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BU Dental Radiology final test Latest Update
- 100 Questions and 100%
Verified Correct Answers Guaranteed A+
1Gy= how many rad - CORRECT ANSWER: 100
1Sv= how many rem - CORRECT ANSWER: 100
A darkroom safe light should be at least how many feet away from the film being
opened? - CORRECT ANSWER: 4 feet
Absorbed does - CORRECT ANSWER: The ammount of energy imparted by ionizing
radiation per unit mass of irridated matter
an assistant may hold the film or sensor in place for the pt during exposure - CORRECT
ANSWER: False
Anode is what charge - CORRECT ANSWER: Postive
As soon as a film or sensor is placed in a pt's mouth it is considered contaminated? -
CORRECT ANSWER: True
at 50-70n kVp: mm - CORRECT ANSWER: 1.5
at above 70 kVp: mm - CORRECT ANSWER: 2.5
Atom - CORRECT ANSWER: smallest particle of an element possible of chemcial
reacton
Base for emulsion is mm what? - CORRECT ANSWER: 0.2mm
Binding energy is what - CORRECT ANSWER: Force that keeps electrons in their place
Bitewings show what? - CORRECT ANSWER: Crowns and permant fixtures are
interporximal surfaces of the teeth.
Cathode is waht charge - CORRECT ANSWER: Negative
CBCT - CORRECT ANSWER: cone beam computerized tomography
CCD - CORRECT ANSWER: charge coupled device
Collimation does what - CORRECT ANSWER: Reduces the beam size to the pt to only
2.75in 1 / 2
Collmation restricts the in maine to be not more then 2.75 inches T or F - CORRECT
ANSWER: T
Cumlative - CORRECT ANSWER: accumlating or building up effect
Degrees of parallelling - CORRECT ANSWER: 90
Density is what - CORRECT ANSWER: Darkness controlled by MA's
Dental radiographic exposure is wat mSv - CORRECT ANSWER: 0.150
During pregancy a partiant may be irradiated by taking necessary precations? True or
False - CORRECT ANSWER: True
Electrons are what - CORRECT ANSWER: Negatively charged
Electrons travel at what speed of light - CORRECT ANSWER: 1/2 the speed
Emulsion is - CORRECT ANSWER: Crystals senstive to radiation
Filters in an x-ray tube is made of what? - CORRECT ANSWER: Aluminum
Filtration absorbs the what - CORRECT ANSWER: Low energy xrays and reduced pt's
skin dose.
Filtration is what - CORRECT ANSWER: Absorbing
Fixing - CORRECT ANSWER: the chemcial removal of silver halidea after development
Focal spot - CORRECT ANSWER: Tungston
How do you arrange film on viewbox? - CORRECT ANSWER: Bump facing up, twords
ceiling
In a dental x-ray tube the electrons are emitted from the what? - CORRECT ANSWER: Cathode
In the paralleling technique the xray is directed perpendicular to the bisecting line between the angle of the long axis of the tooth and the film/sensor - CORRECT ANSWER: True, explain.. So when you are parallelling, the angle you make when you are bisecting is perpendicular to the angle
In your office the radiographs turn brown with age almost all of the time. What corrective
action do you take? - CORRECT ANSWER: Wash the film properly after fixing
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