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6
Example of Table 1 use
Measured or set tube voltage: 30 kV
Selected Favourite: “IQST w PDP Rh/Rh 30 kV”
Radiation Quality: Mo/30 µm Mo+IQST
Measured dose: 0,50 mGy
Correction table factor Cq: 1.056 for 30 kV
Corrected dose: 1.056 × 0,50 = 0,528 mGy
Hub for Product CD
oRTIgo license key label
Calibration factor label
1.7. Vascular Systems
When measuring with the PDP on vascular systems with 1.5 to 2.0 mm Cu additional
filters, a beam correction factor has to be added. This factor is composed of the
backscatter contribution, which is not detected by the dose detector since it is shielded,
and the energy dependence of the ion chamber.
Typically, the backscatter is approximately 6 % and the energy dependence may be as
high as 8 %. To correct for the deviation and make the probes comparable, this factor
(1.14 in this example) is added as a beam correction factor in the software
. This factor
is already added in the favourites/templates designed for vascular systems, as seen in
the picture in section 1.3.
1.8. Other Measurements
For other measurements, see the Piranha manual.
1 For more information about ion chamber sensitivity variations for cupper filters, see appendix 1.
Piranha Dose Probe Holder User’s Manual
2009-09/1.0B
Overview of the label inside the case.