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ROENT > Lec 17: TECHNIQUE AND PROCESSING ERRORS > Flashcards

Lec 17: TECHNIQUE AND PROCESSING ERRORS Flashcards

1
Q

FILM PLACEMENT PROBLEMS

A

→ absence of apical structures
→ dropped film corner

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2
Q

incorrect vertical angulation

A

o foreshortened image
o elongated image

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3
Q

PROCESSING ERRORS

A

TIME AND TEMPERATURE ERRORS

CHEMICAL CONTAMINATION ERRORS

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4
Q

TIME AND TEMPERATURE ERRORS

CHEMICAL CONTAMINATION ERRORS

A

TIME AND TEMPERATURE ERRORS

→ underdeveloped film
→ overdeveloped film
→ cracked film CHEMICAL

CONTAMINATION ERRORS

→ developer spot
→ fixer spot
→ yellow-brown stains

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5
Q

FILM HANDLING PROBLEMS

A

→ developer cut
→ fixer cut
→ overlapped films
→ air bubbles
→ fingernail artifact
→ static electricity
→ scratched film

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6
Q

unexposed film exposed to light

A

Blank Film

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7
Q

film exposed to light prolonged exposure time

A

Dark Film

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8
Q

underexposed film

A

Light Film

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9
Q

Absence of apical or crown structures

A

film positioned too high or too low occlusally

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10
Q

film not placed parallel to occlusal corners

A

Dropped film corner

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11
Q

wrong location of identification dot

A

Inverted film

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12
Q

incorrect horizontal angulation

A

Overlapping of contact areas

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13
Q

PID alignment problem

A

Cone cut

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14
Q

film sharply bent

A

Film crease

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15
Q

finger is included in radiograph

A

Phalangioma

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16
Q

tire track or herringbone appearance

A

Reversed film

17
Q

sudden temperature change between developer solution and water bath

A

Cracked film (reticulation)

18
Q

developer solution comes in contact with film before processing

A

Developer spots (dark)

19
Q

fixer solution comes in contact with film before processing

A

Fixer spots/stains (white)

20
Q

insufficient rinsing/exhausted solution

A

Yellow-brown stains

21
Q

Fixer cut (black line)

A

underfixed portion

22
Q

Developer cut (straight white line)

A

underdeveloped portion

23
Q

two films contacting each other during processing

A

Overlapped film

24
Q

air trapped on film surface after being placed in the processing solutions

A

Air bubbles

25
Q

film emulsion damaged by the operator’s fingernail during rough handling

A

Fingernail artifact (black-crescent shape)

26
Q

film touched by fingers that are contaminated with fluoride or developer

A

Fingerprint artifact

27
Q

film packet is opened quickly
opened before the radiographer touches a conductive objected

A

Static electricity marks

28
Q

soft emulsion removed from the film by a sharp object

A

Film scratches

29
Q

accidental exposure of film to white light

A

Part of film exposed to light

30
Q

improper safelighting light leaks in darkroom outdated films
improper film storage contaminated solutions developer solution too hot

A

Fogged film (blurred)

31
Q

correct identification of landmarks is necessary to differentiate presence of ___

A

pathologies

ROENT (13 decks)

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