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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. MAs for extremities
hypaque
2
5
potter-bucky diagram
2. Is only 1/3 the size of the actual focal spot
false
effective focal spot
first trimester
non-screen film
3. Old mAs x (new FFD)2 divided by (old FFD)2
paralysis
decrease scatter radiation
cathode
inverse square law
4. The back of the cassette is made of lead to decrease....
peak kilovoltage
phosphor layer dyes
radiograph
back scatter
5. AgBr + light =
screen film
reflective layer
Maximum Permissible Dose
true
6. What type of films need a lot more x-ray exposure and more time to expose them
reflective layer
more x-rays produced
non-screen
afterglow
7. The distance from the x-ray tube to the x-ray machine is the SID (source image distance) - or the FFD (also known as....)
grid cutoff
radiograph
short scale of contrast
focal film distance
8. Can cause damage to living cells through the process of excitation or ionization of electrons in the orbits around atoms
intussusception
inverse square law
x-rays
movement
9. This is inversely proportional to screen speed
radiographic detail
potter-bucky diagram
15% rule for kVp
increase density
10. KVp=(2x thickness of body part in cm) + 40
11. They don't move - they're found in dental units and portable units - cannot withstand the heat produced from large units
focal film distance
fluoroscopy
stationary anode
clinical signs
12. Lead equivalent for thyroid sheild
0.5mm
aluminum
false
5
13. Film with: high detail - minimal graininess - increased exposure
slow film
fast film
milliamperage
fluoroscopy
14. These cells are the most sensitive to radiation
genetic and somatic
decrease scatter radiation
visible light
rapidly dividing
15. The efficiency of this reflects light made by phosphors back towards the film
more light
focused and unfocused or parallel
reflective layer
5
16. As this increases - the intensity of the x-ray beam decreases - so the beam intensity increases - and the mAs must decrease to compensate
FFD
calcium tungstate
peak kilovoltage
higher mA
17. This gives you the desired mAs - and it gives less time for your patient to move
true
white and black are reversed
peak kilovoltage
highest mA and smallest time fraction
18. Types of grids
double contrast
fogging
false
focused and unfocused or parallel
19. What is the term for an unknown cause
film cassette
focal spot
idiopathic
milliamperage
20. Screens are classified according to
false
focal film distance
speed
caudal border of scapula
21. If there's bone in the way of an x-ray -. those parts would be
paralysis
whiter
milliamperage
large crystals - small crystals
22. For bladder cystography - we use what contrast material instead of barium
false
hypaque
nucleus pulposis
anode
23. What needs to have high levels of x-ray to light conversion with the correct energy and color for the type of film used
anode
FFD
rotating anode
screens (phosphor layer)
24. Is the source of electrons
rare earth elements
radiographic detail
cathode
increase scatter
25. Lung tissue appears black (radiolucent) on a radiograph
osteomyelitis
more light
primary
true
26. When processing film - the black areas are made of
metallic silver
true
diskospondylitis
phosphor layer dyes
27. What is one of the most common areas of occurance for spinal problems ( 85% dachshunds)
thoracic(caudal) and lumbar
slow
iodine
short scale of contrast
28. Safe Operating Procedures
true
SOP
wide latitude film
white and black are reversed
29. MAs for chest 1/2x =?
4 ft
somatic damage
2.5
hyperesthesia
30. We ideally take a radiograph of the abdomen at the peak of inspiration
false
nucleus pulposis
rare earth elements
x-rays
31. Sheets of luminescent phosphor crystals bound together and mounted on a cardboard or plastic base
screen film
silver halide
intensifying screens
focal spot
32. 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
decrease scatter radiation
white and black are reversed
latent image
33. When more electrons hit the focal spot on the anode
grid cutoff
10 cm
more x-rays produced
mAs
34. If the kVp is increased by 15% - the density is doubled
true
false
movement
15% rule for kVp
35. X-ray machines come with a set one - we cannot adjust it
non-screen
lines per centimeter
non-screen
focal spot
36. Another result of the 20 degree angling
cathode and anode
intensifying screens
screens (phosphor layer)
heel effect
37. Growth - gonadal - neoplastic - and metabolically active cells are what kind of cells
abnormalities
grid efficiency
rapidly dividing
grey
38. 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
the higher the mA
slow film
x-rays
rotating anode
39. Compound of silver and bromine - chlorine - or iodine - all of which are in the halogen group of elements
the higher the mA
non-screen
osteomyelitis
silver halide
40. In the dark room - the safe light (red light) needs to be at least how far away from the loading bench
4 ft
caudal border of scapula
unexposed AgBr
10 cm
41. A grid must be used on the chest if it's 11cm thick
false
radiograph
slow
15% rule for kVp
42. Increase mAs and kVp in order to...
increase density
cathode
mAs
Maximum Permissible Dose
43. Redness of the skin
false
erythema
0.25mm
stationary and rotating
44. Types of cell damage
genetic and somatic
SOP
grid
white
45. Is to the left - electrons bounce off it at a 20 degree angle
false
paresis
anode
FFD
46. White against black - like the x-ray of a plain skeleton
effective focal spot
black
short scale of contrast
true
47. AgBr + x-rays =
inversely proportional
cathode
non-screen film
anode
48. Is responsible for the number or quantity of x-rays
non-screen
adjustable lead shutters
arthritis
mAs
49. Must increase.....to compensate for x-ray absorption by the grid. (we triple our mAs)
density
erythema
kVp or mAs
the sharper the radiograph
50. Radiographic signs dont always agree with what
focused and unfocused or parallel
highest mA and smallest time fraction
clinical signs
first trimester