Question 1

The high-frequency generator used in CT scanning has minimal voltage ripple,allowing:

Accepted Answer

A)  higher kVp to be used 
B)  higher mA to be used 
C)  longer exposures 
D)  more consistent energy x-ray photons 
A)  higher kVp to be used 
B)  higher mA to be used 
C)  longer exposures 
D)  more consistent energy x-ray photons

Question 2

The CT gantry houses the:

Accepted Answer

A)  x-ray tube 
B)  detector array 
C)  collimators 
D)  all of the above 
A)  x-ray tube 
B)  detector array 
C)  collimators 
D)  all of the above

Question 3

This advancement has the tube rotating inside the gantry while the patient and table move through the gantry in a continuous motion.

Accepted Answer

A)  spiral CT 
B)  multislice CT 
C)  slip-ring technology 
D)  cone beam 
A)  spiral CT 
B)  multislice CT 
C)  slip-ring technology 
D)  cone beam

Question 4

The result of changing window level and width of the CT image is that the image data has been permanently changed.

Accepted Answer

A) True 
 B)False

Question 5

This collimator is located between the tube and the patient.

Accepted Answer

A)  prepatient collimator 
B)  predetector collimator 
C)  A and B 
D)  none of the above 
A)  prepatient collimator 
B)  predetector collimator 
C)  A and B 
D)  none of the above

Question 6

As the WL changes,the CT image's:

Accepted Answer

A)  contrast changes 
B)  brightness changes 
C)  spatial resolution changes 
D)  none of the above 
A)  contrast changes 
B)  brightness changes 
C)  spatial resolution changes 
D)  none of the above

Question 7

A pitch of 0.5 indicates that with each rotation of the tube:

Accepted Answer

A)  the table is moving farther than the slice thickness 
B)  the table is moving less than the slice thickness 
C)  the table is moving the same distance as the slice thickness 
D)  none of the above 
A)  the table is moving farther than the slice thickness 
B)  the table is moving less than the slice thickness 
C)  the table is moving the same distance as the slice thickness 
D)  none of the above

Question 8

The area of anatomy seen on the monitor is the:

Accepted Answer

A)  protocol 
B)  SFOV 
C)  DFOV 
D)  pitch 
A)  protocol 
B)  SFOV 
C)  DFOV 
D)  pitch

Question 9

Linear attenuation coefficient is symbolized by the Greek letter mu,which looks like:

Accepted Answer

A)  µ 
B)  b 
C)  g 
D)  y 
A)  µ 
B)  b 
C)  g 
D)  y

Question 10

The DAS is located:

Accepted Answer

A)  just below the couch 
B)  inside the x-ray tube 
C)  within the gantry 
D)  none of the above 
A)  just below the couch 
B)  inside the x-ray tube 
C)  within the gantry 
D)  none of the above

Question 11

This CT scanner took approximately 5 minutes to produce a single image.

Accepted Answer

A)  first generation 
B)  second generation 
C)  third generation 
D)  fourth generation 
A)  first generation 
B)  second generation 
C)  third generation 
D)  fourth generation

Question 12

The raw data is the:

Accepted Answer

A)  measure of the radiation detected 
B)  measure of the primary radiation 
C)  digitized linear attenuation coefficient values 
D)  none of the above 
A)  measure of the radiation detected 
B)  measure of the primary radiation 
C)  digitized linear attenuation coefficient values 
D)  none of the above

Question 13

The CT gantry is stationary and cannot be tilted.

Accepted Answer

A) True 
 B)False

Question 14

Metal in the area being imaged produces a:

Accepted Answer

A)  streak artifact 
B)  ring artifact 
C)  partial-volume artifact 
D)  beam-hardening artifact 
A)  streak artifact 
B)  ring artifact 
C)  partial-volume artifact 
D)  beam-hardening artifact

Question 15

Overlapping slices occur with a:

Accepted Answer

A)  pitch of 0 
B)  pitch of 0.5 
C)  pitch of 1 
D)  pitch of 2 
A)  pitch of 0 
B)  pitch of 0.5 
C)  pitch of 1 
D)  pitch of 2

Question 16

The major development for the first three generations of CT scanners was the reduction in patient exposure.

