Question 1

The greatest spatial resolution will be produced when the matrix is _____ and the pixels are _____.

Accepted Answer

A)  small; large 
B)  small; small 
C)  large; small 
D)  large; large 
A)  small; large 
B)  small; small 
C)  large; small 
D)  large; large

Question 2

The front of the imaging plate is made of:

Accepted Answer

A)  plastic. 
B)  carbon. 
C)  a radiolucent material that does not absorb x-rays. 
D)  a radiolucent material that absorbs x-rays. 
A)  plastic. 
B)  carbon. 
C)  a radiolucent material that does not absorb x-rays. 
D)  a radiolucent material that absorbs x-rays.

Question 3

The viewing monitor's active viewing area is called a:

Accepted Answer

A)  voxel. 
B)  pixel. 
C)  matrix. 
D)  window width. 
A)  voxel. 
B)  pixel. 
C)  matrix. 
D)  window width.

Question 4

The best quality radiographic image will be produced on the viewing monitor when there is _____ SNR,_____ noise.

Accepted Answer

A)  low; high 
B)  low; low 
C)  high; high 
D)  high; low 
A)  low; high 
B)  low; low 
C)  high; high 
D)  high; low

Question 5

"Noise" refers to the amount of information that is not useful in the radiographic image. This noise is referred to as:

Accepted Answer

A)  quantum mottle. 
B)  shuttering. 
C)  dynamic range. 
D)  signal-to-noise ratio (SNR). 
A)  quantum mottle. 
B)  shuttering. 
C)  dynamic range. 
D)  signal-to-noise ratio (SNR).

Question 6

What is the term for the calibration of an image display system that ensures that all radiographic images' gray scales are presented consistently?

Accepted Answer

A)  Postprocessing 
B)  Edge enhancement 
C)  Health level-7 
D)  DICOM gray-scale function 
A)  Postprocessing 
B)  Edge enhancement 
C)  Health level-7 
D)  DICOM gray-scale function

Question 7

Digital imaging processors replace which components in the x-ray department?
1) Darkroom
2) Film/screen cassettes
3) Generator

Accepted Answer

A)  1 and 2 
B)  1 and 3 
C)  2 and 3 
D)  1, 2, and 3 
A)  1 and 2 
B)  1 and 3 
C)  2 and 3 
D)  1, 2, and 3

Question 8

One of the main advantages of using CR and DR digital systems is:

Accepted Answer

A)  reduction in repeat exams. 
B)  lower dose to the patient. 
C)  ability to process images very fast. 
D)  ability to see greater resolution. 
A)  reduction in repeat exams. 
B)  lower dose to the patient. 
C)  ability to process images very fast. 
D)  ability to see greater resolution.

Question 9

How many times can the phosphor in the CR plate be used?

Accepted Answer

A)  1,200 times 
B)  5,000 times 
C)  8,000 times 
D)  10,000 times 
A)  1,200 times 
B)  5,000 times 
C)  8,000 times 
D)  10,000 times

Question 10

"Window width" controls which aspect of the radiographic image?

Accepted Answer

A)  Shuttering 
B)  Noise 
C)  Density 
D)  Contrast 
A)  Shuttering 
B)  Noise 
C)  Density 
D)  Contrast

Question 11

The artifact that will occur when the grid lines are not aligned with the CR reader's laser light is:

Accepted Answer

A)  quantum mottle. 
B)  Moire pattern. 
C)  ghost images. 
D)  light spots. 
A)  quantum mottle. 
B)  Moire pattern. 
C)  ghost images. 
D)  light spots.

Question 12

What is the name of the computer software function that allows separate radiographic images to be tied into one image for viewing?

Accepted Answer

A)  Shuttering 
B)  Image stitching 
C)  Window level 
D)  Window width 
A)  Shuttering 
B)  Image stitching 
C)  Window level 
D)  Window width

Question 13

Barium fluorohalide with europium is used:

Accepted Answer

A)  in the CR reader to erase the image. 
B)  in the CR reader to remove the image and process it. 
C)  as the phosphor that absorbs the x-ray energy in the imaging plate. 
D)  as the phosphor that absorbs the x-ray energy in the flat-panel detector. 
A)  in the CR reader to erase the image. 
B)  in the CR reader to remove the image and process it. 
C)  as the phosphor that absorbs the x-ray energy in the imaging plate. 
D)  as the phosphor that absorbs the x-ray energy in the flat-panel detector.

Question 14

What is the name of the computer software function that allows adjustment of the radiographic image after it has been processed?

