Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Rad Tech School 2024 - 2026 > Imaging Chap6 > Flashcards

Imaging Chap6 Flashcards

(101 cards)

Start Studying
1
Q

What are the four primary exposure technique factors?

A

kVp, mAs, distance, and filtration

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

What does kVp stand for in exposure technique factors?

A

kilovoltage peak

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

What does mAs stand for in exposure technique factors?

A

milliampere seconds

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

What is the purpose of using distance as an exposure technique factor?

A

To reduce patient dose by increasing the distance from the x-ray tube

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

How does filtration affect the quality of an x-ray image?

A

Filtration removes low-energy x-ray photons, resulting in a higher quality image

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

True or False: Increasing kVp will increase the penetration of the x-ray beam.

A

True

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

Fill in the blank: Increasing the _________ will decrease patient dose.

A

distance

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

Which exposure technique factor directly controls the amount of x-ray photons produced?

A

mAs

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

What is the relationship between mAs and image brightness?

A

Directly proportional

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

Why is it important to consider exposure technique factors when performing x-ray imaging?

A

To optimize image quality while minimizing patient dose

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

Radiation quantity is directly proportional to _____?

A

Milliamperage (mA)

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

If mA is increased, exposure time must:

A

Decrease

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

When kVp is increased, x-ray beam penetration ___

A

Increases

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

When kVp is decreased, subject contrast _________

A

Increases

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

What is the main reason to use a compensating filter?

A

To create an uniform exposure across varying tissue thickness

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

Using a high kVp and low mAs technique is recommended in digital imaging to

A

Prevent patient overexposure

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

What is the term for the overall blackness of a radiograph?

A

Density

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

_____ affects image brightness in digital radiography.

A

Post-processing

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

Increasing the focal spot size, _____ spatial resolution?

A

Decreases

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

______ is most responsible for image unsharpness

A

Focal spot size

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

The inverse square law states that the intensity of radiation is inversely proportional to:

A

The square of the distance from the source

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

If the SID is doubled, the intensity of the radiation reaching the image receptor ________.

