iaea human health series publications - SEDIM

the service engineer responsible for the equipment. If the plot of MPV (B) and variance versus mAs has R 2values less than 0.95, or if the ratios of (B–B 0 )/mAs are not within 10% of the mean value of the ratio, it willprobably be necessary to consult the service engineer responsible for the equipment.(2) For logarithmic (CR) systems: If the S# (Fuji and Konica), SAL, SALlog or PVIlog (Agfa) or EI (Carestream)has changed by more than the maximum indicated in Table 16, determine the cause of the change. First,establish that the output of the X ray unit has not changed. If the output has remained satisfactory, it willprobably be necessary to consult the service engineer responsible for the equipment. If the plot of the relevantfunction of the ‘exposure index’ versus mAs has R 2 values less than 0.95, it will probably be necessary toconsult the service engineer responsible for the equipment.8.5.2.6. Time frame for corrective actionCorrective action should be taken within 30 days of the test.97