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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 approximately 1/3 the size of the actual focal spot
lines per centimeter
double contrast
true
decrease scatter radiation
2. Less forgiving - high contrast - cannot tolerate changes in exposure or processing
narrow latitude film
14 x 17
light source
somatic damage
3. Film with: high detail - minimal graininess - increased exposure
intensifying screens
slow film
heel effect
wide latitude film
4. Is the device which restricts (narrows) the beam of x-rays as they leave the x-ray machine
collimator
false
rapidly dividing
screens (phosphor layer)
5. If barium leaks into the abdomen or lungs - it can cause what
decrease scatter radiation
cervical
inflammation an granuloma
long scale of contrast
6. Is only 1/3 the size of the actual focal spot
somatic damage
medium film
density
effective focal spot
7. The picture formed after the film has been exposed to x-rays and then processed into a visible image.
0.25mm
radiograph
grid cutoff
large crystals - small crystals
8. Is determined by the ratio of the height of the lead strips to the distance between them
latent image
milliamperage
14 x 17
grid efficiency
9. The effective focal spot is only 1/3 the size of the actual focal spot. this is called the
NYS Public Health Law #225
joint mouse
line focus principle
non-screen film
10. As this increases - the intensity of the x-ray beam decreases - so the beam intensity increases - and the mAs must decrease to compensate
mAs
FFD
diskospondylitis
false
11. Calcium 'bridges' between adjacent vertebrae
spondylosis
non-screen film
light source
rapidly dividing
12. If the x-ray tube is not 36-40 inches from the grid - this is called the
dosimeter
1/30
grid focus
grid cutoff
13. The tendency of a luminescent compound to continue to give off light after x-radiation has stopped
hyperesthesia
afterglow
stops peristalsis
movement
14. Has a filament made of tungsten - due to the high melting point
kVp
pneumocystogram
cathode and anode
stationary and rotating
15. If there's metal in the way of an x-ray - than no x-rays will get through and that part would be
white
x-rays
false
2
16. A clear protective layer on radiographic film
supercoat
effective focal spot
density
screens (phosphor layer)
17. Film with silver crystals that is more sensitive to fluorescent light emitted from intensifying screens than to ionizing radiation
x-rays
screen film
phosphor type
fast film
18. This is inversely proportional to screen speed
screens (phosphor layer)
false
film cassette
radiographic detail
19. On a lateral view of the chest the aorta is dorsal to the caudal vena cava
large crystals - small crystals
back scatter
electrons
true
20. Growth - gonadal - neoplastic - and metabolically active cells are what kind of cells
no contrast
grid cutoff
rapidly dividing
heel effect
21. What gives off 4 times the amount of light photons than does the calcium tungstate (it gives off green light)
rare earth elements
grid focus
iodine
non-screen film
22. 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)
peak kilovoltage
contrast
calcium tungstate
non-screen
23. What is the term for when the animal's bowel engulfs a piece of bowel distal to it - causing blockage
cathode
intussusception
6 ft
cathode
24. Another result of the 20 degree angling
focal spot
medium or par
6 ft
heel effect
25. Hairloss or baldness
line focus principle
lead cone and adjustable lead shutters
alopecia
density
26. This number in santes' rule refers to the distance the x-ray tube is from the x-ray film
40
grey
x-rays
radiographic detail
27. What is the term for a negative contrast cystogram where we inject air
focal spot
fast
medium film
pneumocystogram
28. A living animal - with tissue densities such as fat - muscle - fluid - and air
white
density
highest mA and smallest time fraction
long scale of contrast
29. Tilting of the tube or grid is one reason for
grid cutoff
back scatter
long scale of contrast
radiograph
30. To double the density
grid cutoff
double mAs
aluminum
x-rays
31. What type of film gives more detailed radiographs but more exposure to everyone involved? (commonly used as dental film - or for extremities)
non-screen
screens (phosphor layer)
lens
white and black are reversed
32. Distance from the grid to the x-ray tube (36-40 inches)
black
focused and unfocused or parallel
grid focus
black
33. Are produced when electrons are slowed down or stopped by atoms in the target area where they are aimed
electrons
santes' rule
double mAs
x-rays
34. When processing film - the black areas are made of
focused and unfocused or parallel
Maximum Permissible Dose
metallic silver
primary
35. Must increase.....to compensate for x-ray absorption by the grid. (we triple our mAs)
x-rays
focal spot
spondylosis
kVp or mAs
36. The smaller the focal spot
cassette
FFD
inflammation an granuloma
the sharper the radiograph
37. Extra pain is also called
hyperesthesia
iodine
reflective layer
decrease scatter radiation
38. Sheets of luminescent phosphor crystals bound together and mounted on a cardboard or plastic base
x-rays
intensifying screens
santes' rule
3cc/#
39. With this procedure - no x-ray film is involved at all
fluoroscopy
genetic and somatic
slow
clinical signs
40. What are the 2 types of anodes
paralysis
intussusception
stationary and rotating
grid efficiency
41. Longer wavelengths of electromagnetic radiation have more penetrating power
inverse square law
black
15% rule for kVp
false
42. Screens are classified according to
line focus principle
unexposed AgBr
aluminum
speed
43. What type of films need a lot more x-ray exposure and more time to expose them
rapidly dividing
density
15% rule for kVp
non-screen
44. What needs to have high levels of x-ray absorbtion
silver halide
screens (phosphor layer)
focal spot
1/30
45. Is to the left - electrons bounce off it at a 20 degree angle
decrease scatter radiation
false
grid focus
anode
46. They don't move - they're found in dental units and portable units - cannot withstand the heat produced from large units
inflammation an granuloma
stationary and rotating
stationary anode
primary
47. Dislocations or separations
luxations
focal spot
nucleus pulposis
contrast
48. Grid helps reduce the amount of......
5
10 cm
scatter radiation
fogging
49. Cassettes can be made of.....Which is the type here - or they can be made of magnesium - vinyl - etc
fast
fast film
grid cutoff
aluminum
50. MAs for ANY part - when using a grid 3x= ?
grey
speed
stationary and rotating
15
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