Deck 8: Image Production

Question 1

In producing a radiographic image,which of the following occurs last?

A)Differential absorption.
B)Quality and quantity of x-ray beam is set at console.
C)Radiation interacts with image receptor.
D)Radiation exits the patient with different energies.

Answer 1

Radiation interacts with image receptor.

Question 2

Scatter radiation may

A)expose people near the patient
B)increase patient exposure
C)contributes no useful information if it strikes the image receptor
D)all of the above

Answer 2

all of the above

Question 3

At higher kilovoltages within the diagnostic range

A)the percentage of photoelectric interactions increases
B)the percentage of photoelectric interactions decreases
C)the percentage of photoelectric interactions remains the same
D)none of the above

Answer 3

the percentage of photoelectric interactions decreases

Question 4

Coherent scattering

A)is a significant interaction during radiographic imaging
B)has minimal effect on the imaging process
C)never affects the diagnostic image
D)none of the above

Question 5

The latent image that is formed on the image receptor is the

A)visible image
B)invisible image
C)A and B
D)none of the above

Question 6

The device that receives the radiation after it exits the patient is the

A)remnant beam
B)primary beam
C)image receptor
D)none of the above

Question 7

The photoelectric interaction involves removal of

A)an inner-shell electron
B)an outer-shell electron
C)both inner- and outer-shell electrons
D)no electrons

Question 8

With the photoelectric interaction,after the incident photon ejects an inner-shell electron,the energy of the photon is

A)greater than the original energy
B)the same as the original energy
C)slightly less than the original energy
D)reduced to zero

Question 9

The ability to remove electrons from an atom is

A)absorption
B)transmission
C)ionization
D)none of the above

Question 10

Attenuation of the x-ray beam in the diagnostic range is due to

A)absorption
B)scattering
C)transmission
D)A and B
E)B and C

Question 11

Complete absorption of the diagnostic range x-ray photon is the interaction known as

A)Compton scattering
B)photoelectric interaction
C)classical scattering
D)photodisintegration

Question 12

Scattering in the diagnostic range is due to

A)photoelectric interactions
B)absorption
C)the Compton effect
D)all of the above

Question 13

Which of the following is an example of an image receptor?

A)Film-screen.
B)Digital.
C)Absorption.
D)A and B.

Question 14

The probability of a Compton interaction is _______________ in bone than soft tissue.

A)less
B)the same
C)higher
D)none of the above

Question 15

In producing a radiographic image,which of the following occurs first?

A)Differential absorption.
B)Quality and quantity of x-ray beam is set at console.
C)Radiation interacts with image receptor.
D)Radiation exits the patient with different energies.

Question 16

At higher kilovoltages within the diagnostic range

A)the percentage of Compton interactions increases
B)the percentage of Compton interactions decreases
C)the percentage of Compton interactions remains the same
D)none of the above

Question 17

Differential absorption occurs because different tissues have varying amounts of

A)photoelectric interactions
B)Compton scattering
C)coherent scattering
D)pair production

Question 18

Transmission refers to

A)all x-rays in the beam before entering the patient
B)x-rays leaving the patient that did not interact with atoms
C)all x-rays leaving the patient
D)the process of sending the x-ray beam through the patient

Question 19

The secondary photon that results from the photoelectric interaction

A)has the same energy as the incident photon
B)has high energy
C)has low energy
D)typically leaves the patient as scatter radiation

Question 20

The probability of a Compton interaction occurring depends on

A)the type of tissue being imaged
B)the binding energy of the atom's inner-shell electron
C)the energy of the incoming x-ray photon
D)all of the above

Question 21

Tissue that is more dense results in

A)increased attenuation
B)decreased attenuation
C)no change in attenuation

Question 22

Imaging which of the following results in the most attenuation?

A)Bone.
B)Air in lungs.
C)Fat.
D)Muscle.

Question 23

Imaging tissues with lower atomic numbers results in

A)increased attenuation
B)decreased attenuation
C)no change in attenuation

Question 24

A high-energy beam results in

A)increased attenuation
B)decreased attenuation
C)no change in attenuation

Question 25

Scatter radiation that reaches the image receptor creates

A)unwanted density
B)useful information
C)fog
D)A and B
E)A and C

Question 26

After processing,there is a __________ image.

A)visible
B)manifest
C)latent
D)A and B
E)A and C

Question 27

Another name for remnant radiation is

A)transmitted radiation
B)scatter radiation
C)exit radiation
D)none of the above

Question 28

Tissues with higher atomic numbers appear __________ on a digital image.

A)darker
B)lighter
C)brighter
D)less bright

Question 29

For every 4-5 cm of tissue,the x-ray beam quantity is reduced by approximately

A)10%
B)25%
C)50%
D)75%

Question 30

The computer is associated with

A)film-screen imaging
B)digital imaging
C)film-screen and digital imaging

Question 31

Before processing,the image receptor has a(n)__________ image.

A)latent
B)visible
C)invisible
D)A and B
E)A and C

Question 32

Less than _________ of the primary beam entering the part reaches the image receptor.

