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Test your basic knowledge |
Radiology
Start Test
Study First
Subjects
:
health-sciences
,
radiology
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. KVp=(2x thickness of body part in cm) + 40
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2. This is caused by mutations in gonadal cells - not seen until offspring are produced - mutations are not always bad
latent image
genetic damage
cathode and anode
reflective layer
3. Radiographic signs dont always agree with what
clinical signs
afterglow
dosimeter
inflammation an granuloma
4. The electrical current sent through the filament to cause this electron release is called
milliamperage
effective focal spot
phosphor layer dyes
radiographic detail
5. If the kVp is increased by 15% - the density is doubled
x-rays
radiograph
15% rule for kVp
quantum mottle
6. Film that is more sensitive to ionizing radiation than to fluorescent light
false
electrons
hyperesthesia
non-screen film
7. Screen speed is.....to the exposure required to cause it to flouresce
radiograph
quantum mottle
inversely proportional
grid
8. Affects both density and contrast
sensitive cells
paralysis
kVp
mAs
9. Most commonly used film - compromise between graininess and speed (detail)
medium film
screen film
2.5
more x-rays produced
10. The tendency of a luminescent compound to continue to give off light after x-radiation has stopped
kVp
lens
afterglow
inverse square law
11. Bone infection - also known as spondylitis
osteomyelitis
heel effect
film cassette
erythema
12. These cells are the most sensitive to radiation
silver halide
non-screen
rapidly dividing
false
13. With the heel effect - more x-rays tend to be produced toward the cathode end
false
true
contrast
back scatter
14. Is the measurement for the maximum energy available at that setting
15% rule for kVp
inverse square law
peak kilovoltage
hypaque
15. What type of bone tumors started in the location they were first found
adjustable lead shutters
primary
4 ft
diskospondylitis
16. Is responsible for the number or quantity of x-rays
white
osteomyelitis
mAs
electrons
17. Increased crystal size.....
more light
focused and unfocused or parallel
double contrast
mAs
18. MAs for chest 1/2x =?
2.5
first trimester
joint mouse
focal spot
19. If the thorax is greater than or equal to....you should use a grid
erythema
kVp or mAs
idiopathic
15 cm
20. A type of electromagnetic radiation which have a shorter wavelength than visible light
milliamperage
white and black are reversed
x-rays
santes' rule
21. When this is exposed to x-rays - it will absorb photons (quanta) and give off photons of visible light which the film is sensitive to (give off blue light)
collimator
caudal border of scapula
grid cutoff
calcium tungstate
22. Old mAs x (new FFD)2 divided by (old FFD)2
increase scatter
alopecia
lines per centimeter
inverse square law
23. These screens have increased definition/detail - need to have increased radiation exposure
slow film
slow
medium film
fluoroscopy
24. Improper centering of grid is one reason for
focal spot
1/30
15 cm
grid cutoff
25. Can cause damage to living cells through the process of excitation or ionization of electrons in the orbits around atoms
x-rays
milliamperage
2
genetic and somatic
26. Must increase.....to compensate for x-ray absorption by the grid. (we triple our mAs)
latent image
kVp or mAs
1/30
true
27. Is the device which restricts (narrows) the beam of x-rays as they leave the x-ray machine
hyperesthesia
collimator
fogging
increase scatter
28. Faster screens/less detail; slower screens/more detail
large crystals - small crystals
x-rays
luxations
0.25mm
29. Sheets of luminescent phosphor crystals bound together and mounted on a cardboard or plastic base
intensifying screens
false
the sharper the radiograph
cathode
30. Another result of the 20 degree angling
wobblers syndrome
cassette
heel effect
cathode
31. Hairloss or baldness
speed
alopecia
supercoat
milliamperage
32. We ideally take a radiograph of the abdomen at the peak of inspiration
screen film
decrease scatter radiation
false
rare earth elements
33. There are......intensifying screens within a cassette
paresis
density
2
10 cm
34. Calcium 'bridges' between adjacent vertebrae
spondylosis
true
alopecia
fogging
35. Film with: high detail - minimal graininess - increased exposure
cathode
iodine
phosphor type
slow film
36. The efficiency of this reflects light made by phosphors back towards the film
2
phosphor layer dyes
reflective layer
idiopathic
37. If there's metal in the way of an x-ray - than no x-rays will get through and that part would be
x-rays
cervical
white
hyperesthesia
38. To double the density
cathode
wobblers syndrome
double mAs
stationary and rotating
39. Has a positive charge
anode
back scatter
10 cm
grid focus
40. What is the term for an unknown cause
5
hypaque
idiopathic
NYS Public Health Law #225
41. Does move - has disks that rotate at high speeds - this helps spread out the heat that's produced as the electrons hit the focal spot
adjustable lead shutters
intensifying screens
rotating anode
fogging
42. What is the term for the spotty appearance on the film due to the large crystals in the screens
15
rapidly dividing
quantum mottle
more light
43. Distance from the grid to the x-ray tube (36-40 inches)
non-screen
film cassette
grid cutoff
grid focus
44. Increase mAs and kVp in order to...
metallic silver
increase density
double contrast
reflective layer
45. What type of film has no screens or film cassettes
non-screen
idiopathic
lead cone and adjustable lead shutters
wobblers syndrome
46. Is located in a focusing cup made of molybdenum which has a high melting point and helps to direct the electrons produced toward the cathode
cathode filament
double contrast
x-rays
anode
47. A device that moves the grid back and forth under the table. it helps to prevent grid lines from showing
caudal border of scapula
kVp or mAs
potter-bucky diagram
milliamperage
48. A lightproof encasement designed to hold x-ray film and intensifying screens in close contact
cervical
non-screen
the sharper the radiograph
cassette
49. These crystals will turn white/clear when processing film
unexposed AgBr
false
increase scatter
non-screen
50. Animal has broken femur - it's ideal to have How many radiographs for diagnostic purposes
stationary anode
2
cassette
inverse square law