Kodak 2200, Руководство пользователя, Страница: 20 / 42

SM731_K2200_01_en 06/2009
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Figure 11: Paralleling technique (left) and Bisecting technique (right)
Positioning the imaging receptor
Using the KODAK 2200 Intraoral X-ray System, you may create an x-ray
image on one of three different types of imaging receptors:
•
Conventional silver halide films, such as KODAK INSIGHT or
KODAK ULTRA-SPEED dental films.
•
Digital sensors, such as KODAK RVG sensor.
•
Phosphor plate, such as KODAK Imaging plates.
Properly placing the receptor is critical. Check your dental radiography text
for information about proper placement of the imaging receptor.
Improperly positioning the film or sensor results in errors on the radiograph,
such as distorted teeth and roots, elongation, magnification, and/or
overlapping contacts. The paralleling technique generally reduces the risk of
such errors. However, if you improperly position the system, angulation
errors can occur (angulation of the receptor to the tooth itself).
If the exit pattern of the beam is not aligned with the imaging receptor, then
part of the radiograph will not be exposed to radiation and the final
radiograph will have some clear (unexposed) areas. This defect is called
“cone cuts”.
The imaging receptor is marked to indicate the tube side. If the orientation is
not correct, the resulting radiograph is lighter and may show artifacts, such
as foil pattern or sensor cable.