R/F SENSOR: MEASUREMENT PARAMETER DEFINITIONS
Dose and HVL are calculated from all recorded data.
Dose rate is the average dose rate, calculated as dose/time.
Time starts the first time the dose rate waveform reaches 50% of peak, and ends the last time it drops below 50%.
Live readings are time since start trig.
kVp and total filtration are calculated from an average of samples above ~90 % of peak signal level.
Pulses are counted at every start trig with more than 4 ms since last end trig.
Pulse rate and dose per pulse are averages from the last 6 pulses.
For measurements longer than 3 s, the final readings of dose rate, kVp, HVL and total filtration are moving
averages ending approximately 1–2 s before end trig. Live readings are moving averages.
PARAMETERS IN DOSE RATE WAVEFORM
T: Time
P1, P2, P3: Pulses
DR: Dose rate
: Dose
PARAMETERS IN TUBE VOLTAGE WAVEFORM
T: Time
P1, P2, P3: Pulses
kVp: Peak tube voltage
NOTE! If measurements are made simultaneously with the R/F sensor and mAs cable, any shared
parameter (time, pulses or pulse rate) will be taken from the R/F sensor.
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