Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Oral Radiology > Sensory Placement & Beam Positioning Problems > Flashcards

Sensory Placement & Beam Positioning Problems Flashcards

1
Q

PSP:

A

Phosphor storage plate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

CCD:

A

Charge coupling device

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

CMOS:

A

Complementary metal oxide semiconductor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Shadow casting principles include:

A
  1. beam angulation
  2. receptor placement
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Miscellaneous technique problems include:

A
  1. phalangioma
  2. movement
  3. sensor placement
  4. beam angulation - horizontal
  5. beam angulation - vertial
  6. PID/BID alignment
  7. sensor wire placement
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Miscellaneous technique problems related ONLY to PSP & Film images:

A
  1. sensor bending
  2. sensor creasing
  3. double exposure
  4. reverse placement
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Caused when patients finger is positioned infront of the sensor:

A

Phalangioma (look for finger bone)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Caused when patient or X-ray tube head moves during exposure:

A

Movement (causes blurry)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Lateral centered with open mesial contact:

A

Lateral incisor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Canine & 1st premolar centered with open contact:

A

Canine/premolar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Anterior receptor edge to middle of canine:

A

Maxillary/mandibular premolar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Anterior receptor edge to middle of 2nd premolar:

A

Maxillary/mandibular molar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

For an anterior bitewing the anterior plate edge should be:

A

To middle of most anterior canine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

For anterior bitewing, the receptor must be:

A

Parallel to the teeth of interest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

For a vertical bitewing, the anterior receptor edge is at the:

A

mesial of mandibular first molar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Sensor placement is more critical with:

A

solid-state sensors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Why is sensor placement more critical with solid-state sensors?

A

there is a small active image capture area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What type of image is being shown?

A

Bitewing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What type of image is being shown?

A

Periapical image

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

For a maxillary premolar PA the receptor parallels _____ & ____ of premolars as well as the ______ of premolars

A

Buccal & lingual planes; long axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Anterior edge of receptor includes distal 1/2 of canine, the premolars & some of molars:

A

Maxillary premolar PA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

For a maxillary premolar PA, the horizontal angle is directed through:

A

distal of canine/premolar, premolar/premolar & the second premolar/molar contacts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

distal of canine/premolar, premolar/premolar & the second premolar/molar contacts

This is the horizontal angle for:

A

maxillary premolar PA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

For a maxillary molar PA, the receptor parallels ___ of molars as well as _____ of molars

A

Buccal & lingual planes; long axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Anterior edge of receptor includes distal 1/2 of second premolar and as much of the molars as possible:

A

Maxillary molar PA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

For a maxillary molar PA, the horizontal angle is directed through:

A

distal of 2nd premolar/1st molar and the intermolar contacts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

distal of 2nd premolar/1st molar and the intermolar contacts

This is the horizontal angle for:

A

Maxillary molar PA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

For a premolar bitewing the receptor parallels _____ of premolars as well as _____ of premolars

A

Buccal & lingual planes; long axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Anterior edge of receptor include mesial 1/2 of canine, the premolars and some of the molars:

A

Premolar bitewing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

For a premolar bitewing the horizontal angle is directed through:

A

distal of canine/premolar, premolars and 2nd premolar/1st molar contacts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

distal of canine/premolar, premolars and 2nd premolar/1st molar contacts

This is the horizontal angle for:

A

Premolar bitewing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Where should a cotton role be correctly placed /

A

Between bite block & opposing teeth

(NOT bite block & imaged teeth)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

What is the error seen in this image?

A

Cotton roll placement between bite block & imaged teeth

34
Q

What may cause the absence of apical structures?

A
  1. sensor not positioned over the apical area in the mouth
  2. bite block not against occlusal/incisial edge
  3. patient not biting down
  4. insufficient vertical angulation paralleling
35
Q
  1. sensor not positioned over the apical area in the mouth
  2. bite block not against occlusal/incisial edge
  3. patient not biting down
  4. insufficient vertical angulation paralleling

These may result in:

A

absence of apical structures

36
Q

A dropped film corner=

A

tipping

37
Q

What is the cause of tipping/dropped film corner?

A

sensor not placed parallel with occlusal/incisal surface of teeth

38
Q

What can be seen in this image?

