Question 1

Approximately 20% of the primary x-ray beam actually reaches the image receptor.

Accepted Answer

A) True 
 B)False

Question 2

The probability of total photon absorption by the photoelectric effect depends on the:

Accepted Answer

A)  energy of the incoming x-ray photon. 
B)  energy of the ejected electron. 
C)  atomic number of the anatomic tissue. 
D)  A and C. 
E)  B and C. 
A)  energy of the incoming x-ray photon. 
B)  energy of the ejected electron. 
C)  atomic number of the anatomic tissue. 
D)  A and C. 
E)  B and C.

Question 3

The amount of x-ray beam attenuation is affected by the:

Accepted Answer

A)  thickness of the body part. 
B)  atomic number of the atoms in the tissue. 
C)  tissue density. 
D)  energy of the x-ray beam. 
E)  A and B only.
F) all of the above. 
A)  thickness of the body part. 
B)  atomic number of the atoms in the tissue. 
C)  tissue density. 
D)  energy of the x-ray beam. 
E)  A and B only.
F) all of the above.

Question 4

Quantum noise is significantly more likely with digital imaging.

Accepted Answer

A) True 
 B)False

Question 5

The Compton interaction can occur within all diagnostic x-ray energies.

Accepted Answer

A) True 
 B)False

Question 6

As compared to digital imaging,film-screen imaging has:

Accepted Answer

A)  a wider dynamic range. 
B)  a narrower dynamic range. 
C)  the same dynamic range. 
D)  no dynamic range. 
A)  a wider dynamic range. 
B)  a narrower dynamic range. 
C)  the same dynamic range. 
D)  no dynamic range.

Question 7

A radiographic image with a large number of similar densities that have small differences between them:

Accepted Answer

A)  appears gray. 
B)  has long scale contrast. 
C)  has low contrast. 
D)  all of the above. 
A)  appears gray. 
B)  has long scale contrast. 
C)  has low contrast. 
D)  all of the above.

Question 8

Interactions of low-energy x-rays (energies below the diagnostic range)with tissue include:

Accepted Answer

A)  pair production. 
B)  coherent scattering. 
C)  photodisintegration. 
D)  A and B. 
E)  A and C. 
A)  pair production. 
B)  coherent scattering. 
C)  photodisintegration. 
D)  A and B. 
E)  A and C.

Question 9

When the x-ray photon strikes an atom within the tissue being imaged and loses all of its energy to an inner shell electron of that atom,the photon is said to have been _____ and undergone the _____.

Accepted Answer

A)  transmitted; Compton effect 
B)  absorbed; photoelectric interaction 
C)  attenuated; Compton effect 
D)  scattered; coherent interaction 
A)  transmitted; Compton effect 
B)  absorbed; photoelectric interaction 
C)  attenuated; Compton effect 
D)  scattered; coherent interaction

Question 10

The brightness/density and contrast of film-screen and digital manifest images can be adjusted,just in different ways.

Accepted Answer

A) True 
 B)False

Question 11

The quality of a radiographic image depends on:

Accepted Answer

A)  brightness-visibility of anatomic structures. 
B)  accuracy of the recorded anatomic structural lines. 
C)  contrast-visibility of anatomic structures. 
D)  A and B. 
E)  A, B, and C. 
A)  brightness-visibility of anatomic structures. 
B)  accuracy of the recorded anatomic structural lines. 
C)  contrast-visibility of anatomic structures. 
D)  A and B. 
E)  A, B, and C.

Question 12

When an image is distorted,spatial resolution is increased.

Accepted Answer

A) True 
 B)False

Question 13

_____ is the loss of some of the energy from the x-ray beam as it passes through the tissue being imaged.

Accepted Answer

A)  Compensating filtration 
B)  Attenuation 
C)  Photon transmission 
D)  Photoelectric scattering 
A)  Compensating filtration 
B)  Attenuation 
C)  Photon transmission 
D)  Photoelectric scattering

Question 14

When the x-ray photon travels completely through the part,that activity is called:

Accepted Answer

A)  acceleration. 
B)  attenuation. 
C)  transmission. 
D)  absorption. 
A)  acceleration. 
B)  attenuation. 
C)  transmission. 
D)  absorption.

Question 15

An increased part thickness results in:

Accepted Answer

A)  increased beam attenuation. 
B)  decreased beam attenuation. 
C)  no effect on beam attenuation. 
A)  increased beam attenuation. 
B)  decreased beam attenuation. 
C)  no effect on beam attenuation.

