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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. Loss of movement in legs (front and/or back)
5
paralysis
grey
AgBr
2. If the grid is stationary - more lines that are finer are less apt to show up on a radiograph - this is called....
movement
screens (phosphor layer)
lines per centimeter
heel effect
3. If the x-ray tube is not 36-40 inches from the grid - this is called the
heel effect
grid cutoff
annulus fibrosis
grid focus
4. Has a negative charge
cathode
cathode filament
40
true
5. If perforation is suspected - what compound do we use when radiographing
focal spot
screen film
iodine
cervical
6. Between density and kVp
direct relationship
hyperesthesia
indirect relationship
screens (phosphor layer)
7. Sheets of luminescent phorphor crystals on a cardboard or plastic base
focal spot
genetic and somatic
intensifying screens
electrons
8. 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)
mAs
intensifying screens
whiter
calcium tungstate
9. 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
4 ft
cathode
true
cathode filament
10. Is on the anode and is angled at approximately 20 degrees from vertical
kVp
focal spot
stops peristalsis
aluminum
11. Has a positive charge
anode
cathode
long scale of contrast
grid focus
12. If the kVp is increased by 15% - the density is doubled
no contrast
screen film
15% rule for kVp
kVp or mAs
13. These screens are the most common type - they give good resolution with relatively low exposure
true
osteomyelitis
medium or par
quantum mottle
14. What specific part of the eye is cloudy with a cataract
double mAs
film cassette
lens
rapidly dividing
15. Affects both density and contrast
kVp
hypaque
lead cone and adjustable lead shutters
2
16. Bone - lymphatic cells - epitheilial - and hemopoietic cells are also what kind of cell?
cathode
black
large crystals - small crystals
sensitive cells
17. The effective focal spot is only 1/3 the size of the actual focal spot. this is called the
focused and unfocused or parallel
line focus principle
anode
0.5mm
18. What type of films need a lot more x-ray exposure and more time to expose them
NYS Public Health Law #225
non-screen
white
rapidly dividing
19. Give a 25% barium solution for upper GI series - and give At what dose?
quantum mottle
3cc/#
false
density
20. If the kVp is too high
increase scatter
14 x 17
secondary
2
21. The x-ray machine we've been using has a rotating anode
lead cone and adjustable lead shutters
contrast
true
sensitive cells
22. If you use an mA of 300 - What time fraction must i use to get an mAs of 10?
1/30
2
short scale of contrast
lines per centimeter
23. A...is a series of lead strips on edge which only allow the primary x-rays - which are traveling in straight lines - reach the film
increase scatter
wobblers syndrome
grid
cathode
24. The shorter the wavelength of the x-ray - the more powerful the x-ray is
arthritis
true
screen film
10
25. AgBr + light =
screen film
intensifying screens
light source
cathode
26. If there's bone in the way of an x-ray -. those parts would be
whiter
pneumocystogram
kVp or mAs
Maximum Permissible Dose
27. Is the measurement for the maximum energy available at that setting
genetic damage
peak kilovoltage
anode
somatic damage
28. Within the collimator outlines just how much is collimated
light source
increase density
unexposed AgBr
non-screen
29. When a body part is greater than or equal to.....you should use a grid
secondary
sensitive cells
10 cm
metallic silver
30. With the heel effect - more x-rays tend to be in the beam toward this end of the tube
cathode
stationary and rotating
hyperesthesia
white and black are reversed
31. What is the difference between fluoroscopy and a regular radiograph
5
peak kilovoltage
white and black are reversed
fogging
32. They don't move - they're found in dental units and portable units - cannot withstand the heat produced from large units
stationary anode
true
primary
direct relationship
33. The 2 types of collimators are
lead cone and adjustable lead shutters
line focus principle
2
medium film
34. X-ray machines come with a set one - we cannot adjust it
effective focal spot
reflective layer
focal spot
screen film
35. Animal has broken femur - it's ideal to have How many radiographs for diagnostic purposes
2
screens (phosphor layer)
true
AgBr
36. What is the name for the cartilage flap in the shoulder joint that has broken free and is floating around in the joint fluid
pneumocystogram
peak kilovoltage
speed
joint mouse
37. Redness of the skin
fluoroscopy
10 cm
erythema
rapidly dividing
38. What type of film has no screens or film cassettes
anode
peak kilovoltage
electrons
non-screen
39. Distance from the grid to the x-ray tube (36-40 inches)
unexposed AgBr
false
somatic damage
grid focus
40. When.....collide with the anode - 99% of energy is released in the form of heat - and 1% of energy is in the form of x-rays
medium film
electrons
intensifying screens
increase scatter
41. What is one of the most common areas of occurance for spinal problems ( 85% dachshunds)
slow
thoracic(caudal) and lumbar
10
fast
42. Amount of radiation a person can recieve in a calendar year
rapidly dividing
Maximum Permissible Dose
no contrast
mAs
43. The type of collimator that we have here
focal spot
false
grid cutoff
adjustable lead shutters
44. Is the device which restricts (narrows) the beam of x-rays as they leave the x-ray machine
collimator
false
highest mA and smallest time fraction
intussusception
45. Weakness
non-screen film
paresis
radiograph
FFD
46. Is the density difference between 2 adjacent areas on a radiograph
non-screen
direct relationship
contrast
mAs
47. Dislocations or separations
speed
luxations
indirect relationship
arthritis
48. Is the source of electrons
screens (phosphor layer)
cathode
intensifying screens
decrease scatter radiation
49. Must be radiolucent
radiograph
true
film cassette
cathode
50. Is the most common artifact in radiography
medium or par
scatter radiation
movement
rapidly dividing