5. Measurements with the Barracuda System
Mammography
Barracuda & QABrowser Reference Manual
2012-10/4.3A
138
5.6.4 Dose Measurements with the R100 or Ion Chamber
If the R100 is selected (not recommended for mammography since no automatic
compensation is available) all three types of electrometer modules can be used. For an
ionization chamber only one of the EMM-Bias electrometer modules can be used,
since it supports bias to an ion chamber.
It is often more convenient to use the MPD to measure dose for a
mammography tube since no manual energy compensation has to be done,
as is the case with the R100 (or TP compensation for an ionization chamber).
1. Place the R100 or Ion Chamber in the field
and connect the cable to the EMM input,
see picture below.
2. Set up the Barracuda and the handheld
computer according to the description in
Setting Up the Barracuda for
Mammography .
3. Follow the same step as for the measurements with MPD but select Dose as
parameter. You will also need to select the EMM module instead of the MPD and
select an ionization chamber or R100 from the detector list, as seen below.
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