HVL is an indication of the beam quality and is defined as the amount of Al filtration, measured in mm, neededto reduce the dose in half. HVL is kVp dependent and HVL should not be confused with total filtration.HVL is available for R/F, MAM, MAM dose, RAD, Dose and DENT detectors equipped with the HVL kit option.TOTAL FILTRATION – OPTIONALTotal filtration is a calculation of the amount of physical filtration between the X-ray source and the patient,expressed in equivalent amount of mm Al.The total filtration value measured may differ from the filtration stated by the X-ray manufacturer, as there mightbe additional filtration not specified by the manufacturer.mA AND mAsThe RaySafe Solo is capable of measuring mA, mAs and time. If the peak mA is > 8 mA, it can also measurepulses, frame rate and mAs per pulse.When an exposure longer than 6 seconds has ended, a mA value recorded approximately 2 s before end trig isdisplayed.31RaySafe Solo User Manual – Measurement definitions