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Radphy 2 > Xray Emission Spectrum > Flashcards

Xray Emission Spectrum Flashcards

0
Q

Only specific values

A

Discrete spectrum

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1
Q

Range of values of any quantity

A

Spectrum

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2
Q

All posible values

A

Continuous spectrum

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3
Q

Range of energies and form a continuous emission spectrum

A

Bremsstralung xrays

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4
Q

Precisely fixed energy amd form the discrete emossion spectrum

A

Charateristic xrays

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5
Q

Adding up the total number of xrays over the entire spectrum

A

Integration

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6
Q

Charaterized by quantity and quality

A

Xray beam

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7
Q

Intensity of the xray beam

A

Xray quantity

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8
Q

Intensity is measured in

A

Roentgens

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9
Q

Measure of number of ion pairs produced in air

A

Roentgen

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10
Q

Factors affecting xray quantity

A

mA or mAs

kVp

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11
Q

A ____ increase in kVp is equivalent to doubling the mAs

A

15%

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12
Q

Reduce the number of low energy xrays

A

Filtration

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13
Q

Produce the lowest voltage ripple

A

High frequency generator

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14
Q

Regular variation in a direct current voltage

A

Voltage ripple

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15
Q

The ability of xrays to penetrate deeper in tissue

A

Penetrabity

16
Q

Penetrability of the xtay beam

A

Xray quality

17
Q

Process of removing low energy xrays

A

Filtration

18
Q

Ideally filtered xray beam is

A

Monoenergenic

19
Q 
For filter , \_\_ is chosen because of its
Efficient removing through photoelectric effect
Readily available 
Inexpesive
Easily shaped
A

Aluminum

20
Q

Refers to the glass/ metal enclosure of an xray tube

A

Inherent filtration

21
Q

Inherent filtration is approximately

A

0.5 mm Al

22
Q

With aging tube , the filtration

A

Increases

23
Q

Refers to a thin sheet of aluminum positioned between the protective housing and xray beam collimator

A

Added filtration

24
Q

Total filtration is

A

2.5 mm Al

25
Q

Ionization of air ________

No of xrays in the beam _______

A

Increases

Increases

26
Q

Exposure rate is expressed in

A

mR/s, mR/min, mR/mAs

Radphy 2 (8 decks)

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