Question 1

Increasing collimation results in reduced patient exposure,increased field size,and reduced scatter production.

Accepted Answer

A) True 
 B)False

Question 2

Grid ratios range from:

Accepted Answer

A)  2:1 to 6:1. 
B)  4:1 to 16:1. 
C)  10:1 to 24:1. 
D)  20:1 to 32:1. 
A)  2:1 to 6:1. 
B)  4:1 to 16:1. 
C)  10:1 to 24:1. 
D)  20:1 to 32:1.

Question 3

The smaller the volume of tissue irradiated,the:

Accepted Answer

A)  greater the amount of scatter produced. 
B)  less the amount of scatter produced. 
C)  greater the need to use a grid. 
D)  A and C. 
A)  greater the amount of scatter produced. 
B)  less the amount of scatter produced. 
C)  greater the need to use a grid. 
D)  A and C.

Question 4

Which beam restriction device can be cut to the size needed?

Accepted Answer

A)  A collimator 
B)  An aperture diaphragm 
C)  A cylinder 
D)  A cone 
A)  A collimator 
B)  An aperture diaphragm 
C)  A cylinder 
D)  A cone

Question 5

Why does the air-gap technique work?

Accepted Answer

A)  The scatter photons increase in energy as a result of the distance to the image receptor. 
B)  The scatter photons are more likely to miss the image receptor. 
C)  Less scatter is produced. 
D)  A and C 
A)  The scatter photons increase in energy as a result of the distance to the image receptor. 
B)  The scatter photons are more likely to miss the image receptor. 
C)  Less scatter is produced. 
D)  A and C

Question 6

As beam restriction increases,field size and patient dose _________________.

Accepted Answer

A)  increases 
B)  decreases 
C)  does not change 
A)  increases 
B)  decreases 
C)  does not change

Question 7

Which of the following statements is true?

Accepted Answer

A)  If the height of the lead strips increases and the space between the grid strips decreases, the grid will be more effective at scatter removal. 
B)  If the height of the lead strip decreases and the space between the grid strips increases, the grid will be more effective at removing scatter radiation. 
C)  A high ratio grid removes little scatter. 
D)  A grid decreases scatter production. 
A)  If the height of the lead strips increases and the space between the grid strips decreases, the grid will be more effective at scatter removal. 
B)  If the height of the lead strip decreases and the space between the grid strips increases, the grid will be more effective at removing scatter radiation. 
C)  A high ratio grid removes little scatter. 
D)  A grid decreases scatter production.

Question 8

The only reason a grid should be used is to increase radiographic contrast.

Accepted Answer

A) True 
 B)False

Question 9

What purpose does positive beam limitation serve?

Accepted Answer

A)  To prevent the technologist from placing an image receptor in the Bucky tray that is too large for the study performed 
B)  To allow the technologist to use an exposure field larger than the image receptor size 
C)  To prevent first-year students from having to repeat studies by not aligning the Bucky tray with the image receptor 
D)  To reduce patient exposure by limiting the exposure field to the same size as the image receptor in the Bucky tray 
A)  To prevent the technologist from placing an image receptor in the Bucky tray that is too large for the study performed 
B)  To allow the technologist to use an exposure field larger than the image receptor size 
C)  To prevent first-year students from having to repeat studies by not aligning the Bucky tray with the image receptor 
D)  To reduce patient exposure by limiting the exposure field to the same size as the image receptor in the Bucky tray

Question 10

The most common cause of grid cutoff is due to:

Accepted Answer

A)  using a focused grid upside down. 
B)  off-center misalignment. 
C)  off-focus misalignment. 
D)  off-level misalignment. 
A)  using a focused grid upside down. 
B)  off-center misalignment. 
C)  off-focus misalignment. 
D)  off-level misalignment.

Question 11

In general,when should a grid be used?

Accepted Answer

A)  When part thickness exceeds 4 cm 
B)  When kV exceeds 40 kVp 
C)  When kV exceeds 1.02 MeV 
D)  When part thickness exceeds 10 cm 
A)  When part thickness exceeds 4 cm 
B)  When kV exceeds 40 kVp 
C)  When kV exceeds 1.02 MeV 
D)  When part thickness exceeds 10 cm

Question 12

Grids do not reduce scatter production.

Accepted Answer

A) True 
 B)False

Question 13

A grid whose lead strips run perpendicular to the long axis of the grid is called a(n):

Accepted Answer

A)  long dimension grid. 
B)  short dimension grid. 
C)  cross-hatch grid. 
D)  alternating grid. 
A)  long dimension grid. 
B)  short dimension grid. 
C)  cross-hatch grid. 
D)  alternating grid.

Question 14

A beam-restricting device that has two or three sets of lead shutters is a(n):

Accepted Answer

A)  collimator. 
B)  aperture diaphragm. 
C)  cone. 
D)  cylinder. 
A)  collimator. 
B)  aperture diaphragm. 
C)  cone. 
D)  cylinder.