A

Decreases by 1/4

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

_______ causes magnification

A

Increasing OID

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

_______ is used to adjust for changes iin SID while maintaining exposure to the IR

A

Direct square law

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
The main purpose of using a grid is to :
Reduce scatter
26
When is a grid used?
When the part is greater than 10 cm thick
27
Increasing collimation does what to scatter?
It decreases scatter
28
If an x-ray is taken using a 6:1 grid with 30 mA. What mAs would be needed if a 12:1 grid is used?
50 mAs
29
To compensate for increased collimation, the radiographer should:
Increase mAs
30
A hypersthenic patient will require __________ as compared to a sthenic patient
Increased kVp
31
How should the technique be adjusted for a wet plaster cast?
Increase the mAs by a factor of 3
32
How should the kVp be adjusted when imaging a pediatric patient under 6 years old?
Decrease the kVp by 15%
33
What is an example of an additive disease requiring an increase in kVp?
Pleural effusion
34
______ contrast agents increase the absorption of x-rays.
Positive
35
The 15% rule states that increasing the kVp by 15% is equivalent to:
Doubling the mAs
36
The air gap technique:
Reduces scatter
37
Increasing OID, ______ spatial resolution
Decreases
38
If the central ray is misaligned, what type of distortion will occur?
Shape distortion
39
What is the result of underexposure?
Quantum mottle
40
What happens to the exposure to the image receptor is the mAs is doubled?
It doubles
41
To reduce quantum noise, what should the radiographer do?
Increase mAs
42
_______ has the greatest affect on beam quality
KVp
43
Increasing mAs, ______ image contrast
Does not change
44
When adjusting technical factors for an asthenic patient, the radiographer should:
Decrease mAs
45
What is one condition that requires a decrease in kVp for proper exposure?
Osteoporosis
46
In the case of AEC, what determines the exposure time?
The detectors ability to measure radiation
47
What is the most important factor to control when trying to minimize motion blur?
Exposure time
48
The exposure indicator number on the digital image is used to determine:
The level of exposure received by the image receptor
49
When SID increases, spatial resolution ________
Increases
50
Decreasing SID, will _____
Increase magnification
51
The 15% rule is used to :
Maintain exposure while adjusting kVp
52
What is penumbra?
Unsharpness
53
The inverse square law affects ____
Density and intensity of the beam
54
What is the purpose of using a grid?
To reduce scatter and improve contrast
55
What effect does increasing grid ratio have on image contrast?
It increases contrast
56
If an x-ray is too light and needs more density, what adjustment should be made?
Increase the mAs
57
If an x-ray is too light and needs more density, what adjustment should be made?
Increase the mAs
58
What is the purpose of collimation?
To reduce scatter and improve contrast
59
What is a condition that would require a decrease in technical factors?
Emphysema
60
What is the appropriate technical factor adjustment for imaging a patient with a wet plaster cast?
Increase the mAs by 3
61
In pediatric imaging, what is the perferred method to reduce motion blur?
Using fast exposure times
62
How should exposure factors be adjusted for a patient with osteoporosis?
Decrease kVp
63
A radiograph of the abdomen shows a large amount of gas, which appears radiolucent. What adjustment should be made in technique?
Decrease kVp
64
A pediatric skull radiograph requires the same exposure factors as an adult starting at what age?
Six years
65
What should the radiographer do if an anatomic part has additive pathology such as edema?
Increase mAs
66
Tube filtration primarily affects which aspect of the x-ray beam?
Beam quality
67
In a high-frequency generator, how are exposure technique settings adjusted compared to a single-phase generator?
Decrease exposure factors
68
What effect does tube filtration have on patient dose?
Decreases pt dose
69
What is the purpose of compensating filtration?
To provide uniform exposure to areas with varying tissue thickness
70
As tissue thickness increases, beam attenuation ______
Increases
71
What effet does adding compensating filtration have on mAs
It increases mAs
72
Generators with higher efficiency, such as three-phase or high-frequency generators, typically require:
Lower exxposure factors
73
Increasing tube filtration results in:
Hardening of the beam
74
When using a single-phase generator, compared to a high-frequency generator, what adjustment should be made to exposure factors?
You should increase them
75
Why is tube filtration an important consideration in reducing patient dose?
It reduces low-energy photons that would be absorbed by the patient
76
. For a patient with severe emphysema, what change in technical factors is typically required?
Decrease kVp
77
When imaging a patient with a dry plaster cast, what adjustment should be made to the exposure technique?
Increase mAs by a factor of 2
78
For a patient with a large amount of ascites, which adjustment in technique is needed?
Increase mAs
79
How should the radiographer adjust the exposure technique for a patient with a pneumothorax
No change
80
When imaging a patient with pleural effusion, what adjustment should be made to the technique?
Increase kvp
81
Which pathological condition requires an increase in mAs to compensate for tissue attenuation?
Edema
82
What is the appropriate adjustment when imaging a patient with a destructive pathology such as advanced emphysema?
Decrease kvp
83
Increasing OID, _______ image magnification
Increases
84
What adjustment should be made to maintain exposure when SID is increased?
Increase mAs
85
Decreasing OID will increase _______
Spatial resolution
86
To maintain exposure to the image receptor when increasing OID, what must be done to mAs?
Increase mAs
87
In the event of excessive quantum noise in an image, what adjustment should be made?
Increase mAs
88
Increasing SID, does what to beam intensity?
Decreases it
89
To maintain exposure when kVp is increased by 15%, what should be done to mAs?
Decrease the mAs by half
90
Using a small focal spot size , _______ spatial resolution
Increases
91
Which of the following is a key consideration when imaging pediatric patients compared to adults?
Lowering kvp and mas is crucial
92
A pediatric skull radiograph requires a 15% decrease in kVp for children under the age of:
6 years
93
When imaging a child with a wet plaster cast, how should exposure factors be adjusted?
Increase mAs by a factor of 3
94
When imaging a pediatric chest x-ray, what is the recommended approach to reduce patient dose?
Using the lowest mAs possible for an adequate image
95
What should be considered when imaging a pediatric patient with scoliosis?
Using compensating filters
96
When using a higher grid ratio, what adjustment should be made to mAs to maintain image brightness?
It should be increased
97
Increasing kVp, _______ image contrast
Increases
98
When contrast media is used, what happens to the overall image contrast?
It increases
99
What is the effect of collimation on patient dose and image contrast?
Decreases patient dose and increases contrast
100
What adjustment should be made when imaging a body part with a destructive pathology like osteoporosis?
Decrease kVp
101
For a patient with a body part requiring positive contrast agents, how should technical factors be adjusted?
Kvp should be increased

Rad Tech School 2024 - 2026 (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions