Question 1

If 24 mAs and a 6:1 grid results in an excellent radiograph,how much mAs is needed with a 5:1 grid?

Accepted Answer

A)  16 mAs 
B)  20 mAs 
C)  28.8 mAs 
D)  36 mAs 
A)  16 mAs 
B)  20 mAs 
C)  28.8 mAs 
D)  36 mAs A

Question 2

To compensate for the reduction of radiation reaching the IR when a grid is used,___________ is typically increased.

Accepted Answer

A)  SID 
B)  kVp 
C)  mAs 
D)  OID 
A)  SID 
B)  kVp 
C)  mAs 
D)  OID C

Question 3

Which of the following factors need to be considered when determining the grid to be used for a specific examination?

Accepted Answer

A)  patient exposure 
B)  level of contrast improvement needed 
C)  focal range 
D)  all of the above 
A)  patient exposure 
B)  level of contrast improvement needed 
C)  focal range 
D)  all of the above D

Question 4

During the exposure,the grid in the bucky:

Accepted Answer

A)  reciprocates 
B)  moves slightly from side to side 
C)  moves slightly from top to bottom 
D)  A and B 
A)  reciprocates 
B)  moves slightly from side to side 
C)  moves slightly from top to bottom 
D)  A and B

Question 5

Linear grids are the most commonly used because:

Accepted Answer

A)  they are very inexpensive 
B)  the tube can be angled in all directions 
C)  the tube can be angled in the direction of the lead lines 
D)  all of the above 
A)  they are very inexpensive 
B)  the tube can be angled in all directions 
C)  the tube can be angled in the direction of the lead lines 
D)  all of the above

Question 6

An IR that has a grid permanently attached to its front surface is a:

Accepted Answer

A)  wafer grid 
B)  bucky 
C)  grid cap 
D)  grid cassette 
A)  wafer grid 
B)  bucky 
C)  grid cap 
D)  grid cassette

Question 7

The relationship between the height of the lead strips and the distance between them is the grid:

Accepted Answer

A)  number 
B)  ratio 
C)  frequency 
D)  rating 
A)  number 
B)  ratio 
C)  frequency 
D)  rating

Question 8

The only grid cutoff error that can occur with a parallel grid is:

Accepted Answer

A)  upside-down focused 
B)  off-level 
C)  off-center 
D)  off-focus 
A)  upside-down focused 
B)  off-level 
C)  off-center 
D)  off-focus

Question 9

The grid is located:

Accepted Answer

A)  just below the x-ray tube window 
B)  between the patient and IR 
C)  just below the IR 
D)  none of the above 
A)  just below the x-ray tube window 
B)  between the patient and IR 
C)  just below the IR 
D)  none of the above

Question 10

When the SID is above or below the focal range you have _________ cutoff.

Accepted Answer

A)  upside-down focused 
B)  off-level 
C)  off-center 
D)  off-focus 
A)  upside-down focused 
B)  off-level 
C)  off-center 
D)  off-focus

Question 11

To determine the amount of mAs to be increased when making grid changes,it is necessary to use the GCF,also known as the:

Accepted Answer

A)  grid constancy figure 
B)  grid compensatory factor 
C)  general compensation factuals 
D)  grid conversion factor 
A)  grid constancy figure 
B)  grid compensatory factor 
C)  general compensation factuals 
D)  grid conversion factor

Question 12

The formula for the grid conversion factor is:

Accepted Answer

A)  GCF = mAs without grid / mAs with grid 
B)  GCF = mAs with grid - mAs without grid 
C)  GCF = mAs with grid / mAs without grid 
D)  GCF = mAs without grid - mAs with grid 
A)  GCF = mAs without grid / mAs with grid 
B)  GCF = mAs with grid - mAs without grid 
C)  GCF = mAs with grid / mAs without grid 
D)  GCF = mAs without grid - mAs with grid

Question 13

If all the convergent points were connected along the length of the grid they would form the:

Accepted Answer

A)  convergent line 
B)  focal distance 
C)  convergent point 
D)  focal range 
A)  convergent line 
B)  focal distance 
C)  convergent point 
D)  focal range

Question 14

The probability of a Compton interaction occurring is related to:

Accepted Answer

A)  the energy of the x-ray photon 
B)  the atomic number of the matter 
C)  the mAs used 
D)  all of the above 
A)  the energy of the x-ray photon 
B)  the atomic number of the matter 
C)  the mAs used 
D)  all of the above

