5. Measurements with the Piranha System
Fluoroscopy and Pulsed Fluoroscopy
2014-06/5.5C
105
Piranha & QABrowser Reference Manual
4. Select I.I. input dose rate from the menu.
5. The Select Detector screen is now displayed. Select External.
6. Tap Select.
7. Place the Piranha Dose Probe in front of the image intensifier but outside the
measuring field for the mA feedback loop. You may use the optional detector rod that
can be attached to Piranha Dose Probe to position the detector without risk for
hazardous X-ray exposure. Observe the image on the monitor.
8. The real-time display is now displayed. Set the generator. Tap Reset.
Since the external dose probe (Piranha Dose Probe) is not sensitive to
back scatter, a lower value compared to a transmission ion chamber is
typically detected (typically in the range of 5 - 20 %).
You may use the beam correction factor to make automatic corrections. The
beam correction factor may also be stored permanently in a Favourite for easy
access.
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