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Radiology > Important Info 2.3 > Flashcards

Important Info 2.3 Flashcards

1
Q

List 2 examples of inherent filtration

A

a. Glass envelope
b. Insulating/immersion oil
c. Tube window
d. Metal housing

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2
Q

What occurs when you have a low kV?

A

High contrast (short gray scale)

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3
Q

Inverse Square law question. If you double it, what happens?

A

Intensity of the beam is 1/4 the original

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4
Q

By using adjustment tools such as “Edge enhancer”, can you stimulate illnesses and abnormalities to show that are not actually there?

A

Yes

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5
Q

Too much information on computer can cause

A

Not function properly

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6
Q

Which of the following has the most biological effects?

A

a. Indirect (⅔)

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7
Q

Which of the following factors modify effects of X-radiation?

A

a. Increased oxygen content
b. Pediatric patients

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8
Q

What stage of acute radiation syndrome is non-lethal?

A

Prodromal period

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9
Q

What is the most lethal stage of acute radiation syndrome?

A

CNS and cardiovascular syndrome

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10
Q

What is the effect of radiation on teeth?

A

Radiation caries

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11
Q

What kind of radiation causes radiation caries?

A

Indirect

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12
Q

What are the occupational limits?

A

5 rem or 50 mSv

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13
Q

What are the pregnancy occupational limits?

A

0.5 rem or 500 eREM

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14
Q

What kind of X-rays do you take on a pregnant patient?

A

Only take x-rays during emergency circumstances

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15
Q

What are examples of background radiation?

A

Radon

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16
Q

(Select all that applies) What cancer has the highest risk for dental radiograph exposure?

A

a. Leukemia
b. Thyroid

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17
Q

Where should you stand when taking an x-ray?

A

Behind barrier, 6 feet away, 90-135 degree from beam

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18
Q

(Shows picture of a Water’s skull) What is the primary reason for taking this kind of image?

A

See the maxillary sinus

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19
Q

According to the SLOB rule, when you move the tube head mesially, and the object also moves
mesially, where is it located?

A

Lingual

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20
Q

(Fill in the blank) What comprises the Inverted Y?

A

a. Nasal fossa
b. Maxillary sinus

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21
Q

Do you need to wear a lead apron?

A

No ← he said recent evidence shows that it is useless

22
Q

Which of the following provides the best protection against radiation?

A

Lead thyroid collar ← only answer the made sense

23
Q

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

A

Foreshortening

24
Q

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

A

Elongation

25
Q

If you shorten Source-to-receptor, what happens?
a. Increase sharpness
b. Decrease magnification
c. Decrease sharpness
d. Increase magnification
e. Both A and C
f. Both C and D

A

f. Both C and D

26
Q

What ionization has the most effect?
a. Compton scattering
b. Photoelectric
c. Coherent
d. No interaction

A

a. Compton scattering

27
Q

A lady has colon cancer and thus had radiation treatment. However, her 2 children are at increased risk. This affected _____

A

Germ cells

28
Q

What is the most lethal part of hematopoietic syndrome?

A

Sepsis

29
Q

The effect is only seen in the person affected, NOT future generations

A

Somatic

30
Q

By federal law, a signal and light are required on every x-ray unit

A

True

31
Q

How many Gy is needed for treatment of lymphoma?

A

20-40 Gy

-solid tumors: 60-80 Gy
-intraoral cancer 50 Gy

32
Q

Operating Kv is <50, what size filtration do you need?

A

0.5mm

33
Q

Full time X-ray operator needs to have what on their person at all times?

A

Dosimeter

34
Q

In X-radiation, absorbed dose is _______ to equivalent dose
a. Equal
b. Less
c. More

A

a. Equal

35
Q

In X-radiation, the absorbed dose is ______ to the effective dose
a. Equal
b. Less
c. More

A

b. Less

36
Q

If you increase mA, what occurs?

A

Increased density

37
Q

Alpha particles have ________ charge and a _______ LET then a proton

A

Larger; larger

38
Q

This reduces the amount of scatter radiation exposing film

A

Grid

39
Q
A

standard maxillary cross-sectional occlusal radiograph

40
Q
A

frontal sinus

41
Q
A

anterior border of ramus

  • in our slides as the external oblique ridge
42
Q
A

mental ridge

43
Q
A

internal oblique ridge

44
Q
A

mental foramen

45
Q
A

mental fossa

46
Q
A

nasolacrimal canal

47
Q
A

floor of the maxillary sinus

48
Q
A

soft tissue of the nose

49
Q
A

zygomatic process of the maxilla

50
Q
A

maxillary tuberosities

51
Q
A

pterygoid plate

Radiology (35 decks)

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