Deck 8: Image Production

Question 1

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 these

Answer 1

Image receptor

Question 2

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 these

Answer 2

the energy of the incoming x-ray photon

Question 3

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

Answer 3

has low energy

Question 4

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 5

Scattering in the diagnostic range is due to

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

Question 6

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

A) visible image
B) invisible image
C) manifest image
D) none of these

Question 7

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

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

Question 8

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 9

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

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

Question 10

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

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

Question 11

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

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

Question 12

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

A) Film-screen.
B) Digital.
C) Analog digital converter.
D) Film-screen and digital.

Question 13

The ability to remove electrons from an atom is

A) absorption
B) transmission
C) ionization
D) none of these

Question 14

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 these

Question 15

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 these

Question 16

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 17

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 these

Question 18

Differential absorption occurs because different tissues have varying amounts of

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

Question 19

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

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

Question 20

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 these

Question 21

Intensifying screens are associated with

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

Question 22

Matter per unit volume defines

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

Question 23

A high-energy beam results in

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

Question 24

After processing, there is a image.

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

Question 25

Imaging which of the following results in the most attenuation?

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

Question 26

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

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

Question 27

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) increased absorption

Question 28

Increasing the thickness of the part being imaged results in

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

Question 29

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 these

Question 30

Scatter radiation that reaches the image receptor creates

A) unwanted exposure
B) useful information
C) fog
D) unwanted exposure and fog

Question 31

Imaging which of the following results in the least attenuation?

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

Question 32

Tissue that is more dense results in

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

Question 33

A low-kilovoltage x-ray beam results in

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

Question 34

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

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

Question 35

Imaging tissues with lower atomic numbers results in

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

Question 36

Another name for remnant radiation is

A) transmitted radiation
B) scatter radiation
C) exit radiation
D) absorbed radiation

Question 37

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 38

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

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

Question 39

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 these

Question 40

The computer is associated with

A) film-screen imaging
B) digital imaging
C) film-screen and digital imaging
D) none of these

Question 41

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

Question 42

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 intensifying screens

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

Question 43

A digital image is composed of a combination of rows and columns recorded as a:

A) dynamic image
B) latent image
C) pixel
D) matrix

Question 44

Fluoroscopy produces dynamic imaging by using __________________ equipment.

A) image-intensified
B) flat panel detector
C) film-screen
D) image-intensified and flat panel detector

Question 45

Chemical processing is used to create the manifest image in

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

Question 46

A pixel's ______________ determines the amount the shades of gray that can be displayed in a digital image.

A) size
B) location
C) height
D) bit depth

Question 47

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

Question 48

During fluoroscopy, the x-ray tube is usually positioned underneath the table.

Question 49

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 50

Scattered and secondary radiation must be eliminated during radiographic imaging.

Question 51

A digital imaging system that displays a greater number of shades of gray has better contrast resolution.

Question 52

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

Question 53

The process of differential absorption for image formation is different depending on the type of imaging system.

Question 54

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 55

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

Question 56

Production of a static or still image is associated with

A) film-screen imaging
B) digital imaging
C) dynamic imaging
D) film-screen and digital only

Question 57

Each ___________ is recorded as a single numerical value representing a single brightness level displayed on a monitor.

A) pixel
B) crystal
C) matrix
D) none of these

Question 58

What refers to the range of exposure intensities an image receptor can accurately detect?

A) ionization
B) attenuation
C) dynamic range
D) dynamic imaging