RaySafe Solo User Manual
Page 40
I sometimes get readings which are far off expected when measuring with RaySafe Solo DENT on
panoramic X-ray machines, why?
Most likely the detector’s sensor area (2 x 22 mm) is not fully aligned with, or not completely centralized in the
beam. Use the RaySafe opG holder (see page 33 for instructions) which has a fluorescent screen cap, which
will confirm the position of the beam in relation to the sensor.
What is the difference in dose and dose length product in a CT application?
dose is basically a property of a point in space, while dose length product (dlp) is dose times a length. When
measuring with a 100 mm ionization chamber the following holds true: dlp = (Measured dose in a point and
assuming a homogenous field) • (Slice Width).
When using the RaySafe Solo Ct it is possible to change between dose and dlp by selecting dose Unit as Gy
or Gycm in the settings menu.
How do I switch between kV and kVp?
the RaySafe Solo switches to kVp automatically, as soon as the signal level is high enough (but only when
using R/f high, RAd or dent high). for high frequency generators, the difference between kV and kVp will be
negligible.
In comparison to an ion chamber, the RaySafe Solo shows lower values, why?
the RaySafe Solo detector only measures the primary beam, not scattered radiation, because the back of the
detectors shielded with 1 mm of lead. the detector may therefore be placed on any surface and still measure
true air kerma.
Most ionization chambers measure primary as well as scattered radiation, which is why they should be placed
free in air (at least 0.5 m (2 ft) from any scattering material). When used in such fashion, the RaySafe Solo will
show similar readings when compared to an ion chamber.
What is the difference between the “paddle” and “no paddle” setting in the mammography sensor
menu?
This setting selects between two different kV calibrations. It does not affect any other measurement, such as
dose, HVL or time.
• Why do I not get a kV reading when choosing beam qualities other than Mo/Mo and W/Rh for
mammography?
As far as we know, all mammography devices have at least one of the above mentioned beam qualities.
To calibrate the RaySafe Solo for measuring kV on other beam qualities would thus result in unnecessary
complexity and a higher calibration cost.
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RaySafe Solo User Manual – tips and tricks