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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. The effective focal spot is only 1/3 the size of the actual focal spot. this is called the
line focus principle
false
15
paresis
2. When processing film - the black areas are made of
rapidly dividing
line focus principle
metallic silver
10
3. Rotating anode
decrease scatter radiation
non-screen film
10 cm
x-rays
4. The focused grid is upside down - is one reason for
long scale of contrast
2.5
non-screen
grid cutoff
5. Another result of the 20 degree angling
heel effect
true
primary
0.5mm
6. The exact area of the anode that the electrons hit
more x-rays produced
focal spot
screen film
pneumocystogram
7. When the AgBr reacts and ionizes with light or x-rays - than at this point - What is on the film is known as the
cathode and anode
14 x 17
latent image
intussusception
8. Distance from the grid to the x-ray tube (36-40 inches)
fast
FFD
grid focus
stationary and rotating
9. Measures the power of penetrability (quality) of the x-rays produced
kVp
inflammation an granuloma
caudal border of scapula
cassette
10. Loss of movement in legs (front and/or back)
paralysis
joint mouse
potter-bucky diagram
3cc/#
11. When a body part is greater than or equal to.....you should use a grid
effective focal spot
latent image
long scale of contrast
10 cm
12. Lead equivalent for thyroid sheild
0.5mm
paralysis
false
non-screen
13. Film with: high detail - minimal graininess - increased exposure
cathode
slow film
5
electrons
14. A grid must be used on the chest if it's 11cm thick
white
false
screen film
santes' rule
15. What needs to have high levels of x-ray absorbtion
screens (phosphor layer)
0.5mm
40
unexposed AgBr
16. Is on the anode and is angled at approximately 20 degrees from vertical
direct relationship
focal spot
x-rays
AgBr
17. When more electrons hit the focal spot on the anode
joint mouse
kVp
metallic silver
more x-rays produced
18. Positive contrast agents appear what color on a radiograph
false
false
genetic damage
white
19. With the heel effect - more x-rays tend to be in the beam toward this end of the tube
white
cathode
stationary anode
inversely proportional
20. What is the term for the spotty appearance on the film due to the large crystals in the screens
cathode filament
quantum mottle
black
FFD
21. A living animal - with tissue densities such as fat - muscle - fluid - and air
long scale of contrast
2
screen film
focal spot
22. Film with: ultra speed - grainier image - less exposure needed
fast film
lines per centimeter
fast
adjustable lead shutters
23. Increase mAs and kVp in order to...
speed
increase density
fast
the sharper the radiograph
24. Is influenced by quantity of x-rays(mAs) - quality of x-rays (kVp) - type and thickness of tissue being x-rayed
visible light
unexposed AgBr
density
grey
25. The greater the number of electrons released
the higher the mA
false
inversely proportional
no contrast
26. What type of bone tumors started in the location they were first found
primary
scatter radiation
rare earth elements
large crystals - small crystals
27. What type of film has no screens or film cassettes
focal spot
non-screen
electrons
focal spot
28. NYSVMS Facility Accreditation Standards
cathode
joint mouse
NYS Public Health Law #225
clinical signs
29. Size film we use here
speed
kVp
grid cutoff
14 x 17
30. Affects both density and contrast
screens (phosphor layer)
kVp
secondary
15% rule for kVp
31. When doing a lateral radiograph of the thorax/chest - the x-ray beam should be centered over what specific anatomical landmark
caudal border of scapula
santes' rule
grid cutoff
fluoroscopy
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
the sharper the radiograph
cathode filament
14 x 17
decrease scatter radiation
33. What type of film gives more detailed radiographs but more exposure to everyone involved? (commonly used as dental film - or for extremities)
non-screen
2.5
false
focal spot
34. Has a positive charge
line focus principle
anode
screens (phosphor layer)
non-screen film
35. 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
secondary
grid
latent image
4 ft
36. If perforation is suspected - what compound do we use when radiographing
luxations
iodine
white and black are reversed
short scale of contrast
37. Is the electrical current that heats the filament
fluoroscopy
direct relationship
milliamperage
15% rule for kVp
38. Incorrect grid focus is one reason for
the sharper the radiograph
non-screen film
grid cutoff
2.5
39. With this procedure - no x-ray film is involved at all
0.25mm
latent image
3cc/#
fluoroscopy
40. For bladder cystography - we use what contrast material instead of barium
intensifying screens
cathode and anode
hypaque
non-screen
41. These cells are the most sensitive to radiation
x-rays
rapidly dividing
2
reflective layer
42. Give a 25% barium solution for upper GI series - and give At what dose?
3cc/#
grey
higher mA
erythema
43. 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
rotating anode
diskospondylitis
FFD
grid efficiency
44. Are produced when electrons are slowed down or stopped by atoms in the target area where they are aimed
focal spot
x-rays
the higher the mA
NYS Public Health Law #225
45. Radiographic signs dont always agree with what
cathode filament
clinical signs
15% rule for kVp
mAs
46. MAs for chest 1/2x =?
grid cutoff
non-screen film
2.5
false
47. Increase developing time and temp of developing fluid
mAs
false
increase density
screens (phosphor layer)
48. If there's no object in the way of an x-ray - the picture would be
non-screen
3cc/#
false
black
49. If the thorax is greater than or equal to....you should use a grid
long scale of contrast
large crystals - small crystals
cathode and anode
15 cm
50. MAs for extremities
calcium tungstate
indirect relationship
5
electrons