Transcript PPTX Exposure and Technique Errors


Produces a non-diagnostic film

Increases exposure to patient due to
retakes

More time consuming

Decreases patient confidence in DA’s
abilities

Unexposed film: a result of a processed
film that was not exposed to radiation.
Appears clear, with no image
p. 227

A result of the film being exposed to
white light. The film is processed, but due
to light leaks, the film is undiagnostic
p. 227
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The film appears to have an overall
darkness, due to excessive exposure
time, milliamperage or kilovoltage
p. 227

This film is a result of too little exposure
time, milliamperage or kilovoltage. The
film will appear lighter than normal
p. 228

Missing Apices: Possibly caused from the
patient not closing all the way on the
bite block, or incorrect placement
p. 229

This usually occurs when patient fails to
hold the film correctly, or with not
enough pressure. Proper instructions will
alleviate this
p. 229

Foreshortening: this is the result of
excessive vertical angulation, normally a
problem in the bisecting technique
p. 230

Elongation: this is a result of too little
vertical angulation, images appear
longer than normal
p. 230

Overlapped images: this is a result of
improper central ray alignment through
the contacts of the teeth
p. 232

Cone cut: This is a result of improper PID
alignment with the film. The film will show
a curved, clear area on film
p. 231

Usually a result of the patient hold the film
with too much force, or placing the film too
far up on the palate. The curvature of the
film causes a distortion of the image
p. 233

Bends in the film intentionally folded by
the DA or from placement too far mesial
in mouth for patient comfort
p. 234

Film used to expose one area, then picked
up and used again for a different area.
With better organization of exposed and
unexposed film, this should never happen
p. 234

This is a result of the patient moving
during exposure, or the film moving from
improper placement
p. 235

Film placed in mouth with wrong side of
film facing the tubehead. The processed
film will show a herringbone pattern on
one side.
p. 235