Kodak 2100 - Positioning the imaging receptor; Exposure parameters

Exposure
3–2 KODAK 2100 RADIOLOGY PROCESS
Bisecting technique
When using the bisecting technique, do not use a rectangular collimator. This limits the risk of
X-ray beam and image receptor misalignment.
Positioning the Imaging Receptor
Using the KODAK 2100 Intraoral X-ray System, you may create an X-ray image on one of the
following imaging receptors:
• Conventional silver halide films, such as KODAK INSIGHT or KODAK ULTRA-SPEED
dental films.
• Digital sensors such as KODAK RVG sensors.
• Phosphor plate such as KODAK Imaging plates.
Placing the receptor correctly is critical. Check your own dental radiography manual for
information on how to place the imaging receptor correctly.
If you do not position the film or the sensor correctly, this results in errors on the radiography, 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 do not position the
system correctly, angulation errors can occur (angulation of the receptor to the tooth itself).
If the beam exit pattern is not aligned with the imaging receptor, then part of the radiography will
not be exposed to radiation and the final radiography 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 radiography is lighter and may show artifacts, such as foil pattern or sensor cable.
Exposure
Exposure Parameters
Since each receptor (film, phosphor plate or digital sensor) has its own sensitivity to X-ray
radiation. the sensor choice impacts the exposure parameters. For instance, the sensitivity class
for conventional dental films is characterized with the letter D, E, or F where F is more sensitive
than E, and E more sensitive than D. Consequently, the required dose for the correct exposure
goes down as sensitivity increases.
Due to the different sensitivity of the digital sensors, you also need to adjust the exposure
parameters to the used sensor type (film or digital equipment).
90°