Question 1

Recorded detail is

Accepted Answer

A)  the degree of geometric sharpness.
B)  definition.
C)  the accuracy of the structural lines actually recorded in the radiographic image.
D)  all of the above

Question 2

Resolution is improved when

Accepted Answer

A)  OID increases.
B)  SID increases.
C)  SID decreases.
D)  the receptor is angled.

Question 3

Resolution is improved when

Accepted Answer

A)  OID increases.
B)  OID decreases.
C)  SID decreases.
D)  the x-ray tube is angled B

Question 4

Which radiograph exhibits the best detail?

Accepted Answer

A)  a PA chest radiograph for evaluation of the heart at 40 in.
B)  a PA chest radiograph for evaluation of the heart at 72 in.
C)  an AP chest radiograph for evaluation of the heart at 40 in.
D)  an AP chest radiograph for evaluation of the heart at 72 in.

Question 5

When evaluating the degree of resolution on an actual radiograhic image, an effective tissue to analyze is

Accepted Answer

A)  heart size.
B)  bony trabecular pattern.
C)  kidney.
D)  patient body fat stripes.

Question 6

For general radiography, an MTF value of 1 is

Accepted Answer

A)  average.
B)  suboptimum.
C)  theoretically impossible.
D)  a function of mAs.

Question 7

You have completed a chest radiograph on a 2-month-old infant using a restraining device at a 72" SID.Because of the design of the device, your OID is suboptimum.The image reveals good resolution of the bony anatomy but the pulmonary vasculature is blurred.The EI value is 2040.In an effort to improve the quality of the repeat image, the competent radiographer would

Accepted Answer

A)  raise the mA and decrease the exposure time.
B)  decrease the SID and maintain the same mAs.
C)  switch to small focal spot.
D)  ask for mild sedation of the infant to decease respiration.

Question 8

Spatial resolution in digital imaging is determined by the

Accepted Answer

A)  bit depth.
B)  matrix size.
C)  pixel size.
D)  all of the above

Question 9

Calculate the penumbra for an image taken with a 2.0 mm focal spot, at a 72 in.distance, and OID of 6 in.

Accepted Answer

The answer of Calculate the penumbra for an image taken...

Question 10

Calculate the penumbra for an image taken with a 2.0 mm focal spot, at a 40 in.distance, and OID of 2 in.

Accepted Answer

The answer of Calculate the penumbra for an image taken...

Question 11

When the sampling frequency is less than the Nyquist value,

Accepted Answer

A)  aliasing is eliminated.
B)  the Moire effect can occur.
C)  patient dose must increase.
D)  the Nyquist value must be altered.

Question 12

Match the following choices with respect to recorded detail.
-results from insufficient mAs

Accepted Answer

A)  PSF
B)  quantum noise
C)  resolution increase
D)  MTF
E)  MFF) LSFG) aliasingH) loss of visibility of detail

Question 13

A digital detector with a high fill factor

Accepted Answer

A)  will produce poor resolution.
B)  will require longer processing time.
C)  will produce high resolution.
D)  is undesirable.

Question 14

Factors affecting recorded detail include

Accepted Answer

A)  kVp.
B)  radiographic grids.
C)  mAs.
D)  focal spot size.

Question 15

The Nyquist frequency is

Accepted Answer

A)  important in analog imaging.
B)  sampling a minimum of twice per cycle.
C)  unique to radiography.
D)  related to involuntary motion. B

Question 16

The ____ represents a depth to the information in the digital image.

Accepted Answer

A)  z axis
B)  y-x grid matrix
C)  y axis
D)  x-y grid matrix

Question 17

All of the following affect visibility of detail EXCEPT

Accepted Answer

A)  15% rule.
B)  filtration.
C)  radiographic grids.
D)  SID. D

Question 18

Calculate the penumbra for an image taken with a 1.0 mm focal spot, at a 40 in.distance, and OID of 2 in.

Accepted Answer

The answer of Calculate the penumbra for an image taken...

Question 19

As focal spot size decreases,

Accepted Answer

A)  umbra is improved.
B)  penumbra decreases.
C)  resolution increases.
D)  all of the above

Question 20

In general radiography, quantum noise is

Accepted Answer

A)  filtered out of images.
B)  a function of mAs and kVp.
C)  designed into the receptor specifications.
D)  a recorded detail parameter.

Exam 28: Recorded Detail

Recorded detail is

Correct Answer
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Resolution is improved when

Correct Answer
verified

Resolution is improved when

Correct Answer
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B

Which radiograph exhibits the best detail?

Correct Answer
verified

When evaluating the degree of resolution on an actual radiograhic image, an effective tissue to analyze is

Correct Answer
verified

For general radiography, an MTF value of 1 is

Correct Answer
verified

Correct Answer
verified

Spatial resolution in digital imaging is determined by the

Correct Answer
verified

Calculate the penumbra for an image taken with a 2.0 mm focal spot, at a 72 in.distance, and OID of 6 in.

Correct Answer
verified

Calculate the penumbra for an image taken with a 2.0 mm focal spot, at a 40 in.distance, and OID of 2 in.

Correct Answer
verified

When the sampling frequency is less than the Nyquist value,

Correct Answer
verified

Match the following choices with respect to recorded detail. -results from insufficient mAs

Correct Answer
verified

A digital detector with a high fill factor

Correct Answer
verified

Factors affecting recorded detail include

Correct Answer
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The Nyquist frequency is

Correct Answer
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B

The ____ represents a depth to the information in the digital image.

Correct Answer
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All of the following affect visibility of detail EXCEPT

Correct Answer
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D

Calculate the penumbra for an image taken with a 1.0 mm focal spot, at a 40 in.distance, and OID of 2 in.

Correct Answer
verified

As focal spot size decreases,

Correct Answer
verified

In general radiography, quantum noise is

Correct Answer
verified

Exam 28: Recorded Detail

Recorded detail is

Correct AnswerverifiedShow Answer

Resolution is improved when

Correct AnswerverifiedShow Answer

Resolution is improved when

Correct AnswerverifiedB

Which radiograph exhibits the best detail?

Correct AnswerverifiedShow Answer

When evaluating the degree of resolution on an actual radiograhic image, an effective tissue to analyze is

Correct AnswerverifiedShow Answer

For general radiography, an MTF value of 1 is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Spatial resolution in digital imaging is determined by the

Correct AnswerverifiedShow Answer

Calculate the penumbra for an image taken with a 2.0 mm focal spot, at a 72 in.distance, and OID of 6 in.

Correct AnswerverifiedShow Answer

Calculate the penumbra for an image taken with a 2.0 mm focal spot, at a 40 in.distance, and OID of 2 in.

Correct AnswerverifiedShow Answer

When the sampling frequency is less than the Nyquist value,

Correct AnswerverifiedShow Answer

Match the following choices with respect to recorded detail. -results from insufficient mAs

Correct AnswerverifiedShow Answer

A digital detector with a high fill factor

Correct AnswerverifiedShow Answer

Factors affecting recorded detail include

Correct AnswerverifiedShow Answer

The Nyquist frequency is

Correct AnswerverifiedB

The ____ represents a depth to the information in the digital image.

Correct AnswerverifiedShow Answer

All of the following affect visibility of detail EXCEPT

Correct AnswerverifiedD

Calculate the penumbra for an image taken with a 1.0 mm focal spot, at a 40 in.distance, and OID of 2 in.

Correct AnswerverifiedShow Answer

As focal spot size decreases,

Correct AnswerverifiedShow Answer

In general radiography, quantum noise is

Correct AnswerverifiedShow Answer

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B

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B

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D

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