The actual acoustic noise level that is produced by an mri system depends on the type of mr, the configuration and the used scan protocols (examcard).Also the local situation may have influence on this level.The actual used exam card and log-files were requested and used to determine an approximate acoustic noise produced on the mr system.A similar mr test configuration and the exam card involved were used to determine the sound levels.In total 7 scans were conducted with sound pressure levels (spl) varying between 94.9 db and 113.7 db, with an average of 100.4 dba (laeq).The total scan time was 24 minutes 35 seconds.The patient was protected against acoustic noise by single hearing protection (philips headset).The acoustic noise level produced by the gradient chain is within safe limits with the single hearing protection applied.The music played with the audio chain may have contributed to the hearing problems, in case of maximum volume without using earplugs.
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