Image Production practice quiz

Question 1

Which of the following factors will provide the least amount of receptor exposure?

a.) 75 kvp, 200 ma, 200 ms, 40’’ SID, large FSS, 2.5mm filtration
b.) 60 kvp, 600 ma, 0.025 s, 72” SID, small FSS, 1mm filtration
c.) 70 kvp, 600 ma, 0.25 s, 40’’ SID, small FSS, 2mm filtration
d.) 60 kvp, 300 ma, 150 ms, 72” SID, large FSS, 2mm filtration

Answer 1

b.) 60 kvp, 600 mA, 0.025 s, 72” SID, small FSS, 1mm filtration

Question 2

What is the primary factor that influences contrast in digital imaging?

a.) KVP
b.) smoothing
c.) look up table
d.) histogram

Answer 2

c.) look up table

Question 3

Decreased patient thickness results in:
1.) increased IR exposure
2.) increased heel effect
3.) decreased distortion
4.) higher image contrast

a.) 1 and 4 only
b.) 1, 2, 3 and 4
c.) 1 only
d.) 1, 3, and 4only

Answer 3

d.) 1, 3 and 4 only

Question 4

Which of the following factors will provide the highest contrast?

a.) 60 kvp, 300 ma, 150 ms, 72” SID, large FSS 2mm filtration
b.) 75 kvp, 200 ma, 200 ms, 40” SID, large FSS, 2.5 mm filtration
c.) 70 kvp, 600 ma, 0.25 s, 40” SID, small FSS, 2 mm filtration
d.) 60 kvp, 600 ma, 0.025 s, 72” SID, small FSS, 1 mm filtration

Answer 4

d.) 60 kvp, 600 ma, 0.025 s, 72” SID, small FSS, 1mm filtration

Question 5

Foreshortening can be caused by:

a.) excessive distance between the focus and the IR
b.) insufficient distance between the focus and the IR
c.) excessice distance between the object to the IR
d.) the radiographic object being placed at an angle to the IR

Answer 5

d.) the radiographic object being placed at an angle to the IR

Question 6

Which of the following are factors that affect contrast in digital imaging?
1.) ma and or time
2.) windowing
3.) kvp
4.) pacs
5.) look up table

a.) 3 only
b.) 3 and 5 only
c.) 2, 3, 4 and 5 only
d.) all choices are responsible for image contrast
e.) 2, 3 and 5 only

Answer 6

e.) 2, 3 and 5 only

Question 7

How does adding filtration to the xray tube assembly change the characteristcis of the xray beam?

a.) increases quantity, increases quality
b.) decreases quantity, increases quality
c.) decreases quantity, decreases quality
d.) increases quantity, decreases quality

Answer 7

b.) decreases quantity, increases quality

Question 8

Xray beam intensity is a term describing the:

a.) frequency of photons
b.) number of photons
c.) average energy of photons
d.) maximum energy of photons

Answer 8

b.) number of photons

Question 9

small anode target angles result in which of the following?

a.) increases heat capacity
b.) less heel effect
c.) small focal spot size
d.) better collimation

Answer 9

c.) small focal spot size

Question 10

An image demonstrating many brightness levels or shades of gray, with only slight differences between the levels/shades is said to posses:
1.) long scale contrast
2.) low contrast
3.) short scale contrast

a.) 2 only
b.) 1 and 2 only
c.) 1 only
d.) 2 and 3 only

Answer 10

b.) 1 and 2 only

Question 11

Which of the following contribute to subject contrast?

a.) effective atomic number
b.) differences in tissue density
c.) differences in tissue thickness
d.) all are correct

Answer 11

d.) all are correct

Question 12

An increased focal spot size will:
1.) increase IR exposure
2.) decrease spatial resolution
3.) increase spatial resolution
4.) increase distortion
5.) decrease contrast

a.) 1 and 2 only
b.) 2 only
c.) 1, 2, 4 and 5 only
d.) 1, 2 and 3 only

Answer 12

b.) 2 only

Question 13

Good collimation practices will do all of the following except:

a.) decrease radiation dose
b.) reduce visibility of recorded detail
c.) all options are correct
d.) affect the amount of scatter that reaches the IR

