Section 8.0
MAN 06–0017H
ZIEHM QUANTUM User’s Manual Page 108 of 220
8.16.2. POSITIONING AID
The laser targeting device allows you to locate and position the C-arm to anatomical
locations on the patient without having to initiate radiation:
Press the Laser button. A laser-
eam crosshair is generated, the central point of which
corresponds to the position of the central X-ray beam.
Position the C-arm in such a way above the patient that the central point of the laser-
beam crosshair is exactly in the center of the region to be screened.
8.17 DOSE DISPLAY FOR AKR AND ACCUMULATED AIR KERMA
8.17.1. AKR /Cumulative Air Kerma Dose Display (Active only on system manufactured after June
10, 2006)
The ZIEHM QUANTUM calculates the dose values based on the kV, mA as well as time of the
radiation exposure. The display automatically changes between live display of Air Kerma
(AKR) or the Cumulated Air Kerma values (AKR x Fluoroscopic Time) automatically sets the
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. See also Section
12 technical information of this manual.
8.17.2. DISPLAY FUNCTIONS:
The AKR/Cumulative air Kerma display performs two functions for displaying the dose the
patient is receiving or has received.
• Radiation on: The system will calculate the AKR (Air Kerma Rate) or live dose rate based
on the displayed kV, mA. The air Kerma is displayed in units of mGy/min and will continue
to display at least once every two seconds until the user /operator releases the radiation
switch.
• Radiation is turned off: The system will display the cumulated air Kerma dose value within 5
seconds with units of mGy.
8.17.3. DOSE DISPLAY USER/OPERATOR
Using and resetting the Dose display:
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