BU Dental Radiology EXAM WITH |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
CORRECT ANSWERS |||\\\
What does the x-ray tube contain? - correct answer✔✔cathode anode and focusing cup
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Who discovered what x-rays were? - correct answer✔✔Wilhelm Conrad Roentgen
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Properties of Xrays - correct answer✔✔1. X-rays are weightless package of pure energy
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2. They have no electrical charge
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3. They travel at the speed of light
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4. They travel in straight line but diverge from a central focus
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5. They have enough energy to ionize and cause biological damage
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6. They can cause certain substances to fluoresce and affect photographic film.
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In a dental x-ray tube the electrons are emitted from the what? - correct answer✔✔Cathode
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(-)
X-ray is produced when electrons moving at a high speed hit the tungsten target in a x-ray
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tube. - correct answer✔✔True |||\\\ |||\\\ |||\\\ |||\\\
an assistant may hold the film or sensor in place for the pt during exposure - correct
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answer✔✔False
As soon as a film or sensor is placed in a pt's mouth it is considered contaminated? - correct
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answer✔✔True
, X-rays are ionizing radiation. - correct answer✔✔True
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Bitewings show what? - correct answer✔✔Crowns and permant fixtures are interporximal |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
surfaces of the teeth. |||\\\ |||\\\ |||\\\
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
Pt;s should be drapped with a led apron prior to any radiographic images? - correct
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
answer✔✔True
Which if not a safety precaution for taking x-rays?|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
-Always stand behind an appropriate barrier? |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
-Never stand in the path of primary radiation |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
-Never stabilize the tube head during radiation |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
-If neccessary hold the film in the pt's mouth - correct answer✔✔If neccessary hold the film in
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
the pt's mouth, never hold the film or sensor in the pts mouth.
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
X-rays travel at the speed of light? - correct answer✔✔True
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Nerve cells can be regennerated? - correct answer✔✔False, No- Dense things like bone can
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
and perm fixtures, restorations.
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Which of these have an infulence on radiation protection?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
-Safe equipment |||\\\
-Skilled operator |||\\\
CORRECT ANSWERS |||\\\
What does the x-ray tube contain? - correct answer✔✔cathode anode and focusing cup
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Who discovered what x-rays were? - correct answer✔✔Wilhelm Conrad Roentgen
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Properties of Xrays - correct answer✔✔1. X-rays are weightless package of pure energy
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
2. They have no electrical charge
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
3. They travel at the speed of light
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
4. They travel in straight line but diverge from a central focus
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
5. They have enough energy to ionize and cause biological damage
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
6. They can cause certain substances to fluoresce and affect photographic film.
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
In a dental x-ray tube the electrons are emitted from the what? - correct answer✔✔Cathode
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
(-)
X-ray is produced when electrons moving at a high speed hit the tungsten target in a x-ray
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
tube. - correct answer✔✔True |||\\\ |||\\\ |||\\\ |||\\\
an assistant may hold the film or sensor in place for the pt during exposure - correct
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
answer✔✔False
As soon as a film or sensor is placed in a pt's mouth it is considered contaminated? - correct
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
answer✔✔True
, X-rays are ionizing radiation. - correct answer✔✔True
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Bitewings show what? - correct answer✔✔Crowns and permant fixtures are interporximal |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
surfaces of the teeth. |||\\\ |||\\\ |||\\\
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
Pt;s should be drapped with a led apron prior to any radiographic images? - correct
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
answer✔✔True
Which if not a safety precaution for taking x-rays?|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
-Always stand behind an appropriate barrier? |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
-Never stand in the path of primary radiation |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
-Never stabilize the tube head during radiation |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
-If neccessary hold the film in the pt's mouth - correct answer✔✔If neccessary hold the film in
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
the pt's mouth, never hold the film or sensor in the pts mouth.
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
X-rays travel at the speed of light? - correct answer✔✔True
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Nerve cells can be regennerated? - correct answer✔✔False, No- Dense things like bone can
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
and perm fixtures, restorations.
|||\\\ |||\\\ |||\\\
Which of these have an infulence on radiation protection?
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
-Safe equipment |||\\\
-Skilled operator |||\\\
