DIADOS E
T11035
Operating Manual
– Performing a Measurement
34
D616.131.00/10 en
4.4 Measurements in Computed
Tomography
Connect the CT chamber according to section 2.3.2
and check the high voltage of the CT adapter. Posi-
tion the CT chamber for the selected application.
The device is operated as described in the previous
sections. The following difference, however, should
be observed: Instead of the parameters dose and
dose rate, the device will determine the parameters
dose-length product and dose-length product rate
(unit R or Gy).
Settings at DIADOS E
Use the APPL. key to select the application CT.
Use the MODE and the
ALT
+
FILTER
keys to se-
lect the operating mode and the necessary filter
setting. Typical settings: RQT9 0.25 mm Cu for
measurements free in air and for measurements in
phantoms. The LOW range is suitable for most
measurements.
Zero adjustment
Perform a zero adjustment. Please note that after
application of high voltage to the chamber the po-
tentials in the chamber may take a few minutes to
stabilize.
Measurement
Perform the measurement as described in sec-
tion 4.2 and perform an air density correction of the
reading.
NOTE
A measurement cannot be performed with the
Autostart function of DIADOS E when the detec-
tor is located in one of the peripheral bore holes
of the CT phantom. In this case a measurement
must be started with the START/STOP key. A
measurement can be performed with the Auto-
start function when the detector is located in the
central bore hole.
