Question 1

As you analyze your image, you come to the conclusion that it must have more exposure.As a general rule, you should increase
A)kVp.
B)mAs by 2x.
C)the SID.
D)mAs by a 0.5 multiplier.

Accepted Answer

Increasing mAs by 2x effectively doubles the amount of radiation, which increases the exposure of the image.

Question 2

The anode heel effect is more pronounced with A)smaller field sizes (8"x10"). B)stationary anodes. C)a 10^-degree target angle. D)rotating anodes.

Accepted Answer

A smaller target angle increases the anode heel effect because it causes a greater variation in x-ray intensity across the field.

Question 3

Because of the "heel effect," x-ray beam intensity
A)is greater under the cathode side of the tube.
B)is greater under the anode side of the tube.
C)is equal across the beam long axis.
D)changes with patient position.

Accepted Answer

The "heel effect" refers to the phenomenon in x-ray imaging where the intensity of the x-ray beam is greater on the cathode side of the tube. This occurs because the x-rays are more easily absorbed or scattered as they pass through the thicker part of the anode, resulting in a decrease in intensity towards the anode side.

Question 4

Match the following items with the appropriate statement as each relates to image receptor exposure.
-increasing kVp from 85 to 98 kVp
A)mAs
B)kVp
C)density maintenance formula
D)radiographic grids
E)15% rule
F)anode heel effect
G)focal spot size
H)recorded detail
I)EI value
J)visibility of detail

Accepted Answer

The 15% rule states that increasing the kVp by 15% will double the exposure to the image receptor, similar to doubling the mAs. This rule is relevant when adjusting kVp levels, such as increasing from 85 to 98 kVp, to maintain appropriate exposure.

Question 5

All of the following will increase radiographic film density EXCEPT
A)increased developer temperature.
B)increased dryer temperature.
C)increased immersion time in developer.
D)increased developer concentration.

Accepted Answer

Increased dryer temperature can actually decrease film density because it may cause the emulsion to shrink and become less sensitive to light. On the other hand, all of the other options listed (increased developer temperature, immersion time in developer, and developer concentration) can increase film density by causing more silver ions to be reduced and deposited onto the film.

Question 6

Match the following items with the appropriate statement as each relates to image receptor exposure.
-variation in beam intensity along the long axis of beam
A)mAs
B)kVp
C)density maintenance formula
D)radiographic grids
E)15% rule
F)anode heel effect
G)focal spot size
H)recorded detail
I)EI value
J)visibility of detail

Accepted Answer

The anode heel effect refers to the variation in beam intensity along the long axis of the beam, where radiation intensity is greater on the cathode side compared to the anode side due to the geometry of the angled anode surface.

Question 7

Focal spot blooming occurs with
A)high kVps.
B)high mAs.
C)large SIDs.
D)extreme tube angulation.

Accepted Answer

Focal spot blooming occurs when a high amount of electrons are forced onto a small focal spot for an extended period of time, causing the electrons to scatter and create a larger effective focal spot size. This can happen with high mAs settings, but not necessarily with high kVps or large SIDs. Extreme tube angulation may have other effects on image quality, but it is not directly related to focal spot blooming.

Question 8

Match the following items with the appropriate statement as each relates to image receptor exposure.
-require an increase in mAs as ratio increases
A)mAs
B)kVp
C)density maintenance formula
D)radiographic grids
E)15% rule
F)anode heel effect
G)focal spot size
H)recorded detail
I)EI value
J)visibility of detail

Accepted Answer

Radiographic grids require an increase in mAs as the grid ratio increases to maintain proper image receptor exposure. This is because grids are used to reduce scatter radiation, which can improve image contrast but also absorb more of the primary beam, necessitating an increase in mAs to compensate for the loss of exposure.

Question 9

Optimum exposure to an IR is
A)1 mR plus or minus 33%.
B)10 mR plus or minus 33%.
C)1 mR plus or minus 3%.
D)10 mR plus or minus 15%.

Accepted Answer

Optimum exposure to an IR is 1 mR plus or minus 33%.

Question 10

The greatest factor in the production of scatter radiation is
A)kVp.
B)mAs.
C)patient thickness.
D)patient position.

