5. Measurements with the Barracuda System
Tube Current Probes
Barracuda & QABrowser Reference Manual
2012-10/4.3A
168
To measure tube current with the MAS-1B
1. Setup the Barracuda according to the description earlier in this manual.
2. Connect the MAS-1B probe to the X-ray generator as described in the MAS-1B
User's Manual.
3. Connect the MAS-1B probe to the EMM module.
4. In the QABrowser select type of measurement.
5. Select Tube Current from the menu.
5A. The Select Detector screen is now displayed. Select the MAS-1B probe. Tap
Select.
6. The real-time display for tube current is now displayed. Set the generator. Tap
Reset.
7. Start the fluoroscopy.
8. The figure to the left shows the real-time
display during fluoroscopy. The tube
current is measured and the display is
updated approximately every four
seconds. Note that for low mA values the
mAs and the exposure time may not be
measured. Tap Hold to "freeze" current
value in the display. The waveform is also
acquired when Hold is activated.
5.9.2 MAS-2B, Non-invasive mAs Probe
This section describes how to measure mAs as single parameter. This means that the
measurement starts when the mAs-probe detects the tube current. The measurement
is performed in the same way if you use a multi-parameter display. If the MPD is
selected as the trig source the section about false triggering can be ignored.
The procedure is basically the same if you have an old MAS-2 probe (with the adapter
box).
The MAS-2B probe uses a current clamp probe connected to an adapter box to
measure mAs and mA non-invasively.
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