ABSTRACT
Objective ToinvestigatethevalueofDWIinthedifferentialdiagnosisofmalignantovarianepithelialtumorsfrombenign ovarianepithelialtumors.Methods MRimagesof34patientswithovarianepithelialtumorsconfirmedbypathologywereanalyzed retrospectively.ThemeanADCvaluesofthesolidpartsofthetumorsweremeasured,comparedandanalyzedstatisticallybetweenthe benignandmalignantovarianepithelialtumors.Results ThesignalintensityofsolidpartsonDWIwassignificantlyhigherinmalignant ovarianepithelialtumorsthanthatinbenignovarianepithelialtumors(P＜0.05).Whenthebvaluewassetas0s/mm2,400s/mm2, 600s/mm2and800s/mm2,thesolidcomponentsofbenignovarianepithelialtumorsdidnotshowrestricteddiffusion,with mean ADCvalueof (1.52±0.65)×10－3 mm2/s.Restricteddiffusionswereobservedinthesolidpartsofmalignantovarianepithelial tumors,withmeanADCvalueof(0.98±0.28)×10－3 mm2/s.TheADCvaluesofsolidpartsweresignificantlylowerinmalignantovarian epithelialtumorsandthedifferencewasstatisticallysignificantbetweenthemalignantandbenigntumors(P＜0.05).Conclusion The signalintensityofsolidpartsonDWIissignificantlyhigherinmalignantovarianepithelialtumorsthanthatinbenignovarianepithelial tumors,buttheADCvaluesareopposite.DWIcanbeusedtodifferentiatebenignfrom malignantovarianepithelialtumors.
ABSTRACT
Objective:To evaluate the value of multilayer dynamic CT scan in the preoperative diagnosis and staging of rectal carcinoma.Methods: CT findings of a retrospective analysis of 38 cases with pathologically confirmed cancer, study characteristics of partial image, Adjacent tissue invasion and distant organ metastasis, And compared with postoperative pathology.Results:Intraluminal mass 15 cases, Intraluminal mass associated with of bowel wall thickening 12 cases, The a tumor breakthrough serosa layer and surrounding tissue invasion 7 cases; Tumor invasion of adjacent organs or with distant metastasis 4 cases; consistent rate compared with pathological was 81.5%(31/38).Conclusion: Multilayer enhanced CT scan is well consistent rate in the diagnosis and staging of rectal cancer compared with pathologic staging, Preoperative contrast enhanced CT scanning have guiding significance for clinical choice of surgical approach, With higher value of clinical application.