Question 1

In MSCT, the slice thickness is not determined by which factor?

Accepted Answer

A)   Volume coverage
B)   Beam width in the z-axis
C)   Pitch
D)   Shape and width of the reconstruction filter

Question 2

The CT detector consists of each of these components except:

Accepted Answer

A)   radiation sensor.
B)   photodiodes.
C)   analog to digital converter (AD
C)  .
D)   high-frequency generator. A

Question 3

Which of the following is not a parameter of image quality?

Accepted Answer

A)   Spatial resolution
B)   Patient dose
C)   Contrast resolution
D)   Noise

Question 4

In an MSCT scanner, what type of algorithm can be used if the number of detector rows is small?

Accepted Answer

A)   Cone-beam reconstruction
B)   Fan-beam reconstruction
C)   x-axis reconstruction
D)   z-axis reconstruction

Question 5

Which of the following is not a physical property of detectors?

Accepted Answer

A)   High luminescence efficiency
B)   Large dynamic range
C)   Small afterglow
D)   Recyclable value

Question 6

Which method of CT scanning does interscan delay occurs?

Accepted Answer

A)   Single-slice CT (SSCT)  scanner
B)   Slice-by-slice CT scanner
C)   Volume CT scanner
D)   Multislice CT (MSCT)  scanner

Question 7

What is the term used to describe the flipped view used for interpolated reconstruction?

Accepted Answer

A)   Complementary data
B)   Opposed data
C)   Opposite data
D)   Reciprocal data

Question 8

New capabilities created as a result of the creation of spiral/helical CT include each of the following applications except:

Accepted Answer

A)   CT endoscopy.
B)   real-time CT fluoroscopy.
C)   stroke imaging.
D)   CT angiography.

Question 9

What year was the first computed tomography (CT)  scanner able to perform volume data acquisition introduced?

Accepted Answer

A)   1988
B)   1989
C)   1990
D)   1991

Question 10

An early pioneer in the development of the technique of volume rendering was Dr. Willi A. Kalender.

Accepted Answer

A) True 
 B)False  True

Question 11

The radiation sensors convert ___________ to ___________.

Accepted Answer

A)   light; X-ray photons
B)   X-ray photons; light
C)   light; electrical signals
D)   electric signals; light B

Question 12

A pitch greater than 1 will result in an increased dose.

Accepted Answer

A) True 
 B)False

Question 13

The computer systems of MSCT scanners have hardware that provides all of the following except:

Accepted Answer

A)   high-speed processing.
B)   image communication.
C)   image reconstruction.
D)   postprocessing operations.

Question 14

If the X-ray prepatient collimation width is 24 cm and the scanner has a four-row detector array, what is the detector row collimation?

Accepted Answer

A)   4 mm
B)   5 mm
C)   6 mm
D)   7 mm

Question 15

All the following are problems that can occur from data acquisition with spiral geometry except:

Accepted Answer

A)   localization of a particular slice is difficult.
B)   inconsistent projection data.
C)   increased patient dose.
D)   streak artifacts can occur.

Question 16

All of the following are requirements for volume scanning except:

Accepted Answer

A)   continuous couch movement.
B)   increased cooling capacity.
C)   slip-ring technology.
D)   tube memory.

Question 17

What term is used to describe the resorting of the 3D data collected from the cone-beam acquisition to a set of 2D fan-beam data?

Accepted Answer

A)   Binning
B)   Rebinning
C)   Reformatting
D)   Sampling

Question 18

All of these components are rotating parts of the spiral/helical CT scanner except the:

Accepted Answer

A)   X-ray tube.
B)   high-voltage generator.
C)   detectors.
D)   front-end memory.

Question 19

What is the ideal pitch in spiral/helical CT?

Accepted Answer

A)   1
B)   2
C)   3
D)   4

Question 20

The first step in volume scanning is analog to digital conversion.

Accepted Answer

A) True 
 B)False

Exam 11: Multislice Computed Tomography: Physical Principles and Instrumentation

In MSCT, the slice thickness is not determined by which factor?

Correct AnswerverifiedShow Answer

The CT detector consists of each of these components except:

Correct AnswerverifiedA

Which of the following is not a parameter of image quality?

Correct AnswerverifiedShow Answer

In an MSCT scanner, what type of algorithm can be used if the number of detector rows is small?

Correct AnswerverifiedShow Answer

Which of the following is not a physical property of detectors?

Correct AnswerverifiedShow Answer

Which method of CT scanning does interscan delay occurs?

Correct AnswerverifiedShow Answer

What is the term used to describe the flipped view used for interpolated reconstruction?

Correct AnswerverifiedShow Answer

New capabilities created as a result of the creation of spiral/helical CT include each of the following applications except:

Correct AnswerverifiedShow Answer

What year was the first computed tomography (CT) scanner able to perform volume data acquisition introduced?

Correct AnswerverifiedShow Answer

An early pioneer in the development of the technique of volume rendering was Dr. Willi A. Kalender.

Correct AnswerverifiedTrue

The radiation sensors convert ___________ to ___________.

Correct AnswerverifiedB

A pitch greater than 1 will result in an increased dose.

Correct AnswerverifiedShow Answer

The computer systems of MSCT scanners have hardware that provides all of the following except:

Correct AnswerverifiedShow Answer

If the X-ray prepatient collimation width is 24 cm and the scanner has a four-row detector array, what is the detector row collimation?

Correct AnswerverifiedShow Answer

All the following are problems that can occur from data acquisition with spiral geometry except:

Correct AnswerverifiedShow Answer

All of the following are requirements for volume scanning except:

Correct AnswerverifiedShow Answer

What term is used to describe the resorting of the 3D data collected from the cone-beam acquisition to a set of 2D fan-beam data?

Correct AnswerverifiedShow Answer

All of these components are rotating parts of the spiral/helical CT scanner except the:

Correct AnswerverifiedShow Answer

What is the ideal pitch in spiral/helical CT?

Correct AnswerverifiedShow Answer

The first step in volume scanning is analog to digital conversion.

Correct AnswerverifiedShow Answer

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A

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True

The radiation sensors convert _ to _.

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B

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