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Radiology > Imporant Info 2.4 pt 2 > Flashcards

Imporant Info 2.4 pt 2 Flashcards

1
Q

Cause of indirect radiation?

A

Caries

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2
Q

ID

A

coronoid process

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3
Q

ID

A

nasal septum

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4
Q

ID

A

anterior nasal spine

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5
Q

ID

A

soft tissue of nose —> terrible picture

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6
Q

ID the radiolucent area

A

Submandibular gland

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7
Q

ID the radiolucent area

A

mental foramen

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8
Q

ID

A

Floor of Maxillary Sinus

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9
Q

ID

A

Zygomatic process of the maxilla

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10
Q

ID

A

radiopacity: lingual foramen or genial tubercle??

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11
Q

ID

A

External Oblique Ridge

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12
Q

ID

A

Floor of Nasal Cavity

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13
Q

ID

A

Mental fossa

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14
Q

ID

A

Lateral cross-sectional of mandible

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15
Q

ID

A

Lateral cephalometic

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16
Q

What is true regarding NOMAD?

A

Wear dosimeter badge for every use, even if on a mission trip

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17
Q

What tissue is most likely to get deterministic effect?

A

Lens (bc he talked about cataracts)

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18
Q

What can come from Stochastic?

A

Leukemia & skin cancer

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19
Q

For anterior occlusal, topographical have _________ posterior view and ________ vertical angle

A

Less and Less

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20
Q

This is when tooth is not parallel to receptor, and beam is directed perpendicular to tooth

A

Tooth will appear longer

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21
Q

Lady gets cancer, is not passed down to kids. What type of effect?

A

Somatic

22
Q

What’s in the x-ray tube?

A

Filament

23
Q

Most lethal form of acute radiation?

A

CNS/cardiovascular

24
Q

Compares biological effects of different types of radiation?

A

Equivalent

25
Q

Compares techniques of radiation on biological tissues

A

Effective

26
Q

Short answer: List 1 advantage of direct current

A
  • Decrease radiation exposure to pt
  • Lower dose bc higher beam mean intensity
  • higher mean energy
  • allows all energy to be used???
27
Q

Which part of the sensor has the scintillator?

A

Green part - D

28
Q

Picture of a ruler

A

Mathematical measurement of pixels

29
Q

When to take BW’s for recall adult pt with low caries risk

A

24-36 months

30
Q

Short answer about purpose of high voltage filament

A

Increase the energy of the electrons

31
Q

Define ionization

A

Must have equal to or more than the electrons binding energy

32
Q

Best example of ionization

A

Atom loses an electron

33
Q

Decreased penumbra =

A

Increased sharpness

34
Q

Causes the most bioloigcal harm

A

Put phoelectric, but would be compton IF it was an answer choice

35
Q

Photoelectric effect:

A

Hits INNER electrons

36
Q

What is true about Stochastic?

A

Probability of occurrence depends on dose

37
Q

What is the probability of occurrence directly depends on the dose is?

A

Stochastic

38
Q

ALARA

A

Reduce as much as possible

39
Q

What is the amount of energy that a person can safely receive without significant increase to risk of disease?

A

Maximum permissible dose

40
Q

What is the latent period?

A

Time between exposure and symptoms appear

41
Q

What effects dose most:

A

High oxygen and young patient

42
Q

What reduces dose output?

A

rectangular collimator

43
Q

Picture of edge enhancement, what modification?

A

Sharpening

44
Q

Another picture of edge enhancement, what modification was made

A

Sharpening

45
Q

Reduce dose:

A

Rectangular collimator and long length

46
Q

Inverse square law if you double it FITB

A

1/4

47
Q

When do we treat pregant pt

A

Emergency pain

48
Q

For extraoral imaging what is a problem

A

Secondary photons resulting in image degradation??

2 degree scatter???

49
Q

Pt w no clinical caries but high risk

A
50
Q

ADA 2012 recommends what NP x rays

A

Bitewings and specific PAs after exam

51
Q

What does filtration do?

A

Remove low energy

52
Q

What is the thrift of radiation?

A

Direct current and long tube

Radiology (36 decks)

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