Question 16

The accuracy of the anatomic structural lines recorded in the radiographic image is determined by the:

Accepted Answer

A)  temporal resolution. 
B)  spatial resolution. 
C)  contrast resolution. 
D)  none of the above. 
A)  temporal resolution. 
B)  spatial resolution. 
C)  contrast resolution. 
D)  none of the above.

Question 17

Shape distortion includes:

Accepted Answer

A)  magnification. 
B)  elongation. 
C)  size distortion. 
D)  all of the above. 
A)  magnification. 
B)  elongation. 
C)  size distortion. 
D)  all of the above.

Question 18

The number of shades of gray that can be displayed by a computer system is:

Accepted Answer

A)  scale of contrast. 
B)  short scale. 
C)  long scale. 
D)  gray scale. 
A)  scale of contrast. 
B)  short scale. 
C)  long scale. 
D)  gray scale.

Question 19

Spatial resolution is improved with:

Accepted Answer

A)  increased pixel size. 
B)  increased pixel pitch. 
C)  increased pixel density. 
D)  increased pixel bit depth. 
A)  increased pixel size. 
B)  increased pixel pitch. 
C)  increased pixel density. 
D)  increased pixel bit depth.

Question 20

A body tissue with an increased tissue density results in:

Accepted Answer

A)  increased beam attenuation. 
B)  decreased beam attenuation. 
C)  no effect on beam attenuation. 
A)  increased beam attenuation. 
B)  decreased beam attenuation. 
C)  no effect on beam attenuation.

Approximately 20% of the primary x-ray beam actually reaches the image receptor.

The probability of total photon absorption by the photoelectric effect depends on the:

The amount of x-ray beam attenuation is affected by the:

Quantum noise is significantly more likely with digital imaging.

The Compton interaction can occur within all diagnostic x-ray energies.

As compared to digital imaging,film-screen imaging has:

A radiographic image with a large number of similar densities that have small differences between them:

Interactions of low-energy x-rays (energies below the diagnostic range)with tissue include:

When the x-ray photon strikes an atom within the tissue being imaged and loses all of its energy to an inner shell electron of that atom,the photon is said to have been _ and undergone the _.

The brightness/density and contrast of film-screen and digital manifest images can be adjusted,just in different ways.

The quality of a radiographic image depends on:

When an image is distorted,spatial resolution is increased.

_____ is the loss of some of the energy from the x-ray beam as it passes through the tissue being imaged.

When the x-ray photon travels completely through the part,that activity is called:

An increased part thickness results in:

The accuracy of the anatomic structural lines recorded in the radiographic image is determined by the:

Shape distortion includes:

The number of shades of gray that can be displayed by a computer system is:

Spatial resolution is improved with:

A body tissue with an increased tissue density results in:

Radiation and Its Discovery

The X-Ray Beam

Digital Imaging

Film-Screen Imaging

Exposure Technique Factors

Scatter Control

Exposure Technique Selection

Image Evaluation

Dynamic Imaging: Fluoroscopy

Filters

Exam 3: Image Formation and Radiographic Quality

Approximately 20% of the primary x-ray beam actually reaches the image receptor.

The probability of total photon absorption by the photoelectric effect depends on the:

The amount of x-ray beam attenuation is affected by the:

Quantum noise is significantly more likely with digital imaging.

The Compton interaction can occur within all diagnostic x-ray energies.

As compared to digital imaging,film-screen imaging has:

A radiographic image with a large number of similar densities that have small differences between them:

Interactions of low-energy x-rays (energies below the diagnostic range)with tissue include:

When the x-ray photon strikes an atom within the tissue being imaged and loses all of its energy to an inner shell electron of that atom,the photon is said to have been _____ and undergone the _____.

The brightness/density and contrast of film-screen and digital manifest images can be adjusted,just in different ways.

The quality of a radiographic image depends on:

When an image is distorted,spatial resolution is increased.

_____ is the loss of some of the energy from the x-ray beam as it passes through the tissue being imaged.

When the x-ray photon travels completely through the part,that activity is called:

An increased part thickness results in:

The accuracy of the anatomic structural lines recorded in the radiographic image is determined by the:

Shape distortion includes:

The number of shades of gray that can be displayed by a computer system is:

Spatial resolution is improved with:

A body tissue with an increased tissue density results in:

Radiation and Its Discovery

The X-Ray Beam

Digital Imaging

Film-Screen Imaging

Exposure Technique Factors

Scatter Control

Exposure Technique Selection

Image Evaluation

Dynamic Imaging: Fluoroscopy

Filters

When the x-ray photon strikes an atom within the tissue being imaged and loses all of its energy to an inner shell electron of that atom,the photon is said to have been _ and undergone the _.