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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. An invisible image on the x-ray film Which becomes visible after it has been processed in the manual or automatic processor
long scale of contrast
grid
latent image
NYS Public Health Law #225
2. The electrical current sent through the filament to cause this electron release is called
the higher the mA
heel effect
milliamperage
more x-rays produced
3. A layer of intensifying screen that reflects the light from the phosphor layer toward the film
non-screen
reflective layer
iodine
lead cone and adjustable lead shutters
4. Is determined by the ratio of the height of the lead strips to the distance between them
secondary
grid efficiency
fast
clinical signs
5. Grid helps reduce the amount of......
decrease scatter radiation
highest mA and smallest time fraction
somatic damage
scatter radiation
6. Positive contrast agents appear what color on a radiograph
screens (phosphor layer)
white
sensitive cells
wide latitude film
7. Is on the anode and is angled at approximately 20 degrees from vertical
true
slow film
double mAs
focal spot
8. Is the source of electrons
aluminum
metallic silver
cathode
AgBr
9. The effective focal spot is approximately 1/3 the size of the actual focal spot
2
focal spot
true
decrease scatter radiation
10. Incorrect grid focus is one reason for
cathode
annulus fibrosis
grid cutoff
increase density
11. What is the term for the spotty appearance on the film due to the large crystals in the screens
phosphor layer
quantum mottle
movement
erythema
12. Ideally is very small
reflective layer
osteomyelitis
focal spot
0.5mm
13. Film that is more sensitive to ionizing radiation than to fluorescent light
sensitive cells
mAs
non-screen film
peak kilovoltage
14. A lightproof encasement designed to hold x-ray film and intensifying screens in close contact
true
slow
cassette
non-screen film
15. Size film we use here
non-screen
the higher the mA
highest mA and smallest time fraction
14 x 17
16. For bladder cystography - we use what contrast material instead of barium
erythema
nucleus pulposis
hypaque
5
17. Negative contrast agents appear what color on a radiograph
inverse square law
black
x-rays
idiopathic
18. Bone - lymphatic cells - epitheilial - and hemopoietic cells are also what kind of cell?
stationary anode
hyperesthesia
grid
sensitive cells
19. The x-ray machine we've been using has a rotating anode
metallic silver
x-rays
SOP
true
20. Calcium 'bridges' between adjacent vertebrae
narrow latitude film
14 x 17
focused and unfocused or parallel
spondylosis
21. Amount of radiation a person can recieve in a calendar year
medium film
rapidly dividing
grid efficiency
Maximum Permissible Dose
22. Is the most common artifact in radiography
movement
latent image
increase scatter
higher mA
23. A device that moves the grid back and forth under the table. it helps to prevent grid lines from showing
stationary and rotating
highest mA and smallest time fraction
potter-bucky diagram
mAs
24. Pigments tend to decrease the lateral spread of light so there is increased detail
metallic silver
latent image
phosphor layer dyes
unexposed AgBr
25. Is to the left - electrons bounce off it at a 20 degree angle
10 cm
first trimester
anode
stationary anode
26. MAs for abdomen (standard mAs) x=?
supercoat
higher mA
5
focal spot
27. What type of film has the x-rays directly cause the latent image to be formed
hyperesthesia
joint mouse
non-screen
10 cm
28. Lung tissue appears black (radiolucent) on a radiograph
true
high contrast
4 ft
kVp
29. KVp=(2x thickness of body part in cm) + 40
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183
30. Is the electrical current that heats the filament
milliamperage
2
fogging
decrease scatter radiation
31. The 2 types of collimators are
lead cone and adjustable lead shutters
true
medium film
false
32. MAs for bone views (pelvis - skull - spine) 2x =?
anode
2.5
false
10
33. Is only 1/3 the size of the actual focal spot
arthritis
slow film
effective focal spot
black
34. Areas on film that should be black but come out grey - due to storage
medium or par
fogging
screens (phosphor layer)
fast film
35. Calcium tungstate - rare earth elements
15% rule for kVp
inflammation an granuloma
phosphor type
indirect relationship
36. X-ray machines come with a set one - we cannot adjust it
true
long scale of contrast
focal spot
visible light
37. Types of grids
focused and unfocused or parallel
cathode filament
true
contrast
38. Weakness
paresis
diskospondylitis
rapidly dividing
mAs
39. Rotating anode
decrease scatter radiation
10
NYS Public Health Law #225
direct relationship
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
joint mouse
electrons
grid cutoff
cathode
41. Means more electrons will be released from the filament and directed at the anode
false
higher mA
density
caudal border of scapula
42. The layer of the film where the action occurs
Maximum Permissible Dose
unexposed AgBr
focal spot
AgBr
43. Screen speed is.....to the exposure required to cause it to flouresce
inflammation an granuloma
4 ft
heel effect
inversely proportional
44. Compound of silver and bromine - chlorine - or iodine - all of which are in the halogen group of elements
fluoroscopy
silver halide
grid efficiency
supercoat
45. The distance from the x-ray tube to the x-ray machine is the SID (source image distance) - or the FFD (also known as....)
no contrast
movement
focal film distance
joint mouse
46. Is to the right - it produces the electrons
non-screen film
cathode
5
non-screen
47. Between density and mAs
fluoroscopy
phosphor layer
rapidly dividing
direct relationship
48. As this increases - the intensity of the x-ray beam decreases - so the beam intensity increases - and the mAs must decrease to compensate
FFD
non-screen
hypaque
cathode
49. What is the difference between fluoroscopy and a regular radiograph
lens
white and black are reversed
density
spondylosis
50. General purpose film - forgiving
x-rays
true
phosphor layer dyes
wide latitude film