Accepted Answer

A) True 
 B)False

Question 17

The snapshot of all the transmission measurements at a specific location is the:

Accepted Answer

A)  view 
B)  ray 
C)  profile 
D)  all of the above 
A)  view 
B)  ray 
C)  profile 
D)  all of the above

Question 18

To visualize tissues that are very similar to each other,the:

Accepted Answer

A)  WW should be narrow 
B)  WW should be wide 
C)  WL should be low 
D)  WL should be high 
A)  WW should be narrow 
B)  WW should be wide 
C)  WL should be low 
D)  WL should be high

Question 19

This specific area of the image is often selected to perform data analysis.

Accepted Answer

A)  annotation 
B)  windowing 
C)  ROI 
D)  MPR 
A)  annotation 
B)  windowing 
C)  ROI 
D)  MPR

Question 20

Spiral scanning collects data for:

Accepted Answer

A)  one slice at a time 
B)  5-10 slices at a time 
C)  the entire volume of tissue being imaged 
D)  none of the above 
A)  one slice at a time 
B)  5-10 slices at a time 
C)  the entire volume of tissue being imaged 
D)  none of the above

The high-frequency generator used in CT scanning has minimal voltage ripple,allowing:

The CT gantry houses the:

This advancement has the tube rotating inside the gantry while the patient and table move through the gantry in a continuous motion.

The result of changing window level and width of the CT image is that the image data has been permanently changed.

This collimator is located between the tube and the patient.

As the WL changes,the CT image's:

A pitch of 0.5 indicates that with each rotation of the tube:

The area of anatomy seen on the monitor is the:

Linear attenuation coefficient is symbolized by the Greek letter mu,which looks like:

The DAS is located:

This CT scanner took approximately 5 minutes to produce a single image.

The raw data is the:

The CT gantry is stationary and cannot be tilted.

Metal in the area being imaged produces a:

Overlapping slices occur with a:

The major development for the first three generations of CT scanners was the reduction in patient exposure.

The snapshot of all the transmission measurements at a specific location is the:

To visualize tissues that are very similar to each other,the:

This specific area of the image is often selected to perform data analysis.

Spiral scanning collects data for:

Introduction to the Imaging Sciences

Structure of the Atom

Electromagnetic and Particulate Radiation

X-Ray Circuit

The X-Ray Tube

X-Ray Production

X-Ray Interactions With Matter

Image Production

Image Characteristics

Radiographic Exposure Technique

Scatter Control

Image Receptors

Automatic Exposure Control

Image Intensified Fluoroscopy

Additional Equipment

Filters

Exam 16: Computed Tomography

The high-frequency generator used in CT scanning has minimal voltage ripple,allowing:

The CT gantry houses the:

This advancement has the tube rotating inside the gantry while the patient and table move through the gantry in a continuous motion.

The result of changing window level and width of the CT image is that the image data has been permanently changed.

This collimator is located between the tube and the patient.

As the WL changes,the CT image's:

A pitch of 0.5 indicates that with each rotation of the tube:

The area of anatomy seen on the monitor is the:

Linear attenuation coefficient is symbolized by the Greek letter mu,which looks like:

The DAS is located:

This CT scanner took approximately 5 minutes to produce a single image.

The raw data is the:

The CT gantry is stationary and cannot be tilted.

Metal in the area being imaged produces a:

Overlapping slices occur with a:

The major development for the first three generations of CT scanners was the reduction in patient exposure.

The snapshot of all the transmission measurements at a specific location is the:

To visualize tissues that are very similar to each other,the:

This specific area of the image is often selected to perform data analysis.

Spiral scanning collects data for:

Introduction to the Imaging Sciences

Structure of the Atom

Electromagnetic and Particulate Radiation

X-Ray Circuit

The X-Ray Tube

X-Ray Production

X-Ray Interactions With Matter

Image Production

Image Characteristics

Radiographic Exposure Technique

Scatter Control

Image Receptors

Automatic Exposure Control

Image Intensified Fluoroscopy

Additional Equipment

Filters