Question 15

The height of the lead strips relative to the distance between the lead strips is the measure of:

Accepted Answer

A)  contrast improvement. 
B)  grid ratio. 
C)  Bucky factor. 
D)  grid selectivity. 
A)  contrast improvement. 
B)  grid ratio. 
C)  Bucky factor. 
D)  grid selectivity.

Question 16

The unrestricted primary beam produces a(n)_________ area of exposure.

Accepted Answer

A)  round 
B)  oval 
C)  square 
D)  rectangular 
A)  round 
B)  oval 
C)  square 
D)  rectangular

Question 17

What is found between the lead strips in a grid?

Accepted Answer

A)  Lead 
B)  Tungsten 
C)  Radiopaque material 
D)  Radiolucent material 
A)  Lead 
B)  Tungsten 
C)  Radiopaque material 
D)  Radiolucent material

Question 18

An optimal AP abdomen radiograph can be produced using 40 mAs,75 kVp,and a 12:1 grid.How much mAs would be needed if the only grid available is a 6:1 ratio grid?

Accepted Answer

A)  20 mAs 
B)  24 mAs 
C)  67 mAs 
D)  80 mAs 
A)  20 mAs 
B)  24 mAs 
C)  67 mAs 
D)  80 mAs

Question 19

A device consisting of very thin lead strips with radiolucent interspaces intended to absorb scatter radiation emitted from the patient is a:

Accepted Answer

A)  collimator. 
B)  aperture diaphragm. 
C)  cone. 
D)  grid. 
A)  collimator. 
B)  aperture diaphragm. 
C)  cone. 
D)  grid.

Question 20

Significant collimation requires an increase of _____________ of the mAs.

Accepted Answer

A)  0% 
B)  1% to 5% 
C)  10% to 20% 
D)  30% to 50% 
A)  0% 
B)  1% to 5% 
C)  10% to 20% 
D)  30% to 50%

Increasing collimation results in reduced patient exposure,increased field size,and reduced scatter production.

Grid ratios range from:

The smaller the volume of tissue irradiated,the:

Which beam restriction device can be cut to the size needed?

Why does the air-gap technique work?

As beam restriction increases,field size and patient dose _________________.

Which of the following statements is true?

The only reason a grid should be used is to increase radiographic contrast.

What purpose does positive beam limitation serve?

The most common cause of grid cutoff is due to:

In general,when should a grid be used?

Grids do not reduce scatter production.

A grid whose lead strips run perpendicular to the long axis of the grid is called a(n):

A beam-restricting device that has two or three sets of lead shutters is a(n):

The height of the lead strips relative to the distance between the lead strips is the measure of:

The unrestricted primary beam produces a(n)_________ area of exposure.

What is found between the lead strips in a grid?

An optimal AP abdomen radiograph can be produced using 40 mAs,75 kVp,and a 12:1 grid.How much mAs would be needed if the only grid available is a 6:1 ratio grid?

A device consisting of very thin lead strips with radiolucent interspaces intended to absorb scatter radiation emitted from the patient is a:

Significant collimation requires an increase of _____________ of the mAs.

Radiation and Its Discovery

The X-Ray Beam

Image Formation and Radiographic Quality

Digital Imaging

Film-Screen Imaging

Exposure Technique Factors

Exposure Technique Selection

Image Evaluation

Dynamic Imaging: Fluoroscopy

Filters

Exam 7: Scatter Control

Increasing collimation results in reduced patient exposure,increased field size,and reduced scatter production.

Grid ratios range from:

The smaller the volume of tissue irradiated,the:

Which beam restriction device can be cut to the size needed?

Why does the air-gap technique work?

As beam restriction increases,field size and patient dose _________________.

Which of the following statements is true?

The only reason a grid should be used is to increase radiographic contrast.

What purpose does positive beam limitation serve?

The most common cause of grid cutoff is due to:

In general,when should a grid be used?

Grids do not reduce scatter production.

A grid whose lead strips run perpendicular to the long axis of the grid is called a(n):

A beam-restricting device that has two or three sets of lead shutters is a(n):

The height of the lead strips relative to the distance between the lead strips is the measure of:

The unrestricted primary beam produces a(n)_________ area of exposure.

What is found between the lead strips in a grid?

An optimal AP abdomen radiograph can be produced using 40 mAs,75 kVp,and a 12:1 grid.How much mAs would be needed if the only grid available is a 6:1 ratio grid?

A device consisting of very thin lead strips with radiolucent interspaces intended to absorb scatter radiation emitted from the patient is a:

Significant collimation requires an increase of _____________ of the mAs.

Radiation and Its Discovery

The X-Ray Beam

Image Formation and Radiographic Quality

Digital Imaging

Film-Screen Imaging

Exposure Technique Factors

Exposure Technique Selection

Image Evaluation

Dynamic Imaging: Fluoroscopy

Filters