Accepted Answer

A)  Image annotation 
B)  Postprocessing 
C)  Edge enhancement 
D)  DICOM gray-scale function 
A)  Image annotation 
B)  Postprocessing 
C)  Edge enhancement 
D)  DICOM gray-scale function

Question 15

The artifact that is caused by noise in the digital system's electronics,and creates lengthwise or crosswise lines,is called a(n):

Accepted Answer

A)  Moire pattern. 
B)  ghost image. 
C)  scratch or tear. 
D)  extraneous line pattern. 
A)  Moire pattern. 
B)  ghost image. 
C)  scratch or tear. 
D)  extraneous line pattern.

Question 16

When a CR plate is inserted into the reader for processing,the phosphor is scanned with a:

Accepted Answer

A)  green/blue light. 
B)  fluorescent light. 
C)  white light. 
D)  laser beam. 
A)  green/blue light. 
B)  fluorescent light. 
C)  white light. 
D)  laser beam.

Question 17

What is the size of the flat-panel detector inside the table of a DR system?

Accepted Answer

A)  10 × 12 in. 
B)  14 × 14 in. 
C)  14 × 17 in. 
D)  17 × 17 in. 
A)  10 × 12 in. 
B)  14 × 14 in. 
C)  14 × 17 in. 
D)  17 × 17 in.

Question 18

Which control on the viewing station can blacken the clear or white areas around the collimation edges of a radiograph?

Accepted Answer

A)  Shuttering 
B)  Image stitching 
C)  Window width 
D)  Window level 
A)  Shuttering 
B)  Image stitching 
C)  Window width 
D)  Window level

Question 19

Which of the following should be used when imaging body parts that have extreme differences in tissue thickness?

Accepted Answer

A)  Larger IR 
B)  Shorter SID 
C)  Larger focal spot 
D)  Compensating filter 
A)  Larger IR 
B)  Shorter SID 
C)  Larger focal spot 
D)  Compensating filter

Question 20

Which of the following is a true statement regarding the centering of the body part when using digital systems?

Accepted Answer

A)  The part must be placed off-center by about 2 cm. 
B)  The part must be placed in the center of the plate or detector. 
C)  The part should be placed near one of the four edges. 
D)  The part can be placed anywhere on the plate or detector. 
A)  The part must be placed off-center by about 2 cm. 
B)  The part must be placed in the center of the plate or detector. 
C)  The part should be placed near one of the four edges. 
D)  The part can be placed anywhere on the plate or detector.

Exam 8: Digital Image Receptor Systems

The greatest spatial resolution will be produced when the matrix is _____ and the pixels are _____.

The front of the imaging plate is made of:

The viewing monitor's active viewing area is called a:

The best quality radiographic image will be produced on the viewing monitor when there is _____ SNR,_____ noise.

"Noise" refers to the amount of information that is not useful in the radiographic image. This noise is referred to as:

What is the term for the calibration of an image display system that ensures that all radiographic images' gray scales are presented consistently?

Digital imaging processors replace which components in the x-ray department? 1) Darkroom 2) Film/screen cassettes 3) Generator

One of the main advantages of using CR and DR digital systems is:

How many times can the phosphor in the CR plate be used?

"Window width" controls which aspect of the radiographic image?

The artifact that will occur when the grid lines are not aligned with the CR reader's laser light is:

What is the name of the computer software function that allows separate radiographic images to be tied into one image for viewing?

Barium fluorohalide with europium is used:

What is the name of the computer software function that allows adjustment of the radiographic image after it has been processed?

The artifact that is caused by noise in the digital system's electronics,and creates lengthwise or crosswise lines,is called a(n):

When a CR plate is inserted into the reader for processing,the phosphor is scanned with a:

What is the size of the flat-panel detector inside the table of a DR system?

Which control on the viewing station can blacken the clear or white areas around the collimation edges of a radiograph?

Which of the following should be used when imaging body parts that have extreme differences in tissue thickness?

Which of the following is a true statement regarding the centering of the body part when using digital systems?

Role of the Limited X-Ray Machine Operator

Introduction to Radiographic Equipment

Basic Mathematics for Limited Operators

Basic Physics of Radiography

X-Ray Production

X-Ray Circuit and Tube Heat Management

Principles of Exposure and Image Quality

Scatter Radiation and Its Control

Formulating X-Ray Techniques

Radiobiology and Radiation Safety

Introduction to Anatomy, positioning, and Pathology

Upper Extremity and Shoulder Girdle

Lower Extremity and Pelvis

Spine

Bony Thorax, Chest, and Abdomen

Skull, Facial Bones, and Paranasal Sinuses

Radiography of Pediatric and Geriatric Patients

Image Evaluation

Ethics, Legal Considerations, and Professionalism

Safety and Infection Control

Assessing Patients and Managing Acute Situations

Medications and Their Administration

Medical Laboratory Skills

Additional Procedures for Assessment and Diagnosis

Bone Densitometry

Filters

The greatest spatial resolution will be produced when the matrix is _ and the pixels are _.

The best quality radiographic image will be produced on the viewing monitor when there is _ SNR,_ noise.