Accepted Answer

Patient thickness is the greatest factor in the production of scatter radiation. The thicker the patient, the more scatter radiation will be produced.

Question 11

Match the following items with the appropriate statement as each relates to image receptor exposure.
-small and large
A)mAs
B)kVp
C)density maintenance formula
D)radiographic grids
E)15% rule
F)anode heel effect
G)focal spot size
H)recorded detail
I)EI value
J)visibility of detail

Accepted Answer

The answer of Match the following items with the appropriate...

Question 12

Match the following items with the appropriate statement as each relates to image receptor exposure.
-controls x-ray beam quantity
A)mAs
B)kVp
C)density maintenance formula
D)radiographic grids
E)15% rule
F)anode heel effect
G)focal spot size
H)recorded detail
I)EI value
J)visibility of detail

Accepted Answer

mAs controls the quantity of x-ray photons reaching the image receptor.

Answer: B
 kVp controls the quality and penetration of the x-ray beam, ultimately affecting image receptor exposure.

Answer: C
 Density maintenance formula is used to adjust exposure factors to maintain consistent image receptor density despite changes in subject thickness or density.

Answer: D
 Radiographic grids are used to reduce scatter radiation and improve image receptor exposure in anatomical regions with increased scatter.

Answer: E
 The 15% rule is used to determine the optimal kVp setting based on the selected mAs and subject thickness.

Answer: F
 Anode heel effect describes the drop in x-ray intensity at the anode end of the x-ray beam. Exposure may need to be adjusted to account for this effect in certain anatomical regions.

Answer: G
 Focal spot size affects image receptor exposure and recorded detail. A smaller focal spot generally provides better recorded detail but requires a higher exposure.

Answer: H
 Recorded detail is affected by a variety of factors, including motion, focal spot size, and image receptor exposure.

Answer: I
 EI (exposure index) values are used to evaluate image receptor exposure in digital radiography systems.

Answer: J
 Visibility of detail is affected by a variety of factors, including image receptor exposure, contrast, and recorded detail.

Question 13

A change in kVp, as an exposure factor, affects
A)average beam energy.
B)beam intensity.
C)the amount of scatter production.
D)all of the above

Accepted Answer

A change in kVp affects all of the above factors. Increasing kVp results in an increase in the average beam energy, which can affect image contrast and penetration. Also, it increases the beam intensity which affects the amount of radiation hitting the receptor. Additionally, increasing kVp corresponds to an increase in scatter production, which can affect image quality.

Question 14

When changing your SID from 72" to 56"
A)decrease your kVp by 15%.
B)decrease your mAs by 50%.
C)increase the mAs by a factor of 4.
D)all of the above

Accepted Answer

When changing the SID from 72" to 56", the intensity of the x-ray beam at the patient will increase. To account for this, the mAs should be decreased by 50% to maintain the same patient dose. There is no need to adjust the kVp with this change in SID. Increasing the mAs by a factor of 4 or decreasing the kVp by 15% would not be appropriate adjustments in this situation.

Question 15

If 60 kVp, 100 mA, and 0.25 sec.produce a satisfactory radiograph, what mAs was used?

Accepted Answer

The answer of If 60 kVp, 100 mA, and 0.25...

Question 16

Match the following items with the appropriate statement as each relates to image receptor exposure.
-controls the average energy of the x-ray beam
A)mAs
B)kVp
C)density maintenance formula
D)radiographic grids
E)15% rule
F)anode heel effect
G)focal spot size
H)recorded detail
I)EI value
J)visibility of detail

Accepted Answer

kVp controls the average energy of the x-ray beam and affects image receptor exposure.

Answer: A
 mAs directly controls image receptor exposure.

Answer: C
 The density maintenance formula is a mathematical equation used to determine the amount of exposure necessary to maintain image receptor density when making changes to technique factors.

Answer: D
 Radiographic grids are used to reduce scatter radiation and improve image quality, but also require an increase in technique factors to maintain image receptor exposure.

Answer: E
 The 15% rule is a guideline used to determine the necessary adjustment of kVp when changing mAs to maintain image receptor exposure.

