Question 1

The formula for minification gain is:

Accepted Answer

A)   minification gain = input phosphor diameter / output phosphor diameter
B)   minification gain = input phosphor diameter² / output phosphor diameter²
C)   minification gain = output phosphor diameter / input phosphor diameter
D)   minification gain = output phosphor diameter² / input phosphor diameter²

Question 2

Which of the following has a rectangular field of view and a wider dynamic range?

Accepted Answer

A)   conventional image intensifier
B)   flat-panel detector in place of image intensifier
C)   there is no difference between the two

Question 3

Flat-panel detectors for fluoroscopic imaging can be the:

Accepted Answer

A)   amorphous silicon indirect capture type
B)   photostimulable phosphor plate type
C)   amorphous selenium direct capture type
D)   A and C

Question 4

A disadvantage of using magnification mode during fluoroscopy is:

Accepted Answer

A)   the image has less resolution
B)   the image brightness is inconsistent
C)   the patient receives additional dose
D)   none of the above

Question 5

Which of the following does not require any additional devices for spot filming during the fluoroscopic procedure?

Accepted Answer

A)   conventional image intensifier
B)   flat-panel detector in place of image intensifier
C)   there is no difference between the two

Question 6

The commercial fluoroscope was developed by:

Accepted Answer

A)   Rutherford
B)   Edison
C)   Newton
D)   Einstein

Question 7

The beam-splitting mirror is never used with fiberoptics.

Accepted Answer

A) True 
 B)False

Question 8

For detectors to produce high-quality fluoroscopic images,they must be able to:

Accepted Answer

A)   respond very quickly
B)   respond many times in a row
C)   have application-specific integrated circuits for noise reduction
D)   all of the above

Question 9

If a 30/23/15 cm image intensifier is operated in the 23-cm mode,the fluoroscopic image will be magnified by a factor of:

Accepted Answer

A)   1.3
B)   1.5
C)   1.7
D)   2

Question 10

When a CCD is exposed to light,it generates and briefly stores light energy.

Accepted Answer

A) True 
 B)False

Question 11

The _____________________is located very close to the output phosphor.

Accepted Answer

A)   input phosphor
B)   output phosphor
C)   photocathode
D)   accelerating anode

Question 12

Which of the following has more spatial distortion?

Accepted Answer

A)   video camera
B)   CCD
C)   there is no difference between the two

Question 13

As the camera's electron beam moves across the target,the electric signal that is produced and goes to the television monitor maintains a constant level to produce a quality image.

Accepted Answer

A) True 
 B)False

Question 14

A large fill factor refers to:

Accepted Answer

A)   the entire detector being filled with x-rays
B)   the entire detector needing a large amount of x-rays to produce an image
C)   a large area of the pixel being sensitive to x-rays
D)   a small area of the pixel being sensitive to x-rays

Question 15

Semiconductor capacitors are components of the:

Accepted Answer

A)   camera tube
B)   CCD
C)   image intensifier
D)   x-ray tube

Question 16

In reference to image intensification,the function that adjusts and maintains the overall image density and contrast during the fluoroscopic procedure is:

Accepted Answer

A)   DQE
B)   APR
C)   ABC
D)   AEC

Question 17

Which of the following produces an image with more noise?

Accepted Answer

A)   video camera
B)   CCD
C)   there is no difference between the two

Question 18

In fluoroscopy,shape distortion is caused by:

Accepted Answer

A)   angling the tube
B)   angling the image intensifier
C)   the curved shape of the photocathode
D)   the flat shape of the output phosphor

Question 19

The original fluoroscopic image was very:

Accepted Answer

A)   dim
B)   bright
C)   clear
D)   fuzzy

Question 20

The newest fluoroscopy systems use a flat-panel detector:

Accepted Answer

A)   to record the spot images during fluoroscopy
B)   to record the overhead images following fluoroscopy
C)   in place of the image intensifier
D)   in addition to the image intensifier

Exam 14: Image Intensified Fluoroscopy

In fluoroscopy,shape distortion is caused by:

Correct AnswerverifiedShow Answer

Which of the following has more spatial distortion?

Correct AnswerverifiedShow Answer

For detectors to produce high-quality fluoroscopic images,they must be able to:

Correct AnswerverifiedShow Answer

A disadvantage of using magnification mode during fluoroscopy is:

Correct AnswerverifiedShow Answer

Which of the following does not require any additional devices for spot filming during the fluoroscopic procedure?

Correct AnswerverifiedShow Answer

The original fluoroscopic image was very:

Correct AnswerverifiedShow Answer

The newest fluoroscopy systems use a flat-panel detector:

Correct AnswerverifiedShow Answer

Which of the following produces an image with more noise?

Correct AnswerverifiedShow Answer

A large fill factor refers to:

Correct AnswerverifiedShow Answer

The formula for minification gain is:

Correct AnswerverifiedShow Answer

Which of the following has a rectangular field of view and a wider dynamic range?

Correct AnswerverifiedShow Answer

Flat-panel detectors for fluoroscopic imaging can be the:

Correct AnswerverifiedShow Answer

If a 30/23/15 cm image intensifier is operated in the 23-cm mode,the fluoroscopic image will be magnified by a factor of:

Correct AnswerverifiedShow Answer

As the camera's electron beam moves across the target,the electric signal that is produced and goes to the television monitor maintains a constant level to produce a quality image.

Correct AnswerverifiedShow Answer

The commercial fluoroscope was developed by:

Correct AnswerverifiedShow Answer

When a CCD is exposed to light,it generates and briefly stores light energy.

Correct AnswerverifiedShow Answer

Semiconductor capacitors are components of the:

Correct AnswerverifiedShow Answer

The beam-splitting mirror is never used with fiberoptics.

Correct AnswerverifiedShow Answer

In reference to image intensification,the function that adjusts and maintains the overall image density and contrast during the fluoroscopic procedure is:

Correct AnswerverifiedShow Answer

The _____________________is located very close to the output phosphor.

Correct AnswerverifiedShow Answer

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