Answer 13

b.) reduce visibility of recorded detail

Question 14

Appropriate scatter radiation control methods include which of the following?
1.) tight collimation
2.) lead masking at the edge of the exposure field
3.) appropriate use of a grid
4.) lower mA settings
5.) using an air gap method

a.) 1, 2, 3 and 5 only
b.) 1, 2 and 4 only
c.) 1, 2, 3, 4 and 5
d.) 2, 3 and 5 only

Answer 14

a.) 1, 2, 3 and 5 only

Question 15

Increasing the anode angle will:
1.) decrease the anode heel effect
2.) increase the anode heel effect
3.) decrease IR exposure
4.) increase IR exposure

a.) 1 and 4 only
b.) 2 and 3 only
c.) 2 and 4only
d.) 1 only

Answer 15

a.) 1 and 4 only

Question 16

mAs controls the ______________ of photons in the xray beam

a.) inertia
b.) quantity
c.) quality
d.) penetrating power

Answer 16

b.) quantity

Question 17

Which of the following will decrease the production of scatter

a.) decreasing FOV
b.) increasing FOV
c.) increasing grid ratio
d.) decreasing mAs

Answer 17

a.) decreasing FOV

Question 18

Which of the following matrices would produce the greatest spatial resolution?

a.) 3076 x3076
b.) 2048 x 2048
c.) 248 x 248
d.) 1024 x 1024

Answer 18

a.) 3076 x 3076

Question 19

Saturation indicates:

a.) quantam mottle
b.) underexposure to the IR
c.) overexposure to the IR
d.) fog

Answer 19

c.) overexposure to the IR

Question 20

The primary cause of scatter radiation that strikes the IR is from:

a.) grid cut off
b.) excessive collimation
c.) the patient
d.) photoelectric interactions

Answer 20

c.) the patient

Question 21

If there were no contrast in a radiograph, the image would include:

a.) light gray and dark gray
b.) only the same shade of gray
c.) black and white
d.) black and light gray

Answer 21

b.) only the same shade of gray

Question 22

All of the following are related to spatial resolution except:

a.) milliamperage
b.) OID
c.) SID
d.) focal spot size

Answer 22

a.) milliamperage

Question 23

In radiography of a large abdomen, which of the following is/are effective ways to minimize the amount of scattered radiation reaching the IR?
1.) close collimation
2.) use of low mas
3.) removing the grid

a.) 1 only
b.) 1 and 2
c.) 1 and 3
d.) 1, 2 and 3

Answer 23

a.) 1 only

Question 24

According to the NCRP regulations, leakage radiation from the xray tube must not exceed:

a.) 1.0 mgy/h (100 mr/h
b.) 0.1 mgy/h (10 mr/h)
c.) 1.0 mgy/min (100 mr/min)
d.) 0.1 mgy/min (10mr/min)

Answer 24

a.) 1.0 mgy/h (100 mr/h)

Question 25

Which of the following combinations would result in an image with the least amount of magnification?

a.) increased OID and increased SID
b.) increased OID and decreased SID
c.) decreased OID and decreased source to image receptor distance (SID)
d.) decreased OID and increased SID

Answer 25

d.) decreased OID and increased SID

Question 26

Which of the following exposure factors controls the energy of the xray beam?

a.) kvp
b.) exposure time
c.) mas
d.) filtration

Answer 26

a.) kvp

Question 27

Decreasing mas will:

a.) decrease IR exposure
b.) decrease spatial resolution
c.) increase contrast
d.) increase IR exposure

Answer 27

a.) decrease IR exposure

Question 28

An increase in the iamge size of an object compared with its true or actual size is called:

a.) sharpness distortion
b.) size distortion
c.) minification
d.) shape distortion

Answer 28

b.) size distortion

Question 29

Shape distortion is caused by:

a.) angling the patient
b.) increasing the OID
c.) all choices cause shape distortion
d.) angling the tube and angling the patient
e.) angling the xray tube

Answer 29

d.) angling the tube and angling the patient

Question 30

The passage of radiation through matter without interactions is describes as:

a.) attenuation
b.) transmission
c.) absorption
d.) scatter

Answer 30

b.) transmission

Question 31

Which of the following factors affect image contrast? choose all that apply

a.) mas
b.) collimation
c.) focal spot size
d.) OID
e.) kvp
f.) patient factors
g.) scatter
h.) motion
I.) grid ratio
j.) anode heel effect