Answer: F
 The anode heel effect is a variation in radiation intensity across the x-ray field due to the angle of the x-ray beam and the geometry of the anode.

Answer: G
 Focal spot size indirectly affects image receptor exposure by affecting recorded detail and spatial resolution.

Answer: H
 Recorded detail is the ability to distinguish small objects in the image, which is affected by factors such as focal spot size and motion blur.

Answer: I
 EI value (Exposure Index) is a standardized value used to indicate image receptor exposure and ensure consistent image quality across different imaging systems.

Answer: J
 Visibility of detail is the ability to distinguish different shades of gray in the image, which is affected by factors such as image receptor exposure, contrast, and noise.

Question 17

Match the following items with the appropriate statement as each relates to image receptor exposure.
-direct relationship between mAs and distance
A)mAs
B)kVp
C)density maintenance formula
D)radiographic grids
E)15% rule
F)anode heel effect
G)focal spot size
H)recorded detail
I)EI value
J)visibility of detail

Accepted Answer

The density maintenance formula, also known as the inverse square law, describes the direct relationship between mAs and distance. It is used to adjust mAs when the distance between the x-ray tube and the image receptor changes to maintain the same exposure level on the image receptor.

Question 18

Radiographic room A is a three-phase, 6-pulse generator.Room B is a high frequency generator.When going between these two rooms to perform examinations, what exposure modification is necessary to produce comparable exposure density?
A)Use 15% more with the three-phase system.
B)Use 10% more with the high frequency system.
C)No change is required between the two systems.
D)Use 10% less with the high frequency system.

Accepted Answer

High frequency generators are more efficient than three-phase systems, allowing for shorter exposure times and lower patient dose for the same radiographic density. However, when comparing the output of a high frequency generator to a three-phase, 6-pulse generator, the difference in efficiency is already accounted for in the design and calibration of the systems. Therefore, no change in exposure settings is typically necessary to produce comparable exposure density between these two types of systems.

Question 19

Match the following items with the appropriate statement as each relates to image receptor exposure.
-affected by photographic properties of image
A)mAs
B)kVp
C)density maintenance formula
D)radiographic grids
E)15% rule
F)anode heel effect
G)focal spot size
H)recorded detail
I)EI value
J)visibility of detail

Accepted Answer

The answer of Match the following items with the appropriate...

Question 20

If 80 kVp, 400 mA, and 0.025 sec.produce a satisfactory radiograph, what mAs was used?

Accepted Answer

The answer of If 80 kVp, 400 mA, and 0.025...

Quiz 26: Densityir Exposure

As you analyze your image, you come to the conclusion that it must have more exposure.As a general rule, you should increase

The anode heel effect is more pronounced with

Because of the "heel effect," x-ray beam intensity

Match the following items with the appropriate statement as each relates to image receptor exposure. -increasing kVp from 85 to 98 kVp

All of the following will increase radiographic film density EXCEPT

Match the following items with the appropriate statement as each relates to image receptor exposure. -variation in beam intensity along the long axis of beam

Focal spot blooming occurs with

Match the following items with the appropriate statement as each relates to image receptor exposure. -require an increase in mAs as ratio increases

Optimum exposure to an IR is

The greatest factor in the production of scatter radiation is

Match the following items with the appropriate statement as each relates to image receptor exposure. -small and large

Match the following items with the appropriate statement as each relates to image receptor exposure. -controls x-ray beam quantity

A change in kVp, as an exposure factor, affects

When changing your SID from 72" to 56"

If 60 kVp, 100 mA, and 0.25 sec.produce a satisfactory radiograph, what mAs was used?

Match the following items with the appropriate statement as each relates to image receptor exposure. -controls the average energy of the x-ray beam

Match the following items with the appropriate statement as each relates to image receptor exposure. -direct relationship between mAs and distance

Radiographic room A is a three-phase, 6-pulse generator.Room B is a high frequency generator.When going between these two rooms to perform examinations, what exposure modification is necessary to produce comparable exposure density?

Match the following items with the appropriate statement as each relates to image receptor exposure. -affected by photographic properties of image

If 80 kVp, 400 mA, and 0.025 sec.produce a satisfactory radiograph, what mAs was used?