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88Chapter5supplementaryoperatingtool;itsvaluecurrentlyisbeingassessedindifferentmedicalspecialties15In thisstudy wecompared theuseof two3D visualization techniques3DprintingandARforoptimizingthesurgicalplanningofnephron-sparingsurgeryforWT.Toourknowledgetheaddedvalueofdifferent3Dvisualizationmethodsinadditiontoconventionalimaginginchildrenwithcancerhasneverbeforebeeninvestigated Apanelofpediatriconcologysurgeonsin theNetherlands wasaskedtoevaluatethe3DvisualizationtechniquesandreportaboutthepotentialaddedvalueoftheirusebeforesurgeryMETHODSPOPULATIONImagingdata from10patientsdiagnosed witha WTin thePrincessMáximaCenterforPediatricOncologyUtrechttheNetherlandsbetweenJanuary12016andMay1 2017 wereincludedin our studyPatients withmetastases at diagnosis wereexcludedand3patientspresentingwithbilateralWTswereselectivelyincludedSevenotherpatientswereselectedbasedonbest-qualityconventionalimagingavailableDatafromconventionalimaging(MRIand/orCTscans)werederivedfromthese10selectedpatientsInmostpatientsMRIwasthepreferredimagingtechniquefordiagnosisandoptimaltumorassessmentComputedtomographywasperformedtoclarifyvascularanatomywhennephron-sparingsurgerywaslikelytobeperformedTheMedicalResearchInvolvingHumanSubjectsActdidnotapplytothisstudyandwereceivedofficialapprovalfromthemedicalresearchethicscommitteesoftheUniversityMedicalCenterUtrechtUtrechttheNetherlandsAlldataweredeidentified;thereforeitwasnotnecessaryaccordingtoDutchLawtoaskforinformedconsentThisstudyfollowedtheStandardsforQualityImprovementReportingExcellence(SQUIRE)reportingguidelineforqualityimprovement16IMAGINGMETHODSContrast-enhancedMRIoftheabdomenwasperformedona15-TMRIsystem(Achieva;PhilipsMedicalSystems)Coronal3DT2-weightedimagingalongwithfat-suppressedT1-weightedimagingbeforeandaftertheadministrationof