Esaote O-scan eXP, User Manual

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8 / 22 Chapter 4
Recommended Distances between Radiofrequency (RF)
Communication Systems and O-scan
It is recommended not to use radiofrequency (RF) transmission systems
near the MRI system; RF systems can cause interference.
The operator can prevent interference caused by electromagnetic fields by
maintaining a minimum distance between the MRI system and the RF
communication systems being used (for example cell telephones, mobile
telephones).
The disturbance shall not produce noise and artefacts distortion in the
images which cannot be attributed to a physiological effect and which may
alter the diagnosis.
O-scan according to the definition of the IEC 60601-1-2 ed. 4 standard is
suitable to be installed in professional healthcare facility environment.
The operator must remember that the intensity of the electromagnetic
fields generated by fixed transmitters (for example radio-base stations for
cellular or cordless telephony, TV and radio transmissions, amateur radio
transmissions) cannot be predicted on a theoretical basis. Consequently, a
direct measure may be necessary in the use environment of an O-scan
system. If the intensity of the electromagnetic fields exceeds that one
specified in the immunity levels shown in the previous tables, and the MRI
system performs incorrectly, additional measures may be necessary.