Radiation Biology 3

Question 1

Hyperdontia/multiple teeth is most common in the _____ teeth area

Answer 1

Premolar

Question 2

As Low as Reasonably Achievable
Guiding Principle of Radiation Protection
Since the probability or severity of biological damage increases as the radiation dose increases, it is desirable to avoid receiving even the smallest dose of radiation unnecessarily.

Answer 2

ALARA

Question 3

• Selective passage of contents through a specified substance
• Selectively removes a greater proportion of low keV x-ray photons
• Increases mean energy of the beam

Answer 3

Filtration

Question 4

For an x-ray tubehead that operates with 50-70 kV, what size aluminum filter is used?

Answer 4

1.5mm

Question 5

What is the maximum diameter for the exit size of the xray beam from the collimator?

Answer 5

2.75 “

Question 6

If distance between xray tube to the object increases, how is the image quality affected?

Answer 6

Greater image quality

Question 7

If distance between xray tube to the object increases, how is the radiation dose?

Answer 7

Decreased radiation dose

Question 8

T/F: NEVER Stand in the primary beam

Answer 8

True

Question 9

How far away should the operator be from the patient and radiation source?

Answer 9

6 feet

Question 10

At what position should the operator stand from the patient during radiation exposure?

Answer 10

90-135 degrees

Question 11

T/F: NEVER Hold film or other receptors in a patient’s mouth

Answer 11

True