Question 15

A focused grid's lead strips are angled to match:

Accepted Answer

A)  the anode angle 
B)  the angle of the x-rays in the primary beam 
C)  the angle of the scattered photons leaving the patient 
D)  the tube angulation 
A)  the anode angle 
B)  the angle of the x-rays in the primary beam 
C)  the angle of the scattered photons leaving the patient 
D)  the tube angulation

Question 16

The Moiré effect can be caused by:

Accepted Answer

A)  using a grid with a frequency similar to the CR laser scanning frequency 
B)  using a focused grid upside down in the bucky 
C)  using a grid cassette in the bucky 
D)  A and C 
A)  using a grid with a frequency similar to the CR laser scanning frequency 
B)  using a focused grid upside down in the bucky 
C)  using a grid cassette in the bucky 
D)  A and C

Question 17

Scatter radiation is of no value in radiographic imaging.

Accepted Answer

A) True 
 B)False

Question 18

The grid used for the air gap technique should be high frequency.

Accepted Answer

A) True 
 B)False

Question 19

The purpose of automatic collimation is:

Accepted Answer

A)  improved image quality 
B)  limiting patient exposure 
C)  increasing the cost of equipment 
D)  none of the above 
A)  improved image quality 
B)  limiting patient exposure 
C)  increasing the cost of equipment 
D)  none of the above

Question 20

The grid is part of a device located just below the tabletop that also includes a tray to hold the IR.This device is the:

Accepted Answer

A)  wafer grid 
B)  bucky 
C)  grid cap 
D)  grid cassette 
A)  wafer grid 
B)  bucky 
C)  grid cap 
D)  grid cassette

If 24 mAs and a 6:1 grid results in an excellent radiograph,how much mAs is needed with a 5:1 grid?

To compensate for the reduction of radiation reaching the IR when a grid is used,___________ is typically increased.

Which of the following factors need to be considered when determining the grid to be used for a specific examination?

During the exposure,the grid in the bucky:

Linear grids are the most commonly used because:

An IR that has a grid permanently attached to its front surface is a:

The relationship between the height of the lead strips and the distance between them is the grid:

The only grid cutoff error that can occur with a parallel grid is:

The grid is located:

When the SID is above or below the focal range you have _________ cutoff.

To determine the amount of mAs to be increased when making grid changes,it is necessary to use the GCF,also known as the:

The formula for the grid conversion factor is:

If all the convergent points were connected along the length of the grid they would form the:

The probability of a Compton interaction occurring is related to:

A focused grid's lead strips are angled to match:

The Moiré effect can be caused by:

Scatter radiation is of no value in radiographic imaging.

The grid used for the air gap technique should be high frequency.

The purpose of automatic collimation is:

The grid is part of a device located just below the tabletop that also includes a tray to hold the IR.This device is the:

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

Image Receptors

Automatic Exposure Control

Image Intensified Fluoroscopy

Additional Equipment

Computed Tomography

Filters

Exam 11: Scatter Control

If 24 mAs and a 6:1 grid results in an excellent radiograph,how much mAs is needed with a 5:1 grid?

To compensate for the reduction of radiation reaching the IR when a grid is used,___________ is typically increased.

Which of the following factors need to be considered when determining the grid to be used for a specific examination?

During the exposure,the grid in the bucky:

Linear grids are the most commonly used because:

An IR that has a grid permanently attached to its front surface is a:

The relationship between the height of the lead strips and the distance between them is the grid:

The only grid cutoff error that can occur with a parallel grid is:

The grid is located:

When the SID is above or below the focal range you have _________ cutoff.

To determine the amount of mAs to be increased when making grid changes,it is necessary to use the GCF,also known as the:

The formula for the grid conversion factor is:

If all the convergent points were connected along the length of the grid they would form the:

The probability of a Compton interaction occurring is related to:

A focused grid's lead strips are angled to match:

The Moiré effect can be caused by:

Scatter radiation is of no value in radiographic imaging.

The grid used for the air gap technique should be high frequency.

The purpose of automatic collimation is:

The grid is part of a device located just below the tabletop that also includes a tray to hold the IR.This device is the:

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

Image Receptors

Automatic Exposure Control

Image Intensified Fluoroscopy

Additional Equipment

Computed Tomography

Filters