Question 1

The type of grid that is usually taped to the front of an IR 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

Question 2

_____________________ collimation means _________________ field size.

Accepted Answer

A)  decreasing;increasing 
B)  increasing;increasing 
C)  decreasing;decreasing 
D)  none of the above 
A)  decreasing;increasing 
B)  increasing;increasing 
C)  decreasing;decreasing 
D)  none of the above

Question 3

The beam-restriction device that results in images with the most unsharpness around the edge of the image is the:

Accepted Answer

A)  aperture diaphragm 
B)  collimator 
C)  cone or cylinder 
D)  none of the above 
A)  aperture diaphragm 
B)  collimator 
C)  cone or cylinder 
D)  none of the above

Question 4

The distance between the grid and the convergent line is 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 5

When imaging the pelvis,changing from 14 × 17 collimation to 8 × 10 collimation requires:

Accepted Answer

A)  an increase in kVp 
B)  a decrease in kVp 
C)  an increase in mAs 
D)  a decrease in mAs 
A)  an increase in kVp 
B)  a decrease in kVp 
C)  an increase in mAs 
D)  a decrease in mAs

Question 6

Adding a grid or increasing grid ratio results in an increase in patient dose.

Accepted Answer

A) True 
 B)False

Question 7

A linear grid:

Accepted Answer

A)  has lead strips that cross each other 
B)  has lead strips that travel in one direction 
C)  is the most common type of radiographic grid 
D)  B and C 
A)  has lead strips that cross each other 
B)  has lead strips that travel in one direction 
C)  is the most common type of radiographic grid 
D)  B and C

Question 8

The grid limits the amount of scatter radiation produced in the patient.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following grids provides excellent scatter clean-up but requires close to perfect alignment to avoid cutoff?

Accepted Answer

A)  5:1 ratio grid 
B)  8:1 ratio grid 
C)  12:1 ratio grid 
D)  16:1 ratio grid 
A)  5:1 ratio grid 
B)  8:1 ratio grid 
C)  12:1 ratio grid 
D)  16:1 ratio grid

Question 10

A short-dimension grid:

Accepted Answer

A)  is typically used for most examinations 
B)  has lead strips running perpendicular to the long axis of the grid 
C)  has lead strips running parallel to the long axis of the grid 
D)  A and B 
A)  is typically used for most examinations 
B)  has lead strips running perpendicular to the long axis of the grid 
C)  has lead strips running parallel to the long axis of the grid 
D)  A and B

Question 11

The formula to use when changing from one grid to another is:

Accepted Answer

A)  mAs₁/mAs₂ = GCF₂/GCF₁ 
B)  mAs₁/mAs₂ = (GCF₂)²/GCF₁)² 
C)  mAs₁/mAs₂ = GCF₁/GCF₂ 
D)  mAs₁/mAs₂ = (GCF₁)²/GCF₂)² 
A)  mAs₁/mAs₂ = GCF₂/GCF₁ 
B)  mAs₁/mAs₂ = (GCF₂)²/GCF₁)² 
C)  mAs₁/mAs₂ = GCF₁/GCF₂ 
D)  mAs₁/mAs₂ = (GCF₁)²/GCF₂)²

Question 12

What is the grid ratio if the lead strips are 2.4 mm high,0.03 mm wide,and 0.2 mm apart?

Accepted Answer

A)  5:1 
B)  61 
C)  8:1 
D)  12:1 
A)  5:1 
B)  61 
C)  8:1 
D)  12:1

Question 13

The higher the grid ratio,the _____________ the scatter clean up and the _____________________ the radiographic contrast.

Accepted Answer

A)  better;higher 
B)  worse;lower 
C)  better;lower 
D)  worse;higher 
A)  better;higher 
B)  worse;lower 
C)  better;lower 
D)  worse;higher

Question 14

The flat piece of lead with a hole in it is the:

Accepted Answer

A)  aperture diaphragm 
B)  collimator 
C)  cone or cylinder 
D)  none of the above 
A)  aperture diaphragm 
B)  collimator 
C)  cone or cylinder 
D)  none of the above

Question 15

The automatic collimator:

