ThevalueofspectralCTimagingfordifferentiatingrenalfat-poor angiomyolipomafromchromophobecellrenalcarcinoma / 实用放射学杂志

ABSTRACT

Objective Toexplorethevalueofmulti-parameterquantitativeanalysisofspectralCTimaging (GSI)indifferentiatingrenal fat-poorangiomyolipoma(fpAML)andchromophobecellrenalcarcinoma(CCRC).Methods 42patientswithrenaltumor,including 25caseswithfpAMLand17caseswithCCRC,wereretrospectivelyanalyzed.Allofthem werescannedinGSImode.Themorphology differencesbetweenthefpAMLgroupandtheCCRCgroupwereanalyzed.GSIViewersoftwarewasusedtocalculatetheiodineconcentration (IC),thenormalizediodineconcentration(NIC),thesloperateofthespectrumenergycurveinthecorticalphase(CP)andmedullaryphase (MP),respectively.Thedifferencesofthoseparameterswerecomparedbetweenthetwogroupsusingthetwo-simplettest.Results Somecharacteristicsigns,suchas"blackspots"sign,cracksignandnecrosishadthevaluefordifferentialdiagnosis.IntheCP,theIC ofthefpAMLandCCRCgroupwere30.20±5.25vs19.97±4.01,theNICswere0.45±0.10vs0.32±0.06,andthesloperatesof spectrumenergycurveswere3.45±1.23vs2.42±0.48,respectively.IntheNP,theICofthefpAMLandCCRCgroupwere27.84± 8.07vs22.94±4.46,theNICswere0.58±0.17vs0.46±0.11,andthesloperatesofthespectrumenergycurveswere3.24±1.25vs 2.69±0.47,respectively.Thereweresignificantdifferencesbetween2groups(P<0.05).TheNICintheCPprovidedhighsensitivity (75%)andspecificity(86%)indifferentiatingfpAMLfrom CCRC,andtheareaundertheROCcurvewas0.886.Conclusion The focalcysticandnecrotic,enhanceduniformityanddegree,"blackspots"sign,cracksignand multi-parametersofGSI,includingIC, NIC,andthesloperateofthespectrumenergycurvecouldplayimportantroleindifferentialdiagnosisbetweenfpAMLandCCRC.