DIADOS E
T11035
Operating Manual
– Performing a Measurement
36
D616.131.00/10 en
4.5.2 Measurements at Panorama X-ray Units
Positioning the semiconductor detector
For dose measurement at panorama X-ray units
with a moving image receptor cassette, the semi-
conductor detector as well as a cassette adapter is
used. The cassette adapter replaces the image
receptor cassette (Refer to the user manual of the
detector).
The detector is connected to the DIADOS E via
extension cable.
If it is not possible to use the cassette adapter (e.g.
due to its size) you can install the detector in the X-
ray path, using Velcro tape. The Velcro tape should
be attached on the back of the detector for this pur-
pose.
CAUTION
Improper handling.
Equipment damage!
Do not use tape with two adhesive sides be-
cause the detector is difficult to remove. Keep
the X-ray path clear of adhesive tape.
Assemble the absorber demanded by DIN 6868-51
(PTW absorber T42018 or T42029) and attach it to
the secondary diaphragm, using adhesive tape
(also refer to section 4.2.2). Keep the adhesive tape
away from the X-ray path.
Select the appropriate radiation quality with the
FILTER
key at the DIADOS E (see section 1.5.6).
CAUTION
Improper handling.
Equipment damage!
Ensure that the cable is routed so as not to im-
pede the range of motion of the X-ray unit and of
the cassette adapter.
Position the attenuator such that it covers the
semiconductor detector in its entirety while the
radiograph is taken.
Performing a measurement
Perform a zero adjustment.
For a dose measurement, the Autostart mode must
first of all be disabled with the START key. After
activation of the START key, DIADOS E will begin
measuring the time and dose, and a panoramic
radiograph can be initiated.
When the radiograph has been taken DIADOS E
will indicate the image receptor dose K
B
measured
by the detector; the displayed measuring time is
irrelevant.
The next measurement can be performed by push-
ing the START/STOP key and initiating a new pan-
oramic radiograph.
WARNING
Improper handling.
Patient Hazard!
A measurement performed in the Autostart mode
at panorama X-ray units will not yield correct
dose values, because a detector signal caused
by scattered radiation may cause the parameter
readout to autoreset even after the detector has
passed through the X-ray. A dose measurement
should
always
be
performed
with
the
START/STOP key.
