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4. Operation
32 EzRay Air Wall (VEX-S300W) User Manual
Positioning the Imaging Sensor
To ensure image quality, the digital imaging sensor must be appropriately positioned
(for information about the proper placement of the imaging sensor, please refer to
‘Positioning Instructions’ on page 26 .

Failure to position the imaging sensor properly can result in errors on the
radiograph, such as distorted teeth and roots, elongation, magnification, and
overlapping contacts.
The paralleling technique generally reduces the risk of such
errors, but if you position the sensor improperly, angulation
errors may occur (angulation of the sensor to the tooth itself).

Failure to align the imaging sensor with the exit pattern of the X-ray beam can
result in cone-cuts on the radiograph. The cone-cuts are bright areas that are
shown on the radiograph when part of the radiograph is not exposed to radiation.
Please refer to the following figure as an example of cone-cuts.
The following figure indicates how the cone-cut occurred by showing the position of the
imaging sensor and the radiation area.
Cone-cut
Cone-cut
Position of the sensor
Radiation area