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Section 12.0
MAN 06–0017H
ZIEHM QUANTUM
User’s Manual Page 189 of 220
decimal point according to the dose rate and the accumulative values depending on weather
radiation is on or off. This also includes the dose for all images which have not been saved but are
part of the radiation accumulated since the last reset of the
Dose/Timer display.
12.8.3. TEST INTERVAL:
In accordance with FDA 21 CFR 1020.30(h)(6)(i), a schedule of maintenance for any system
instrumentation associated with the display of air Kerma information necessary to maintain the
displays of AKR and cumulative air Kerma. Therefore, the automatic dose rate must be tested at
regular intervals. Every month is recommended, however owner/operator must comply with local
and national standards that may apply.
The AKR Dose Display must be tested twice yearly by a qualified and authorized Service
Representative to insure the dose display accuracy and perform Calibration if required.
12.8.4. OPERATOR MONTHLY TEST PROCEDURE:
•
Turn on the C-arm and wait for the system to become fully operational
•
Select Fluoroscopy program (Extremities)
•
Insert a patient-equivalent phantom (2.5 cm x 15 cm square aluminum plus 1.5 mm copper)
or equivalent in the beam at approximately 30 cm from the image intensifier on top of a
radiation translucent table.
•
Position the c-arm image intensifier over the phantom with generator under the table making
sure the phantom it is in the middle of the radiation beam.
CAUTION
Observe all radiation safety procedures during the text test steps.
•
Perform radiation by pressing the hand switch and holding it for at least 20 seconds.
•
Observe the control panel display values. They should resemble the following. (Actual
values may be slightly different) 70 + 2 kV / 5.7 mA + 0.4 mA Dose display will be in
mGy/min.
•
Write down the value of kV/mA and dose mGy/min in your log.
•
Press and hold the Reset Timer button for 2 seconds to reset the fluoroscopic timer and the
dose display on the touch panel.
•
Press and hold down the radiation hand or foot switch to initiate radiation. The test takes 1
min . Do not interrupt the test. During the test, the system calculates and displays the dose
rate in mGy/min. Release hand switch when fluoroscopic timer reaches 1 minute “stop the
radiation as fast as possible”
•
View and record the cumulated dose rate displayed from the touch panel
•
Compare the new data with the previous monthly data test record.
NOTE:
If this is the first time you are doing this test then just record the information in your log
as the reference value then compare the next months test to this value