CH 31 and 32 Vocabulary Flashcards
Ala
the winged flare of the nostril
Cone Cut
An error created when only part of an image is seen on a radiograph due to improper alignment of the PID with the film.
Elongation
A vertical angulation error that occurs when there is insufficient vertical angulation of the PID to the film.
Foreshortening
A vertical angulation error that occurs when there is excessive vertical angulation of the PID to the film.
Horizontal angulation
Proper alignment of the PID in a side-to-side or back-and-forth direction.
Overlapping
A horizontal angulation error that occurs when the x-ray beam is not at 90 degrees to the tooth and film packet and images from two adjacent structures are superimposed on top of each other.
Perpendicular
Intersecting at or forming a right angle to the tooth and film packet, crating a corner. (opposite of parallel)
Position Indicating Device (PID)
A cylinder affixed to the tube head that is used to align the xray with the film in the patients mouth.
Tragus
The prominence of tissue located toward the middle opening of the ear.
Vertical angulation
Proper alignment of the PID in an up and down direction.
Ala-tragus line
Line that runs from the winged flare of the nostril (ala) to the opening of the ear (tragus)
Anteroposterior plane
A forward-backward plane that is aligned with a specific landmark.
Edentulous
Without teeth
Frankfort plane
A horizontal line from the upper margin on the ear to the lower margin of the eye orbit.
Intensifying screen
Screen used to expose sheet film to the light when activated by radiation
