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Radiology > Important Info Part 3 2.1 > Flashcards

Important Info Part 3 2.1 Flashcards

1
Q

What is DICOM?

A

digital imaging and communications in medicine

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2
Q

What is the focusing cup made of?

A

molybdenum

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3
Q

What does the low voltage heat?

A

filament

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4
Q

Who first discovered the intraoral radiograph?

A

Otto Walkhoff

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5
Q

What is Bremsstrahlung radiation?

A

produced when electrons interact with atoms of the target
-head on collision with nucleus
-makes up majority of xray beam

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6
Q

Why is tungsten used as the target material?
a. low heat
b. high radiation coefficient
c. low cost

A

high radiation coefficient

(slides say..
1. high atomic number
2. high melting point
3. high thermal conductivity
4. low vapor pressure
& cheap
-haley)

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7
Q

What does rectifier do?

A

Make the alternating current into direct current

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8
Q

If the x-ray tube is set at 60 kVp, then the max voltage is..

A

60 kEV

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9
Q

What skull radiograph is used to identify growth and development?

A

lateral cephalometric

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10
Q

MPD measures threshold for ____ radiation.
a. ionizing
b. characteristic
c. photoelectric
d. comptn

A

ionizing

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11
Q

What skull radiograph is used to evaluate facial asymmetries?

A

posteroanterior cephalometric

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12
Q

Where do you place the beam for lateral maxillary occlusal projections?

A

just below the lateral canthus of the eye

(lateral cross-sectional maxillary central ray –> posterior maxilla -haley)

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13
Q

What does increasing source to object distance do?
a. decrease magnification
b. increase magnification
c. increase distortion
d. decrease distortion

A

decrease magnification

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14
Q

What radiographs do you take on a pregnant woman?

A

emergent dental care

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15
Q

What is the best radiograph for interproximal caries diagnosis?
a. a BW radiograph with open contacts
b. PA radiograph with open contacts

A

a BW radiograph with open contacts

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16
Q

What skull radiograph is used to identify the maxillary sinus?

A

waters

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17
Q

How does something that is anterior to the focal trough appear?
a. narrower
b. wider
c. round

A

narrower

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18
Q

Inverse square law: if the distance is _____ the intensity does what?

A

tripled; decreases by 9

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19
Q

Something in the focal trough is…

A

reasonably well defined

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20
Q

Compared to CCD, CMOS is…

A

faster to digitize

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21
Q

What receptor has the lowest dose?
a. CCD
b. CMOS
c. Film
d. PPS

A

CCD

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22
Q

What is located between the source and the center of rotation?

A

ghost image

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23
Q

What is true about panos?
a. multiple centers of rotation
b. cannot be used with patients with trismus

A

a. multiple centers of rotation

24
Q

What is high contrast?

A

short gray scale

25
Q

What is true about panos?
a. magnification across image is unequal
b. can diagnose caries
c. higher resolution than PA
d. higher radiation than a FMS

A

magnification across is unequal

26
Q

If you decrease voltage from 70 kVp to 60 kVp, then you:
a. decrease density, increase contrast
b. decrease density, decrease contrast
c. increase density, increase contrast
d. increase density, decrease contrast

A

decrease density, increase contrast

27
Q

What is the 2012 ADA recommendation for an adult patient at a high caries risk?

A

posterior bitewings exam at 6-18 month intervals, if proximal surfaces cannot be examined visually

28
Q

When are x-rays produced?

A

when hitting the tungsten target

29
Q

Thermionic emission does what?

A

heats up and emits electrons

30
Q

Which of the following interactions causes biological effects ?

A

compton scattering

31
Q

Low contrast means:
a. more shades of gray
b. lighter image
c. darker image
d. less shades of gray

A

more shades of gray

32
Q

_____ dose is the threshold to create a pair of ions.
a. exposure
b. effective
c. absorbed
d. equivalent

A

exposure

33
Q

What is this?

A

tuberosity

34
Q
A

coronoid process

35
Q
A

floor of nasal cavity

36
Q
A

zygomatic process of maxilla

37
Q
A

zygoma

38
Q
A

ghost image of left mandible

39
Q
A

mental ridge

40
Q
A

nutrient canal

41
Q

the broad radiolucency (hint in the molar region)

A

submandibular gland fossa

42
Q

What type of radiograph is this?

A

submentovertex skull radiograph

43
Q

(hint space between condyle and coronoid process)

A

sigmoid notch

44
Q
A

pterygoid plate

45
Q

What’s wrong with this image?

A

head turned

46
Q

What’s wrong with this image?

A

chin up

  • Flat occlusal plane or reverse curvature.
  • Roots of maxillary anterior teeth are blurred.
47
Q

What’s wrong with this image?

A

too far back

  • Anterior teeth widened and blurred
48
Q

What’s wrong with this image?

A

necklace

49
Q

What’s wrong with this image?

A

lead apron

50
Q

What is seen on #30?

A

a. Mesial cervical burnout and occlusal caries

  • idk if you can see occlusal caries on here but it is the best photo I could find
51
Q

What is true about #9 and the whole area?

A

Anterior horizontal bone loss and vertical bone defect on #9

52
Q

What kind of bone loss is this?

A

Horizontal bone loss

53
Q

What is true about the stage of bone loss?

A

Mild to moderate bone loss

54
Q

What is going on where the arrows are pointing?

A

inital caries

55
Q

What is going on with #14

A

a. Severe bone loss
b. Furcation involvement
c. Vertical bone defect
d. >5mm depth pocket

56
Q

What is the diagnosis on distal these premolars?

A

moderate caries

57
Q

What is the diagnosis on these premolars?

A

root surface caries

Radiology (35 decks)

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