Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Mosby's Study > X-Ray Equipment Operation - Image Production > Flashcards

X-Ray Equipment Operation - Image Production Flashcards

1
Q

At what speed do x-rays travel?

A

The speed of light – 186,000 miles per second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The speed of x-rays is based on:

A

The fact that they form electromagnetic radiation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

As radiation strikes matter, how is energy transferred to the atoms?

A

According to the law of conversion of energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Electromagnetic induction is the process of causing an electrical current to flow in a conductor:

A

When it is placed in the magnetic field of another conductor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The strength of the magnetic fields in a transformer is increased by:

A

Coiling the wires and letting their magnetic fields overlap

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The electricity provided to the radiology department is:

A

60 Hz AC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The electricity provided to the radiology department operates at:

A

120 pulses per second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The primary advantage of three-phase power is that:

A

Voltage never drops to zero

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

A variable transformer that is used to select kVp for the x-ray circuit is the:

A

Autotransformer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What regulates the duration of x-ray production?

A

Timer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the source of bremsstrahlung and characteristic rays?

A

Anode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the most commonly used AEC?

A

Ionization chamber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What device always delivers the shortest exposure time possible?

A

Falling load generator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What device is turned by a rotor?

A

Anode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The filament is kept warm by:

A

A standby current from the time the x-ray machine is turned on.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

X-rays are produced as incident electrons are slowed going past the nuclei of target atoms by a process called:

A

Bremsstrahlung

17
Q

X-rays are produced as incident electrons collide with inner shell electrons in target atoms by a process called:

A

Characteristic

18
Q

What are the properties of x-ray?

A
  • Affect film emulsion
  • Scatter and produce secondary radiation
  • Invisible to the human eye
  • Travels in bundles of energy called photons
  • Can ionize matter and gases
  • Cause phosphors to fluoresce
19
Q

The x-ray emission spectrum consists of:

A

Discrete spectrum (produced by characteristic rays) and continuous spectrum (produced by brems rays)

20
Q

The primary purpose of filtration is:

A

Radiation protection

21
Q

The amount of material needed to reduce the intensity of the beam by 1/10 is called:

A

Tenth-Value Layer

22
Q

When a quality control test is performed to ensure that the penetrating ability of the x-ray beam is accurate, the result must be within what amount of the control panel setting?

A

50%

23
Q

The primary type of grid used in diagnostic imaging is:

A

Focused

24
Q

The portion of the image-intensifier tube that converts electron energy to visible light is the:

A

Output Phosphor

25
Q

The portion of the image intensifier tube that converts visible light to electrons is the:

A

Photocathode

26
Q

Single-phase, full-wave rectification produces:

A

Pulsating direct current with 120 pulses per second and 100% ripple

27
Q

Three-phase, 12-pulse full-wave rectification produces:

A

Direct current with 4% ripple

28
Q

The increase in average photon energy when using three-phase, 6-pulse equipment compared with single-phase equipment is:

A

35%

29
Q

The increase in average photon energy when using three-phase, 12-pulse equipment compared with single-phase equipment is:

A

41%

30
Q

An image intensifier’s conversion factor is expressed as the ratio of:

A

The luminance of the output phosphor to the exposure rate at the input phosphor

31
Q

Exposure linearity must be accurate to within:

A

10%

32
Q

Fluoroscopy exposure rate may not exceed:

A

100 mGy_a per minute

33
Q

The test that measures the accuracy of successive exposures is:

A

Exposure reproducibility

34
Q

The test that measures the accuracy of adjacent mA stations is:

A

Exposure linearity

35
Q

Resolution of the television system may be measured using the what tools?

A

Resolution test pattern

Mosby's Study (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions