Page 114 - Demo

112Chapter6RESULTSLinkingtheHoloLenswiththeIGSsystemmadeitpossibletodisplaytheIGSplanningdirectlyintheworkingfieldoftheuserAnadditionalscreentodisplaytheplanningdatawasthereforenotrequiredwhicheliminatedtheswitchingfocusproblemTheaccuracyofthepresentedmethodwasevaluatedwith4experimentsTIGHT-FITEXPERIMENTSTheresultsofthetight-fitexperimentareshowninTable1TheKolmogorovSmirnovtestdemonstratedthatallEuclideandistanceswerenormallydistributed(P>05)Forthetight-fitIGSexperimentthemeanEuclideandistancewas06mm(SD=02)withamaximumerrorof10mmForthetight-fitARexperimentameanEuclideandistanceof07mm(SD=02)withamaximumerrorof14mmwasreported Thisdifferencewasnotstatisticallysignificant(P=99)LOOSE-FITEXPERIMENTSThe results of the placement of the tracked cube in the loose-fitting experiments aresummarized in Table 2 The mean Euclidean distances of the loose-fit AR experimentwerenormallydistributedandshowedanincreasecomparedwiththoseoftheloose-fitIGSexperimentranging from07mm(SD=04) to23mm(SD=05) Thisdifferencewasstatisticallysignificant(P<001)ComparingtheEuclidiandistanceofthe4observersintheloose-fitARexperimenttheKolmogorov-SmirnovtestprovedthattheEuclideandistanceswerenormallydistributed(P>05)A1-wayanalysisofvariancetestshowednosignificantdifferencebetweentheEuclideandistancesofthe4observers(P=13)DISCUSSIONRecentadvancesinmedicalimagingandimageprocessingtechnologiescanbeusedtoestablishadetailedvirtualoperationplan3334IntuitivetransferofthisvirtualoperationplantotheintraoperativesettingtoperformsurgeryaccordingtoplanningisdesirableIGSsystemscanbeusedwithintheoperationtheatretocorrelatetheplanningtothepositionofthepatientTheaddedvalueoftheseIGSsystemshasbeenprovenformanysurgicalprocedures1415Improvementsin