Philips Expression MR400 - Page 406

E‐2GuidelinesandReferencesExpressionMR400InstructionsforUse
1. PreparethepatientfortheMRprocedurebyensuringthattherearenounnecessary
metallicobjectscontactingthepatient'sskin(e.g.,metallicdrugdeliverypatches,jewelry,
necklaces,bracelets,keychains,etcetera).
2. PreparethepatientfortheMRprocedurebyusing
insulationmaterial(i.e.,appropriate
padding)topreventskin‐to‐skincontactpointsandtheformationof“closed‐loops”from
touchingbodyparts.
3. Insulatingmaterial(minimumrecommendedthickness,1cm)shouldbeplacedbetween
thepatient'sskinandtransmitRFcoilthatisusedfortheMRprocedure(alternatively,the
RFcoil
itselfshouldbepadded).Forexample,positionthepatientsothatthereisnodirect
contactbetweenthepatient'sskinandthebodyRFcoiloftheMRsystem.Thismaybe
accomplishedbyhavingthepatientplacehis/herarmsoverhis/herheadorbyusingelbow
padsorfoampadding
betweenthepatient'stissueandthebodyRFcoiloftheMRsystem.
ThisisespeciallyimportantforthoseMRexaminationsthatusethebodycoilorotherlarge
RFcoilsfortransmissionofRFenergy.
4. Useonlyelectricallyconductivedevices,equipment,accessories(e.g.,ECGleads,
electrodes,etcetera),and
materialsthathavebeenthoroughlytestedanddeterminedto
besafeandcompatibleforMRprocedures,aslistedinthisIFU.
5. CarefullyfollowspecificMRsafetycriteriaandrecommendationsforimplantsmadefrom
electrically‐conductivematerials(e.g.,bonefusionstimulators,neurostimulationsystems,
etcetera).
6. Beforeusing electricalequipment,checktheintegrity
oftheinsulationand/orhousingof
allcomponentsincludingsurfaceRFcoils,monitoringleads,cables,and wires.Preventive
maintenanceshouldbepracticedroutinelyforsuchequipment.
7. Removeallnon‐essentialelectricallyconductivematerialsfromtheMRsystem(i.e.,
unusedsurfaceRFcoils,ECGleads,cables,wires,etcetera).
8. Keepelectricallyconductive
materialsthatmustremainintheMRsystemfromdirectly
contactingthepatientbyplacingthermaland/orelectricalinsul ation betweenthe
conductivematerialandthepatient.
9. KeepelectricallyconductivematerialsthatmustremainwithinthebodyRFcoilorother
transmitRFcoiloftheMRsystemfromformingconductiveloops.
Note:Thepatient's
tissueisconductiveand,therefore,maybeinvolvedintheformationofaconductiveloop,
whichcanbecircular,U‐shaped,orS‐shaped.
10. Positionelectricallyconductivematerialstoprevent“crosspoints”.Forexample,across
pointisthepointwhereacablecrossesanothercabl e,wherea
cableloopsacrossitself,or
whereacabletoucheseitherthepatientorsidesofthetransmitRFcoilmorethanonce.
Notably,eventhecloseproximityofconductivematerialswitheachothershouldbe
avoidedbecausesomecablesandRFcoilscancapacitively‐couple(withoutanycontactor
crossover)when
placedclosetogether.
11. PositionelectricallyconductivematerialstoexitdownthecenteroftheMRsystem(i.e.,
notalongthesideoftheMRsystemorclosetothebodyRFcoilorothertransmitRFcoil).