Based on the provided information and test performed on site there is no indication of a malfunction of the mr system or coil used that contributed to the event.The observed blister can be explained by skin to skin contact between the thumb of the patient and the forehead.It was stated by the customer that during the scan the patient moved his thumb to his forehead and created self-inflicted rf loop.Contributing factor in this case: 7 scans with high sar values (> 2 w/kg) were consecutively executed, allowing no cool down time for the patient.
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