Accepted Answer

A)  automatically collimates to the anatomy of interest 
B)  is required by law on all new equipment 
C)  is seldom found on modern x-ray equipment 
D)  automatically collimates to the IR size 
A)  automatically collimates to the anatomy of interest 
B)  is required by law on all new equipment 
C)  is seldom found on modern x-ray equipment 
D)  automatically collimates to the IR size

Question 16

When there is significant collimation,the amount of radiation reaching the IR is:

Accepted Answer

A)  reduced 
B)  increased 
C)  the same 
D)  none of the above 
A)  reduced 
B)  increased 
C)  the same 
D)  none of the above

Question 17

The material between the lead strips of a grid must be:

Accepted Answer

A)  radiopaque 
B)  radiolucent 
C)  made of lead 
D)  made of tungsten 
A)  radiopaque 
B)  radiolucent 
C)  made of lead 
D)  made of tungsten

Question 18

The reason the grid in the bucky reciprocates is to:

Accepted Answer

A)  absorb more scatter radiation 
B)  allow more transmitted radiation to reach the IR 
C)  blur out the grid lines 
D)  all of the above 
A)  absorb more scatter radiation 
B)  allow more transmitted radiation to reach the IR 
C)  blur out the grid lines 
D)  all of the above

Question 19

The air gap technique is based on creating a gap by increasing the ______.

Accepted Answer

A)  SID 
B)  SOD 
C)  OID 
D)  all of the above 
A)  SID 
B)  SOD 
C)  OID 
D)  all of the above

Question 20

The two major factors that affect the amount of scatter radiation produced and exiting the patient are:

Accepted Answer

A)  kVp and mAs 
B)  volume of tissue irradiated and mAs 
C)  volume of tissue irradiated and kVp 
D)  kVp and the use of a grid 
A)  kVp and mAs 
B)  volume of tissue irradiated and mAs 
C)  volume of tissue irradiated and kVp 
D)  kVp and the use of a grid

The type of grid that is usually taped to the front of an IR is the:

_____ collimation means _ field size.

The beam-restriction device that results in images with the most unsharpness around the edge of the image is the:

The distance between the grid and the convergent line is the:

When imaging the pelvis,changing from 14 × 17 collimation to 8 × 10 collimation requires:

Adding a grid or increasing grid ratio results in an increase in patient dose.

A linear grid:

The grid limits the amount of scatter radiation produced in the patient.

Which of the following grids provides excellent scatter clean-up but requires close to perfect alignment to avoid cutoff?

A short-dimension grid:

The formula to use when changing from one grid to another is:

What is the grid ratio if the lead strips are 2.4 mm high,0.03 mm wide,and 0.2 mm apart?

The higher the grid ratio,the _ the scatter clean up and the _________ the radiographic contrast.

The flat piece of lead with a hole in it is the:

The automatic collimator:

When there is significant collimation,the amount of radiation reaching the IR is:

The material between the lead strips of a grid must be:

The reason the grid in the bucky reciprocates is to:

The air gap technique is based on creating a gap by increasing the ______.

The two major factors that affect the amount of scatter radiation produced and exiting the patient are:

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

The type of grid that is usually taped to the front of an IR is the:

_____________________ collimation means _________________ field size.

The beam-restriction device that results in images with the most unsharpness around the edge of the image is the:

The distance between the grid and the convergent line is the:

When imaging the pelvis,changing from 14 × 17 collimation to 8 × 10 collimation requires:

Adding a grid or increasing grid ratio results in an increase in patient dose.

A linear grid:

The grid limits the amount of scatter radiation produced in the patient.

Which of the following grids provides excellent scatter clean-up but requires close to perfect alignment to avoid cutoff?

A short-dimension grid:

The formula to use when changing from one grid to another is:

What is the grid ratio if the lead strips are 2.4 mm high,0.03 mm wide,and 0.2 mm apart?

The higher the grid ratio,the _____________ the scatter clean up and the _____________________ the radiographic contrast.

The flat piece of lead with a hole in it is the:

The automatic collimator:

When there is significant collimation,the amount of radiation reaching the IR is:

The material between the lead strips of a grid must be:

The reason the grid in the bucky reciprocates is to:

The air gap technique is based on creating a gap by increasing the ______.

The two major factors that affect the amount of scatter radiation produced and exiting the patient are:

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

_____ collimation means _ field size.

The higher the grid ratio,the _ the scatter clean up and the _________ the radiographic contrast.