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Radiology > Important Info 2.0 > Flashcards

Important Info 2.0 Flashcards

1
Q
A

incisive foramen

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2
Q
A

mandibular canal

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3
Q
A

nose

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4
Q
A

lingual foramen

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5
Q
A

internal oblique ridge

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6
Q
A

external oblique ridge

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7
Q
A

mental ridge

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8
Q
A

intermaxillary suture

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9
Q
A

genial tubercles

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10
Q
A

nasolabial fold

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11
Q
A

mental foramen

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12
Q

What was wrong with this radiograph?

A

foreshortening

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13
Q

What was wrong with this radiograph?

A

Backwards/Reversed Placement

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14
Q

Definition of maximum permissible dose

A

That amount of radiation which in the light of present knowledge will not produce any serious, harmful, or deleterious effects on the individual receiving it.

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15
Q

What is the most likely risk of radiation?

A
  • leukemia and thyroid cancer
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16
Q

Factors that increase biologic effect of x radiation?

A

O2 and young age

17
Q

SLOB rule states…

A
  • moved image in the distal direction
  • object moved mesially so it was buccal

Same lingual, opposite buccal

18
Q

What increases magnification?

A

THESE THINGS DECREASE MAGNIFICATION
- Source-to-object distance should be as long as possible.
Rule #2.
- Object-to-receptor distance should be as short as possible.

19
Q

What increases distortion?

A

THESE THINGS MINIMIZE DISTORTION
Rule #1:
- Object and receptor should be parallel.
Rule #2:
- Beam should be perpendicular to object and receptor

20
Q

Know the magnification and sharpness rule

A

THESE THINGS IMPROVE SHARPNESS
Rule #1.
- Radiation source should be as small as possible.
Rule #2.
- Source-to-object distance should be as long as possible.
Rule #3.
- Object-to-receptor distance should be as short as possible.

THESE THINGS DECREASE MAGNIFICATION
- Source-to-object distance should be as long as possible.
- Object-to-receptor distance should be as short as possible.

21
Q

According to FDA 2012, what x-rays to take for low caries risk patient?

A

Bitewings

22
Q

According to FDA 2012, what xrays to take for new patient?

A

individualized radiographic exam

23
Q

Indirect effect of radiation exposure to oral cavity?

A

radiation caries

24
Q

Best way to reduce radiation exposure to a patient?

A

increase receptor speed

25
Q

For x-radiation, absorbed dose is ________ equivalent dose

A

equal to

26
Q

A patient got cancer but her kids don’t have it. What type of radiation effect is this?

A

somatic effect

27
Q

For radiation higher than x-radiation the absorbed dose is _________ to equivalent dose

A

lower

28
Q

Give an example of background radiation

A

cosmic

29
Q

Which of these leads to shape distortion?

A

none of the above

30
Q

What leads to biological damage?

A

photoelectric effect

31
Q

Hemopoetic death is caused by…

A

sepsis

32
Q

Dental front office worker has a maximum permissible dose of…

A

50 mSV
5.0 Rem

33
Q

During pregnancy, when are x-rays taken?

A

Diagnosing acute painful problems

34
Q

What does penumbra mean?

A

sharpness/fuzziness

35
Q

What does lowering the kVP do?

A

increases contrast and decreases density

36
Q

Know how to maximize sharpness and minimize magnification and distortion

A

MAXIMIZE SHARPNESS
Rule #1.
- Radiation source should be as small as possible.
Rule #2.
- Source-to-object distance should be as long as possible.
Rule #3.
- Object-to-receptor distance should be as short as possible.

MINIMIZE MAGNIFICATION
- Source-to-object distance should be as long as possible.
- Object-to-receptor distance should be as short as possible.

37
Q

Definition of effective dose?

A

specifically calculates risks of radiation to human tissues on a common scale
- modified by tissue weight factor

38
Q

Definition of absorbed dose

A

energy absorbed by tissue

39
Q

Overlapping contacts picture shows…

A

incorrect horizontal angulation
- mesial to distal

Radiology (35 decks)

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