Siemens MOBILETT XP, Instructions For Use Manual

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Radiation Calculation
Operator Manual
SPR8-230.621.01.03.02 64
of 106
Radiation Dose
The absorbed radiation dose (skin dose), D (Gy), can be estimated from the values
of Y in
Diagram 1 .
The absorbed radiation dose (skin dose) is dependent on:
❏ the x-ray tube voltage, U (kV)
❏ the quantity of charge, Q (mAs))
❏ the source to skin distance, r (m)
❏
the permanent (inherent) filtration of the single tank (mm Al)
Estimate the radiation dose
The radiation dose D is calculated with Equation (2) :
Equation (2) : D = Y x Q / r2
❏ Y ( µ Gy x m2/mAs) - conversion factor
❏ Q (mAs) - quantity of charge during exposure
❏
r (m) - source to skin distance. Use the built-in measuring tape to determine r
◆ Read the value of Y ( µ Gy x m2/mAs) from Diagram 1, corresponding to the
tube voltage (kV) used during exposure.
◆ Calculate the radiation dose D with Equation (2) .