Exam 1.3: Intraoral Technique & Darkroom Errors Flashcards Preview

D2: 621 Radiology > Exam 1.3: Intraoral Technique & Darkroom Errors > Flashcards

Flashcards in Exam 1.3: Intraoral Technique & Darkroom Errors Deck (20)
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1
Q

What are the 4 Types of Radiograph Errors

A
  1. Patient Preparation
  2. Technique Errors
  3. Exposure and Processing Errors
  4. Film-Handling Errors
2
Q

What are the 2 sub-types of Patient Prep errors?

A

Radiopaque artifacts

Motion artifact

3
Q

2 common examples of radiopaque artifacts

A

Eyeglasses & Dental appliances

4
Q

What is the primary cause of motion artifact

A

Patient movement as a result of clinician not emphasizing the importance of staying very still

5
Q

Technique Errors: Appropriate Teeth - Why is it so important to make sure the right teeth are in frame?

A

Because each pic is designed to capture specific teeth and structures…..it helps minimize exposure

6
Q

What can cause the “Apices Cut off” Technique error

A

Film not positioned apically enough

Insufficient Vertical Angulation can project images off the film

7
Q

What technique error can cause a “herringbone” pattern to be superimposed on the image of the teeth?

A

Putting the film in backwards

8
Q

What is “Dot Artifact”…how can it be avoided

A

Film ID dot can interfere with important structures

Prevent by obeying “Dot in the Slot”

9
Q

What error can result in a double image?

A

Re-exposure of a previously exposed, but undeveloped film

10
Q

How is horizontal angulation related to diagnosing interproximal caries?

A

Horizontal angulation error can cause the image to have overlapping contacts making interproximal caries diagnosis impossible

11
Q

What arch is usually affected by vertical angulation errors?

A

Maxillary.

Foreshortened buccal roots and failure of the palatal and buccal cusp tips to align occur with too much vertical angulation

12
Q

What error will cause the image of the plastic positioning ring to show on the image?

A

Incorrectly assembling the film positioning device

13
Q

What error occurs when only part of the film is covered by the beam; and leaving the other part unexposed?

A

Cone Cut

14
Q

What is the 50% rule for BW

A

Equal amounts of maxillary and mandibular crown should be captured on the BW

15
Q

Exposure and Processing Errors:

What error results in the plastic film being clear with a blue tint?

A

Processing an unexposed film

16
Q

What are “Roller Streaks”

A

Radiolucent lines may appear on the film if the rollers in the automatic processor are dirty and sludge contaminates the film

17
Q

What happens if the film is exposed to light before processing?

A

The image will be ruined

18
Q

What type of film handling error occurs when radiolucent lines/curves end up on the image from bending the film or pressing too hard on it pre-exposure

A

Pressure marks

19
Q

What would cause a brown colored stain on a traditional (non digital) xray image

A

Insufficient removal of the chemical fixer

20
Q

What might cause film overlap?

A

Feeding films into the processor in too rapid succession