Ultrasound Obstet Gynecol 2023:61:278-287Published online in Wiley Online Library (wileyonlinelibrary.com).DOI:10.1002/uog.26129.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License,which permits use,distribution and reproduction in any medium,provided the original work is properly cited and is not used for commercial purposes9isuogGUIDELINESISUOG Practice Guidelines(updated):performance of fetalmagnetic resonance imagingClinical Standards Committeea standardized and almost complete assessment of thefetal anatomy is feasible4.However,in selected high-riskThe International Society of Ultrasound in Obstetricscases (e.g.those at risk for brain abnormalities becauseand Gynecology (ISUOG)is a scientific organizationof affected first-degree relatives),fetal MRI may bethat encourages sound clinical practice and high-qualityconsidered as a standard method,when previous targetedteaching and research related to diagnostic imagingultrasound examinations were considered normal4.in women's healthcare.The ISUOG Clinical StandardsCommittee (CSC)has a remit to develop PracticeGuidelines and Consensus Statements as educationalIs fetal MRI safe?recommendations that provide healthcare practitionerswith a consensus-based approach,from experts,forMRI is not associated with known adverse fetal effects atdiagnostic imaging.They are intended to reflect whatany point in pregnancy when performed without admin-is considered by ISUOG to be the best practice at the timeistration of contrast media.1.5Tesla(1.5T)or 3 T mayat which they are issued.Although ISUOG has made everybe used;when using 3T,machine-specific parameters areeffort to ensure that Guidelines are accurate when issued,available that regulate the level of energy deposition inneither the Society nor any of its employees or membersorder to maintain safe levels5.Applied radiofrequencyaccepts liability for the consequences of any inaccurate orfields may lead to heating of the fetus,which may bemisleading data,opinions or statements issued by the CSC.harmful.Thus,whole-body radiofrequency-field trans-The ISUOG CSC documents are not intended to establishmission is limited by the International Electrotechnicala legal standard of care,because interpretation of theCommission to an operating mode not exceeding a spe-evidence that underpins the Guidelines may be influencedcific absorption rate of 2 W/kg.Postnatal studies have notby individual circumstances,local protocol and availabledemonstrated any impact on hearing or growth followingresources.Approved Guidelines can be distributed freelyprenatal MRI at 3T7with the permission of ISUOG (info@isuog.org).Under which circumstances should fetal MRI beperformed?INTRODUCTIONThere is a general consensus that fetal MRI is indicatedFetal magnetic resonance imaging(MRI)is an importantfollowing an expert ultrasound examination in whichdiagnostic imaging adjunct to ultrasonographyl,espe-the diagnostic information about an abnormali
