brake book questions Flashcards

1
Q

In what year were x-rays discovered?

A

1895

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2
Q

In what year were some of the biologically damaging effects of x-rays discovered?

A

1901

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3
Q

X-rays were discovered in experiments dealing with electricity and

A

vacuum tubes

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4
Q

X-rays were discovered when they caused a barium platinocyanide-coated plate to

A

fluoresce

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5
Q

X-radiation is part of which spectrum?

A

radiation

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6
Q

X-rays have a dual nature, which means that they behave like both

A

waves and particles

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7
Q

The wavelength and frequency of x-rays are related

A

inversely

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8
Q

X-rays have what electrical charge

A

no

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9
Q

X-rays have what mass?

A

no mass

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10
Q

the x-ray beam used in diagnostic radiography can be described as being

A

polyenergetic

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11
Q

Which x-ray tube Component serves as a source of electrons for x-ray production?

A

filament

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12
Q

Electrons interact with the _______to produce x-rays and heat.

A

target

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13
Q

The cloud of electrons that form before x-ray production is referred to as

A

space charge

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14
Q

the burning or boiling off of electrons at the cathode is referred to as

A

thermionic emission

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15
Q

Which primary exposure factor influences both the quantity and the quality of x-ray photons?

A

kVP

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16
Q

The unit used to express tube current is

17
Q

What percentage of the kinetic energy is converted to heat when moving electrons strike the anode target?

18
Q

The intensity of the x-ray beam is greater on the

A

cathode side of the tube

19
Q

According to the line focus principle, as the target angle decreases, the

A

effective focal spot size decreases

20
Q

__________ extends x-rays tube life

A

Warming up the tube after 2 hours of nouse

21
Q

Which type of target interaction is responsible for most of the x-rays in the diagnostic beam?

A

Bremsstrahlung interaction

22
Q

How much mAs is produced when the radiographer sets 70kVp, 600mA, and 50ms?

23
Q

Increasing the kVp results in

A

x-rays with higher energy

more x-rays

24
Q

Total filtration in the x-ray beam includes

A

inherent filtration

added filtration

25
The process whereby the radiographic image is created by variations in absorption and transmission of the exiting x-ray beam is known as
differential absorption
26
Which of the following process occur during the x-ray beam interaction with tissue?
absorption photon transmission scattering
27
The ability of an x-ray photon to remove an atom's electron is a characteristic known as
ionization
28
The x-ray interaction responsible for absorption is
photoelectric
29
The x-ray interaction responsible for scattering is
compton
30
Remnant radiation is composed of which of the following?
transmitted radiation | scattered radiation
31
What interaction creates unwanted exposure to the image, known as fog?
compton
32
Which of the following factors would affect beam attenuation
tissue atomic number | beam quality
33
The low-density or high brightness areas on a radiographic image are created by
absorbed radiation
34
An anatomic part that transmits the incoming x-ray photon would create an area of _________ on the radiographic image
high density or low brightness
35
The process of creating a radiographic image by differential absorption varies for film-screen and digital imaging (true/false)
false
36
An attribute of a radiographic image that affects the visibility
contrast and density
37
A radiographic film image with many densities but little differences among them is said to have
low contrast
38
Which of the following would improve digital image quality?
large matrix and increased pixel density