10-17 Flashcards
MISCELLANEOUS TECHNIQUE PROBLEMS (any receptor)
- Phalangioma
- Movement
- Sensor placement
- Beam angulation - Horizontal
- Beam angulation - Vertical
- PID/BID alignment
- Sensor wire placement
Can occur with any receptor/film imaging technique)
MISCELLANEOUS TECHNIQUE
PROBLEMS (PSP and film images)
- Sensor bending
- Sensor Creasing
- Double exposure
- Reversed placement
What is phalangioma?
Patient’s finger positioned in
front of the sensor
What causes issues with movement?
Patient or x-ray tube head moves during exposure of sensor = blurred image
Learn the correct placement of sensors
Slide 22
FITB: Sensor placement is _____ critical with solid-state sensors…
Why?
MORE
There is a smaller active image capture area
How should the cotton roll be placed?
Between the biteblock and opposing teeth, NOT between biteblock and imaged teeth
What error would result from bite block not against occlusal/incisal edge; or patient not biting down
Absence of apical structures from incorrect sensor placement or “tipping” (ex: dropped film corner)
An error in what will result in the central ray not projected
perpendicular to sensor
Incorrect horizontal angulation
What is the cause of foreshortened images (ideal cause we can see apices) Elongated images>
Incorrect vertical beam angulation (excessive vertical angulation)
Insufficient vertical angulation
What happens if the beam is perpendicular to the sensor, not the tooth? What if it is perpendicular to the tooth
A foreshortened image
An elongated image
What kind of problems are cone cuts (with/without sensor holder)
PID/BID Alignment Problems
What can cause a cone cut with sensor holder?
incorrect XCP Assembly OR poor alignment of PID with XCP
What can cause a cone cut without sensor holder?
PID not directed at center of
film
What are 5 Exposure Problems? Which are most dramatic?
- Overexposed
- Underexposed
- No exposure
- Sensor wire superimposition
- Post exposure
(4,5 most dramatic)