Answer 31

b.) collimation
d.) OID
e.) kvp
f.) patient factors
g.) scatter
i.) grid ratio

Question 32

Scatter radiation reduces radiographic quality by changing:

a.) optical density
b.) contrast
c.) distoriton
d.) blurring

Answer 32

b.) contrast

Question 33

Which of the following is not a type of beam limiting restrictor?

a.) cylinder
b.) PBL
c.) aperture diaphragm
d.) lead sheild

Answer 33

d.) lead sheild

Question 34

Put the following items in order from what occurs 1st to what occurs last:

1.) primary beam
2.) attenuation
3.) remnant beam
4.) latent image
5.) manifest image

Answer 34

1.) primary beam
2.) attenuation
3.) remnant beam
4.) latent image
5.) manifest image

Question 35

Exposure factors of 90 kvp and 17 mas are used for a particular nongrid exposure. What should be the new mas value if a 12:1 grid is added?

a.) 85
b.) 15
c.) 12
d.) 9

Answer 35

a.) 85

Question 36

How does an increase of 25 mas to 50 mas affect xray beam quality?

a.) decreases quality
b.) it has no effect
c.) it depends on the focal spot size
d.) increases quality

Answer 36

b.) it has no effect

Question 37

Misalignment of the tube part IR relationship results in:

a.) magnification
b.) blur
c.) size distortion
d.) shape distortion

Answer 37

d.) shape distortion

Question 38

Which of the following factors have an affect on image receptor exposure?

a.) SID
b.) patient factors
c.) tube, ir and or patient angle
d.) kvp
e.) filtration
f.) motion
g.) focal spot size
h.) mas

Answer 38

a.) SID
b.) patient factors
d.) kvp
e.) filtration
h.) mas

Question 39

the main purpose of a grid it to absorb scatter, and decrease patient dose.

a.) true
b.) false

Answer 39

b.) false

Question 40

As mas increases, quality:

a.) is unaffected
b.) decreases
c.) increases by a factor of 4
d.) increases

Answer 40

a.) is unaffected

Question 41

What are the effects of scattered radiation on a radiographic image?
1.) it produces radiographic fog
2.) decreased image contrast
3.) it produces quantam mottle

a.) 1 only
b.) 2 only
c.) 1, 2 and 3
d.) 1 and 2 only

Answer 41

d.) 1 and 2 only

Question 42

The heel effect occurs because of:

a.) the shape charge effect
b.) the shape of the filament
c.) xray absorption in the anode
d.) reduced tube current
e.) a focusing cup

Answer 42

c.) xray absorption in the anode

Question 43

Compared with a low ratio grid, a high ratio grid will:

1.) allow more centering latitude
2.) absorb more scattered radiation
3.) absorb more primary radiaiton

a.) 1 and 2
b.) 1, 2 and 3
c.) 2 and 3
d.) 1 only

Answer 43

c.) 2 and 3

Question 44

Decreasing beam restriction has no effect on patient dose:

a.) true
b.) false

Answer 44

b.) false

Question 45

As kvp increases, scatter radiation will:

a.) increase because of more compton interaction
b.) remain unchanged
c.) decrease because of less photoelectric interaction
d.) decrease because of less compton interactions

Answer 45

a.) increase because of more compton interaction

Question 46

a measure of the ability of a system to display contrast of anatomic objects varying in size describes.

a.) DQE
b.) FOV
c.) MTF
d.) OID

Answer 46

c.) MTF

Question 47

Aluminum filtration has its greatest effect on:

a.) low energy xray photons
b.) high energy scattered photons
c.) high energy xray photons
d.) low energy scattered photons

Answer 47

a.) low energy xray photons

Question 48

What is a digital process that adjusts the original histogram of an image to match the expected histogram?

a.) rescaling
b.) edge enhancement
c.) smoothing
d.) DICOM

Answer 48

a.) rescaling

Question 49

A decrease in kilovoltage will result in:

1.) a decrease in image resolution
2.) a decrease in photon energy
3.) a decrease in receptor exposure

a.) 1 and 2 only
b.) 1 only
c.) 1, 2 and 3
d.) 2 and 3 only

Answer 49

d.) 2 and 3 only

Question 50

The greatest detail sharpness is obtained by using:
1.) a small focal spot
2.) the longest SID
3.) the smallest OID
4.) longer exposure times

a.) 1, 2, 3 and 4
b.) 4 only
c.) 1, 2 and 3
d.) 1 only

Answer 50

c.) 1, 2 and 3