
70kV, 1.5mm
