If pt is a gagger, which film should be taken first? - ANSWERAnterior Films
Which exposure technique will reduce radiation to the eye and thyroid gland? - ANSWERParalleling Technique
What types of light is allowed in the Dark Room? - ANSWERSafelighting: 7-5 watts, red-orange spectrum
Overhea...
DASLE Radiology review Question &
Answers 100%
If pt is a gagger, which film should be taken first? - ANSWERAnterior Films
Which exposure technique will reduce radiation to the eye and thyroid gland? -
ANSWERParalleling Technique
What types of light is allowed in the Dark Room? - ANSWERSafelighting: 7-5 watts, red-
orange spectrum
Overhead light: for cleaning and visibility
What causes cone cutting of the film image? - ANSWERIncorrect PID alignment.
Exposure error: the entire film was not exposed.
What causes white, chalky spots on film? - ANSWERWater spots on film.
Fixer spots are white or lighter areas.
If the film is curved or over-contoured, how will the radiographic image appear? -
ANSWERDistorted or Elongated.
Define overlapping - ANSWEROne image is superimposed over another image-caused
by incorrect horizontal angulation when the central ray is not directed through the
interproximal spaces of the teeth.
Which technique causes the zygomatic to be superimposed on the roots of the MX
molar? - ANSWERBisecting Technique- the primary x-ray beam is aligned with the
bisector, an imaginary line between the film and long axis of tooth.
If you use too much VA how will the radiograph appear? - ANSWERForshortened
Which type of radiation is the most hazardous to the operator? - ANSWERScatter
Radiation
3 types of radiation: 1. Primary - ANSWERradiation emanates from focal area as a
result of high-speed electrons hitting the target of the anode in the x-ray tubehead.
3 types of radiation: 2: Secondary - ANSWERresult of interaction of primary radiation
with matter.
created when primary beam interacts with matter.
3 types of radiation: 3. Scatter - ANSWERresults from an x-ray beam that has been
deflected from it's path by interaction with matter
, How should films be stored? - ANSWERDry, cool, dark place
Explain why the body cannot be exposed to a large amount of radiation in a short period
of time. - ANSWERcells do not have time to repair themselves and results in damage
that cannot be repaired.
If the exposure time, KVP, and Ma have been set correctly, the most important
controlling factor for image definition is the ______ and ______ of the pt. -
ANSWERPositioning and cooperation.
The exposure time of a dental radiograph should be _______ for a child than that of an
adult. - ANSWERLess
Quantity of dental radiographs is controlled by the ____ of the radiographic machine. -
ANSWERmA's
What causes forshortening? - ANSWERToo much VA.
What causes Elongation? - ANSWERNot enought VA.
Define Ionization. - ANSWERwhen electron is ejected from it's shell in a stable or
neutral atom.
when an electron is removed from an atom.
Maximum Permissible Dose of Radiation. Occupational and Non-occupational. -
ANSWEROccupational: 5.0 rems/year or 0.05sv
Non-occupational: 0.1 rems/year or 0.001sv
Which cells are most sensitive to radiation? High sensitivity. - ANSWERCells that are
developmental/forming: Lymphoid organs, bone marrow, testes, intestines, skin.
Which cells are most sensitive to radiation? Intermediate Sensitivity. - ANSWEREasily
repaired: fine vasculature, growing cartilage, growing bone.
Which cells are most sensitive to radiation? Low sensitivity. - ANSWERSalivary glands,
lungs, kidneys, liver, optic lens, muscle cells, neurons.
Purpose of lead foil? - ANSWERreduce film fogging caused by scatter radiation.
Why are films washed after developing, before placed in fixer? - ANSWERto remove
developer chemicals which can neutralize or weaken fixer solution if not removed.
What is the ideal developing temp and time? - ANSWER68 degrees for 4-4 1/2 mins
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