A

Tipping

39
Q

For correct horizontal angulation, the central tray should be directed:

A

between interproximal contacts of interest

40
Q

For correct horizontal angulation, the central ray has to be projected:

A

Perpendicular to the sensor

41
Q

What error is seen in this image?

A

Central ray is not projected perpendicular to sensor (Mesial to distal)

42
Q

What error is seen in this image?

A

Central ray is not projected perpendicular to sensor (Distal to mesial)

43
Q

Is the incorrect horizontal angulation a result of (mesial to distal) or (distal to mesial)?

A

Mesial to distal

44
Q

Is the incorrect horizontal angulation a result of (mesial to distal) or (distal to mesial)?

A

Mesial to distal

45
Q

Incorrect vertical angulation results in:

A
  1. foreshortened images
  2. elongated images
46
Q

Excessive vertical angulation results in:

A

foreshortened

47
Q

X-ray is perpendicular to the image receptor, but the object is NOT parallel with the image receptor- what may occur?

A

Foreshortening or elongation

48
Q

What error can be seen in the following images?

A

Excessive vertical angulation- foreshortening

49
Q

What error can be seen in the following images?

A

Excessive vertical angulation- foreshortening

50
Q

What error can be seen in the following images?

A

Excessive vertical angulation- forshortening

51
Q

What is the issue with foreshortened images?

A

With smaller active area, parts of image are missed

52
Q

What error can be seen in the following images?

A

Excessive vertical angulation- foreshortening

53
Q

What error can be seen in the following images?

A

Excessive vertical angulation- foreshortening

54
Q

Caused by insufficient vertical angulation:

A

Elongated images

55
Q

What error can be seen in the following image?

A

Insufficient vertical angulation - elongation

56
Q

What error can be seen in the following image?

A

Insufficient vertical angulation- elongation

57
Q

Cone cuts occur with & without:

A

sensor holder

58
Q

PID not properly aligned with the sensor holding device from either incorrect XCP assembly or poor alignment of PID with XCP:

A

Cone cuts with sensor holder

59
Q

What error can be seen in the following image?

A

PID alignment problem - cone cut with sensor holder

60
Q

Cone cuts=

A

PID alignment problem

61
Q

What is the cause of cone cuts without the sensor holder?

A

PID not directed at center of film

62
Q

Label which is an error caused by the thyroid collar & which is the cone cut:

A

Left- thyroid collar
Right- cone cut

63
Q

What error can be seen in this image?

A

Sensor wire superimposition

64
Q

Exposure problems include:

A
  1. overexposed
  2. underexposed
  3. no exposure
  4. sensor wire superimposition
  5. post exposure
65
Q
  1. overexposed
  2. underexposed
  3. no exposure
  4. sensor wire superimposition
  5. post exposure

Out of these problems which are less dramatic & why:

A

1,2, 3 because post-exposure image processing by the software immediately corrects large exposure discrepancies

66
Q

What exposure error can be corrected by post-exposure imaging processesing software?

A
  1. overexposure
  2. underexposure
  3. no exposure
67
Q

What error can be seen in the following image?

A

Overexposure

(think over= dark out bc clouds are over the sun)

68
Q

A high density image is:

A

overexposed

69
Q

What factors contribute to an overexposed, high density image?

A
  1. increased time
  2. increased mA
  3. increased kV
70
Q

What error can be seen in the image below?

A

Underexposure

71
Q

What is the main cause of an underexposed image?

What else can contribute

A

Main cause: insufficient exposure time

kVp, mA, Excessive tube-receptor distance (related to inverse square law)

72
Q

-insufficient time
-insufficient mA
-insufficient kVp

These would result in what type of image?

A

Underexposed

73
Q

Sensor wire superimposition can be considered a ____ problem

A

exposure

74
Q

What error can be seen in the following image?

A

Post exposure image processing error- calibration files

75
Q

What error can be seen in the following image?

A

Post exposure image processing error- (+gain, gamma, -gain)

76
Q

What error can be seen in the following image?

A

Post exposure image processing error- (+gain, gamma, -gain)

77
Q

The main patient preparation problem:

A

failure to remove a non-fixed item from patient that may be in path of the primary X-ray beam

78
Q

What error can be seen in the following image?

A

patient has glasses on

79
Q

T/F: not removing jewelry risks masking disease

A

True

80
Q
A

Oral Radiology (21 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions