ABSTRACT
Objective Toexploretheclinicalvalueofiterativedecompositionofwaterandfatwithechoasymmetryandleast-squaresestimationquantitationsequence(IDEAL-IQ)foraccurateandquantitativeevaluationofvertebraebodyfatfraction(FF)of lumbar.Methods Accordingtotheresultsofbonemineraldensity(BMD),60healthycheckers/patientsmatchingthestudycriteria weredividedintothenormalBMDgroup(groupA,n=17),thelowBMDgroup(groupB,n=18)andtheosteoporosis(OP)group (OP,groupC,n=25).Theageofthreegroupswasanalyzed.T1WI,T2WI,andIDEAL-IQsequenceswerescannedwithsagittallumbar.Rectangular ROIwereoutlinedonFatFracmaps,FFsweremeasuredthreetimesonvertebraebodyoflumbar1(L1),L2,L3,L4,L5,andtheFF ofeachlumbarwasrespectivelyaveragedtoanalyzethedifferencewithinandbetweengroups.Results Theageamongthethree groups(F=13.414,P=0.000)werestatisticallysignificantdifference.Inbothcomparisons,theagewassignificantdifferencebetweengroupA andB,aswellasbetweengroupAandC,butnotbetweengroupBandC.TheFFofL1-L5withineachgroupwerenotstatistically significantdifference(F=0.680,0.863,0.539,P=0.608,0.490,0.707),whilealldifferencesbetweeneachgroupwithFFofL1-L5 werestatisticalsignificance(F=12.758,9.646,5.195,8.048,8.849,P=0.000,0.000,0.008,0.001,0.000).Comparisonbetweenthe groups,theFFofL3andL5inthegroupAandBwerenotstatisticallydifferent,aswellastheL2,L3,L4inthegroupBandC, whiletheothersbetweentwogroupswerestatisticallysignificantdifference.Conclusion Astheageincreases,BMDgraduallydecreases,whilethe FFofL1-L5graduallyincreases.ItisofaccuratelyevaluatelumbarvertebraeFFbyIDEAL-IQ,whichmayhelppredictOP.