Ways of Controlling Exposure (7) Flashcards

1
Q

Three basic ways of controlling exposure to harmful radiation

A
  • Time
  • Distance
  • Shielding
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2
Q

Controlling Exposure - Time

A

Less time you spend near a radiation source the less radiation you are exposed to.

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3
Q

Controlling Exposure - Distance

A

The farther you stand from the radiation source, the less radiation you are exposed to.

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4
Q

Controlling Exposure - Shielding

A

Any shielding between you and the source of radiation, reduces your exposure.

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5
Q

What is a Collimator?

A

Made of tungsten or lead used to partially surround the source to absorb radiation not being directed to an object being radiographed.
- Most practical use of shielding for radiography

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6
Q

Define Half-Value-Layer

A

thickness of a shielding material required to reduce the original radiation intensity to 1/2 the original

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7
Q

Define Tenth-Value-Layer

A

Thickness of a shielding material required to reduce the original radiation intensity to 1/10 the original

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8
Q

Shielding Materials

A
  • Depleted Uranium
  • Concrete blocks
  • Lead sheets
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