A)1%
B)5%
C)18%
D)99%

Question 33

Imaging a thicker part results in

A)more x-ray photons reaching the image receptor
B)fewer x-ray photons reaching the image receptor
C)no change in the number of photons reaching the image receptor
D)none of the above

Question 34

Matter per unit volume defines

A)tissue thickness
B)tissue density
C)tissue composition
D)tissue attenuation

Question 35

The various shades of gray or brightness created on the radiographic image

A)are present because of differential absorption
B)makes the anatomic structures visible
C)represent the radiation that was absorbed or transmitted
D)all of the above

Question 36

Increasing the thickness of the part being imaged results in

A)increased attenuation
B)decreased attenuation
C)no change in attenuation

Question 37

A low-kilovoltage x-ray beam results in

A)increased attenuation
B)decreased attenuation
C)no change in attenuation

Question 38

Imaging which of the following results in the least attenuation?

A)Bone.
B)Air in lungs.
C)Fat.
D)Muscle.

Question 39

Intensifying screens are associated with

A)film-screen imaging
B)digital imaging
C)film-screen and digital imaging

Question 40

Decreased attenuation results in

A)more x-ray photons reaching the image receptor
B)fewer x-ray photons reaching the image receptor
C)no change in the number of photons reaching the image receptor
D)none of the above

Question 41

Image intensification is part of

A)a film-screen imaging system
B)a digital imaging system
C)a fluoroscopic imaging system
D)all of the above

Question 42

Reduction in the energy or amount of radiation in the primary beam is attenuation.

Question 43

An example of an anatomic structure typically imaged with fluoroscopy is the

A)spine
B)knee
C)stomach and esophagus
D)head

Question 44

Place the following image intensification steps in the correct order,from beginning to end:
I electrons are accelerated toward anode
II light energy is converted to electrons
III electrons strike phosphor and are converted to light
IV remnant radiation is converted to light

A)IV,II,I,III
B)III,II,I,IV
C)II,III,IV,I
D)I,II,IV,III

Question 45

In the image intensifier,the input phosphor

A)converts remnant radiation to light
B)focuses the electrons
C)converts light to electrons
D)absorbs the energized electrons and produces a brighter image

Question 46

Fluoroscopy produces

A)static imaging
B)dynamic imaging
C)still imaging
D)none of the above

Question 47

Place the following digital imaging steps in the correct order,from beginning to end:
I remnant radiation reaches the digital image receptor
II the manifest image is displayed on a monitor
III the manifest image can be adjusted because it is composed of digital data
IV the latent image is processed by the computer

A)III,IV,I,II
B)I,IV,II,III
C)I,II,III,IV
D)IV,III,II,I

Question 48

Chemical processing is used to create the manifest image in

A)film-screen imaging
B)digital imaging
C)film-screen and digital imaging

Question 49

Place the following film-screen imaging steps in the correct order,from beginning to end:
I remnant radiation is absorbed by intensifying screens
II chemical processing creates a permanent image
III light from intensifying screens expose film emulsion
IV remnant radiation reaches the cassette

A)I,II,IV,III
B)IV,III,I,II
C)III,II,IV,I
D)IV,I,III,II

Question 50

In the image intensifier,the photocathode

A)converts remnant radiation to light
B)focuses the electrons
C)converts light to electrons
D)absorbs the energized electrons and produces a brighter image

Question 51

Brightness gain of the image intensifier is the

A)increase in the number of light intensities at the output phosphor
B)increased brightness of the image because the output phosphor is much smaller than the input phosphor
C)combination of minification gain and flux gain
D)none of the above

Question 52

Minification gain of the image intensifier is the

A)increase in the number of light intensities at the output phosphor
B)increased brightness of the image because the output phosphor is much smaller than the input phosphor
C)combination of minification gain and flux gain
D)none of the above

Question 53

In the image intensifier,the electrostatic lenses

A)convert remnant radiation to light
B)focus the electrons
C)convert light to electrons
D)absorb the energized electrons and produces a brighter image

Question 54

In the image intensifier,the output phosphor

A)converts remnant radiation to light
B)focuses the electrons
C)converts light to electrons
D)absorbs the energized electrons and produces a brighter image

Question 55

Photoelectric interactions occur only at the lower end of the diagnostic range of photon energies.

Question 56

Flux gain of the image intensifier is the

A)increase in the number of light intensities at the output phosphor
B)increased brightness of the image as a result of the output phosphor being much smaller than the input phosphor
C)combination of minification gain and flux gain
D)none of the above

Question 57

Production of a static or still image is associated with

A)film-screen imaging
B)digital imaging
C)film-screen and digital imaging

Question 58

It is not possible for a photoelectric interaction to occur between a 50-keV x-ray photon and an atom with inner-shell electrons that have a binding energy of 60 keV or more.

Question 59

Permanent radiographic images of the specific areas seen during the fluoroscopic procedures can be recorded

A)on film
B)on the computer
C)A and B
D)neither A nor B

Question 60

The purpose of image intensification is to

A)make the fluoroscopy image brighter
B)intensify the radiation used during fluoroscopy
C)allow the fluoroscopic image to be visible
D)none of the above

Question 61

All of the radiation that reaches the image receptor is used to create the radiographic image.

Question 62

During conventional fluoroscopy,the x-ray beam stays on for an extended time.

Question 63

The image from the output phosphor of the image intensifier is displayed on a television monitor.

Question 64

After the x-ray beam enters the patient and has many photoelectric interactions,the quantity of the beam increases.

Question 65

Scattered and secondary radiation must be eliminated during radiographic imaging.

Question 66

The radiographer has no control over the radiographic visibility of anatomic structures because the tissue does not change.