X-ray production and ionising radiation Flashcards

1
Q

Tungsten chemical symbol?

A

W

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2
Q

Ionising radiation

A

Radiation is capable of producing ions by removing an electron(s) from an atom

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3
Q

What is radiation?

A

Emission and propagation of energy in the form of a wave or particles

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4
Q

Can you turn radiation on and off?

A

Yes

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5
Q

What odour are long wavelength?

A

Orange/red

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6
Q

What colour are the short wavelengths?

A

Blue

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7
Q

Does radiation travel in a. Straight line?

A

Yes

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8
Q

Are x-rays ionising?

A

Yes

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9
Q

Cathode

A

Negative

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10
Q

Anode

A

Positive

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11
Q

What way do electrons travel in x-ray tube?

A

Cathode to anode

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12
Q

On the anode, what ion is here?

A

Tungesten

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13
Q

What moves the electron from anode to cathode?

A

Potential difference

At very high speed

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14
Q

Heat s generated, where does the heat go?

A

Dissipated by copper bar and surrounding oil

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15
Q

How much of the energy is x-ray?

A

1%

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16
Q

Where can the incoming electron hit the tungesten atom?

A

Deselect or collide

17
Q

Typical periapical exposure?

A

70kV
7mA
0.125 seconds

18
Q

Do you get characteristic radiation at 70kV?

A

No

19
Q

Factors affecting intensity/quality of beam?

A

Tube voltage kV
Tube current mA
Distance from target d
Time of exposure ms
Filtration
Target material
Tube voltage waveform

20
Q

What determines the quality of the x-ray beam?

A

The energy carried by the x-ray