Ch. 7 X-Ray Production Flashcards Preview

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Flashcards in Ch. 7 X-Ray Production Deck (20)
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1

Almost all of the kinetic energy of the incident electrons is converted to:

Heat.

2

What percentage of target interaction results in the production of x-ray photons?

1%

3

The transfer of the incident electrons' kinetic energy to the outer-shell electrons causing vibration of the outer-shell electron results in the emission of:

Infrared radiation

4

The types of target interaction that occur in the production of x-ray photons in the diagnostic range are dependent upon the:

Incident electron kinetic energy

5

The energy of a Bremsstrahlung photon is:

The difference between the entering and exiting kinetic energy of the incoming electron.

6

Bremsstrahlung interactions may occur only when the incident electron interacts with:

The force field around the nucleus

7

Characteristic interactions may occur only when the incident electron interacts with:

An inner-shell electron

8

During a characteristic interaction, the kinetic energy of the incident electron must be ___ the electron it knocks from its orbit.

Greater than that of

9

During a characteristic interaction, the dropping of a higher-energy state electron into a lower-energy state "hole" results in the emission of:

A photon of electromagnetic energy

10

The energy of a characteristic photon is:

The difference between the binding energy of the outer and inner shells between which the electron dropped.

11

At the end of the characteristic cascade, the ____ shell is missing an electron.

Outermost

12

The K shell can hold a maximum of ___ electrons.

2

13

If the peak kVp is 110, the average keV energy of the beam would be:

33-44 keV

14

X-rays are characterized as:

-Electromagnetic waves of short wavelength
-Electromagnetic waves with high frequencies

15

The emission spectrum of an x-ray beam from a tungsten anode consists of:

-A characteristic spike at 69 keV
-A significant portion due to Bremsstrahlung interactions
-A mixture of brems and characteristic interactions

16

If Uranium were used to produce x-radiation, rather than tungsten,
-The k-shell binding energy would be _____ than with tungsten.
-The _____ of brems production would be ____.
-The _____ of characteristic photons would be ____ than with tungsten.

-The k-shell binding energy would be GREATER than with tungsten.
-The INTENSITY of brems production would be GREATER.
-The ENERGY of characteristic photons would be GREATER than with tungsten

17

Electrons traveling from the cathode filament to the anode are called __________

Incident electrons

18

When comparing the x-ray emission spectrum between beams produced at 70 kVp and 110 kVp,

The 110 kVp beam would demonstrate more brems and a higher characteristic spike.

19

For the element molybdenum, the effective energy of characteristic interactions it:

18 keV.

20

When the x-ray emission spectra between single and three phase generators are compared,

Three phase beams would have a higher average energy