Planmeca Proline EC Panoramic User Manual page 24

PANORAMIC EXPOSURE
Frankfort plane light
Second
incisor
20 Planmeca Proline EC Panoramic X-ray
Frankfort
plane
light
-05
mm
Apices of the upper
central incisors
Canine
Focal trough light
READY
PRET
Cassette carriage
in ready position
Position the patient's head so that the Frankfort plane
coincides with the Frankfort plane light beam. To do this
support the back of the patient's head with your hand
and then adjust the tilt of the patient's head by raising or
lowering the vertical carriage with these keys. The
patient's back should be straight. If necessary stretch
and straighten the patient's cervical vertebrae by mov-
ing the vertical carriage up slightly.
Note that the Frankfort plane light, located on the side
of the cassette drive assembly, can be slid up and
down to accommodate different head sizes.
Position the apices of the patient's upper central inci-
sors within the image layer (focal trough) of the unit.
To do this press and hold either of the focal trough
positioning keys to move the patient positioning mech-
anism, and patient, backwards or forwards until the
focal trough light, which indicates the centre of the
focal trough, falls between the second incisor and the
canine. For an average patient positioning the teeth as
described above will place the apices of the upper cen-
tral incisors within the focal trough. The minus (-) key
moves the patient forwards, and the plus (+) key
moves the patient backwards.
The number that appears on the display is the distance
the patient positioning mechanism must have been
moved, backwards or forwards, for the patient's teeth
to be positioned within the focal trough and it serves as
a reference if you need to retake the exposure.
Press the ready key to drive the unit to the ready posi-
tion. The indicator light will come on.
User's manual