Question 1

What is the grid ratio if the lead strips are 2.4 mm high,0.02 mm wide,and 0.3 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 2

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 3

The number of lead lines per inch or centimeter is the grid

Accepted Answer

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

Question 4

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 5

When using automatic collimation,collimating to the anatomy of interest is an unnecessary waste of time;the beam is already collimated.

Accepted Answer

A) True 
 B)False

Question 6

The field shape produced by a collimator is

Accepted Answer

A) round 
B) oval 
C) rectangular 
D) all of the above 
A) round 
B) oval 
C) rectangular 
D) all of the above

Question 7

The beam-restriction device that includes a visible light projecting the x-ray field size onto the patient 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 8

The simplest type of beam-restricting device is a flat piece of lead with a hole in it called a(n)

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 9

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 10

If 22 mAs and a 5:1 grid results in an excellent radiograph,how much mAs is needed with a 12:1 grid?

Accepted Answer

A) 8.8 mAs. 
B) 9.2 mAs. 
C) 52.8 mAs. 
D) 55 mAs. 
A) 8.8 mAs. 
B) 9.2 mAs. 
C) 52.8 mAs. 
D) 55 mAs.

Question 11

Grid cutoff results in

Accepted Answer

A) reduced exposure to the IR 
B) a light film-screen image 
C) possible quantum mottle 
D) all of the above 
A) reduced exposure to the IR 
B) a light film-screen image 
C) possible quantum mottle 
D) all of the above

Question 12

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

Question 13

Grids absorb almost all of the scatter radiation and allow all of the transmitted photons to pass through to the IR.

Accepted Answer

A) True 
 B)False

Question 14

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 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

A flat piece of lead with a hole in it that has a flange directed toward the patient is a(n)

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 17

Anyone in the room during an exposure must wear a lead apron to absorb the scatter radiation produced in the

Accepted Answer

A) table 
B) patient 
C) air 
D) beam 
A) table 
B) patient 
C) air 
D) beam

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

Which of the following produces the greatest amount of scatter radiation exiting the patient?

Accepted Answer

A) Low kVp and small field size. 
B) Low kVp and large field size. 
C) High kVp and small field size. 
D) High kVp and large field size. 
A) Low kVp and small field size. 
B) Low kVp and large field size. 
C) High kVp and small field size. 
D) High kVp and large field size.

Question 20

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

What is the grid ratio if the lead strips are 2.4 mm high,0.02 mm wide,and 0.3 mm apart?

The formula for the grid conversion factor is

The number of lead lines per inch or centimeter is the grid

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

When using automatic collimation,collimating to the anatomy of interest is an unnecessary waste of time;the beam is already collimated.

The field shape produced by a collimator is

The beam-restriction device that includes a visible light projecting the x-ray field size onto the patient is the

The simplest type of beam-restricting device is a flat piece of lead with a hole in it called a(n)

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

If 22 mAs and a 5:1 grid results in an excellent radiograph,how much mAs is needed with a 12:1 grid?

Grid cutoff results in

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

Grids absorb almost all of the scatter radiation and allow all of the transmitted photons to pass through to the IR.

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

The automatic collimator

A flat piece of lead with a hole in it that has a flange directed toward the patient is a(n)

Anyone in the room during an exposure must wear a lead apron to absorb the scatter radiation produced in the

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

Which of the following produces the greatest amount of scatter radiation exiting the patient?

The purpose of automatic collimation is

Introduction to the Imaging Sciences

Structure of the Atom

Electromagnetic and Particulate Radiation

The X-Ray Circuit

The X-Ray Tube

X-Ray Production

X-Ray Interactions With Matter

Image Production

Image Quality and Characteristics

Radiographic Exposure Technique

Image Receptors

Exposure Technique Selection

Image Intensified Fluoroscopy

Additional Equipment

Computed Tomography

Filters

Exam 11: Scatter Control

What is the grid ratio if the lead strips are 2.4 mm high,0.02 mm wide,and 0.3 mm apart?

The formula for the grid conversion factor is

The number of lead lines per inch or centimeter is the grid

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

When using automatic collimation,collimating to the anatomy of interest is an unnecessary waste of time;the beam is already collimated.

The field shape produced by a collimator is

The beam-restriction device that includes a visible light projecting the x-ray field size onto the patient is the

The simplest type of beam-restricting device is a flat piece of lead with a hole in it called a(n)

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

If 22 mAs and a 5:1 grid results in an excellent radiograph,how much mAs is needed with a 12:1 grid?

Grid cutoff results in

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

Grids absorb almost all of the scatter radiation and allow all of the transmitted photons to pass through to the IR.

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

The automatic collimator

A flat piece of lead with a hole in it that has a flange directed toward the patient is a(n)

Anyone in the room during an exposure must wear a lead apron to absorb the scatter radiation produced in the

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

Which of the following produces the greatest amount of scatter radiation exiting the patient?

The purpose of automatic collimation is

Introduction to the Imaging Sciences

Structure of the Atom

Electromagnetic and Particulate Radiation

The X-Ray Circuit

The X-Ray Tube

X-Ray Production

X-Ray Interactions With Matter

Image Production

Image Quality and Characteristics

Radiographic Exposure Technique

Image Receptors

Exposure Technique Selection

Image Intensified Fluoroscopy

Additional Equipment

Computed Tomography

Filters