Brainscape's Knowledge GenomeTM

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


See full index

Imaging > Safety & Intro > Flashcards

Safety & Intro Flashcards

1
Q

The particle of an atom that has an negative charge is the:

A

Electron

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

What are some of the physical properties of X-rays?

A
  • damages tissue
  • variable wavelengths
  • causes some substances to fluoresce
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

X-rays are defined as a form of _____________ radiation.

A

Electromagnetic

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

As the wavelength of X-ray photons shorten, the energy of the X-ray beam will:

A

Increase

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

The ratio of hear generated from an X-ray is:

A

99%:1%

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

The primary source of radiation

A

The patient

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

What thing on the X-ray machine limits the size of the primary beam ad reduces secondary exposure?

A

Collimator

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

Because of the heel effect, a technician would need to:

A

Place the thickest part of the patient toward the cathode side of the X-ray tube

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

The workplace program that ensures radiation exposures are low as possible:

A

ALARA

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

Minimum age for a person to take X-rays

A

18 years

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

Minimum led thickness requirement for protective gloves/aprons :

A

0.5mm

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

A grid with a ratio of 10:1 absorbs:

A

More scatter and requires greater exposure factors than a 5:1

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

KVP controls the ________ of the X-ray machine

A

Quality

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

The mAs controls the ______ of the X-ray machine

A

Quantity

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

The transformer that controls the temp of the filament

A

Step-down transformer

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

Exposure factor that accelerates the electrons from the cathode to the anode:

A

KVP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Controls the temp of the cathode filament:

A

mA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is Sante’s rule?

A

[2xthickness(cm)] + 40

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

If you change SID, you must also change:

A

mAs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

The acceleration of the electrons and their ultimate striking energy is determined by the :

A

Kilovoltage (KVP)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Minimum distance in feet for a safelight to be away from the work site in the dark room

A

4 feet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

If using blue/green sensitive films, you should also use a ____ safety light.

A

Red

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Main purpose of X-ray developer:

A

Convert the exposed silver halide crystals into black metallic silver.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Main purpose of fixer

A

Clear away unexposed, undeveloped silver halide crystals.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Maximum intensity of safelight bulb

A

15 watts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

To get more density on film you should ______ KVP and _______ mAs.

A

Increase kVp, do nothing to mAs because it doesn’t affect density

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Rare-earth screens are sensitive to:

A

Green range of light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

A radiograph is dark, bones are grey, what should you do?

A

Decrease KVP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

The pH of the fixer chemicals is:

A

Acidic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Ideal temp for the chemicals in manual radio graphic process:

A

68 degrees F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

How should you store films?

A

Away from chemicals and sources of ionizing radiation , 10 - 15 degrees C, and have a humidity of 40-60%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Non screen film is often used for X-rays of the ________.

A

Teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

An X-ray exposed to light and developed appear:

A

Black

34
Q

An x ray developed before exposure to radiation appears:

A

White

35
Q

A new X-ray taken directly from the box is:

A

Clear

36
Q

Things about fast films:

A
  • large silver crystals
  • has grainier image, less definition
  • less latitude in exposure factors
37
Q

If radiograph is too light and image is under penetrated you should:

A

Increase KVP 10-15%

38
Q

If radiograph is too dark and has adequate penetration you should:

A

Decrease mAs 30-50%

39
Q

If film is too dark and Is over penetrated you should:

A

Decrease KVP 10-15%

40
Q

You should decrease mAs by 50% if a dog is :

A

Neonatal

41
Q

mAs should be increased by 50% if your takin a X-ray of a :

A

Animal with ascites

42
Q

When can you take a tabletop X-ray?

A

When area of interest is 10cm thick

43
Q

X-ray film cassettes have what kind of screens inside them that glow when irradiated?

A

Intensifying screens

44
Q

What can you do to minimize X-ray radiation the most?

A

Narrow the collimator

45
Q

When radiographing a distal extremity, a _______ scale of contrast is best.

A

Short

46
Q

When you double the mAs, you _______ the intensity.

A

Double

47
Q

What is a latent image?

A

Image on the film before exposure

48
Q

What’s the proper order for manual processing of an X-ray

A

Develop, rinse, fix, wash, dry

49
Q

What light sensitive chemical is in the X-ray film?

A

Silver halide crystals

50
Q

What is non screen X-ray film most sensitive to?

A

X-ray radiation

51
Q

What type of X-ray film produces greatest detail?

A

Low speed

52
Q

What X-ray film has greatest latitude, without change in density?

A

Slow

53
Q

What’s an advantage to using screen X-ray film over non screen film?

A

Requires shorter exposure times

54
Q

A cloud of negative ______ radiation forms at the _______ side of the X-ray tube when the _______ is heated.

A

Electron, cathode, filament.

55
Q

The filament is made of ________ and housed in the ___________ ____, which directs electrons towards the anode side of the X-ray tube.

A

Tungsten
Focusing cup
Anode

56
Q

X-ray are produced when fast moving ___________ collide with matter, which is achieved when they hit the ________ of the target.

A

Electrons

Anode

57
Q

Density is the degree of __________ on the radiograph.

A

Blackness

58
Q

Electromagnetic waves behave as a __________ as well as a ______.

A

Partical as well as a wave.

59
Q

Stationary anode is found in a ________ machine.

A

Mobile

60
Q

Which type of anode produces a clearer image?

A

Rotating anode

61
Q

High contrast radiographs are also known as ______ ______ and are needed for _______ studies.

A

Short scale

Bone

62
Q

What does SID stand for? What’s the standard?

A

Source imaging distance

Standard = 40in

63
Q

What is the device that is used to measure the area of interest? Are animals measured in cm or in?

A

The caliper, measured in cm.

64
Q

2 factors that affect density of film.

A

Number of X-rays that reach the film
Developing time
Penetrating power

65
Q

What’s a grid? Where is it located?

A

A device that absorbs scatter radiation. Located in Bucky tray.

66
Q

What’s a dosimeter? What’s the most common one?

A

A device that calculates the amount of radiation that is absorbed by a person. Most common is dosimeter badge. [clip on you, near the neck]

67
Q

What PPE’s do you wear every time you take a x ray?

A

Gloves, led apron, and thyroid shield.

68
Q

3 methods of reducing exposure

A

Reduce retakes
Rotate the people who restraint
Only the people helping stay in room

69
Q

Under exposed , too light

A

Increase KVP or mAs

70
Q

Overexposed , too dark

A

Decrease KVP or mAs

71
Q

X-rays have adequate penetration

A

Change mAs by 30-50%

72
Q

X-rays inadequately penetrated

A

Change KVP by 10-15%

73
Q

Low contrast is for

A

Soft tissue studies

74
Q

What are the types of grids?

A

Parallel
Focused
Pseudo focused
Crisscross

75
Q

What does MPD stand for?

A

Maximum permissible dose

76
Q

What does ALARA stand for?

A

As low as reasonable achievable

77
Q

Cells most sensitive to radiation:

A

Growth cells,
Cancer cells,
Reproductive cells.

78
Q

Most common effects of excessive radiation are:

A

Somatic and genetic radiation

79
Q

MPD of someone in a occupational job

A

0.05 sv/year

80
Q

MPD for non-occupational job

A

0.005 sv/year

Imaging (8 decks)

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