Customer will not provide patient information.On (b)(6) 2016 the radiation safety officer (rso) from (b)(6), reported to ge healthcare (gehc) field engineer (fe) that cumulative dose for a patient during exam on (b)(6) 2016 was high.The operator stated the system did not display cumulative dose on monitor only dose area product (dap) resulting in cumulative dose exceeding 3 gy.This investigation used information from gehc fe and system logs.On (b)(6) 2016 gehc fe confirmed dose reading is clear and visible on in room monitors.Fe confirmed system is working within specifications with no monitor malfunction.System dose management and related displays (live monitor-air kerma rate, cumulative air kerma-reference monitor: x-ray time, cumulative air kerma, cumulative air kerma times area product) were functioning properly.System was calibrated in (b)(6) 2015 with fluoro dose rate < 10r/min.Gehc engineering found peak incident air kerma for this exam was 13.6 gy.This long exam used digital subtraction acquisition (dsa) on large patient.The settings were likely determined by physician¿s clinical judgment for best image quality.Dsa are powerful acquisitions that can result in high dose in a short time.Patient sustained no radiation injury, burn or adverse effect.There is no evidence of system malfunction and system was properly calibrated.Site rso confirmed operators were trained by gehc during system installation and declined retraining.Probable root cause is either the user was not aware of location to monitor dose or ignored it.Based on this analysis, no corrective or preventive action is needed.No further action required.
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