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ID:32353187
大小:4.49 MB
页数:45页
时间:2019-02-03
《ct低管电压扫描对辐射剂量与图像质量的影响与其在脑cta的临床应用研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、&⋯E学院《±学桂论tc二纽m川割像的{1_}fIlk艘、cT值、图像噪声、CNR、SNR及辐射剂量的差异;三绀削像川主观评分差异用非参数秩和检验进行比较:2名观察者fEIj的观察一敛性采川Kappa榆验进行评价.K>O60认为墩性较好。P2、学意义∽值均<[).001),f嚏不同管电3、流埘cT值影响1;犬.{_4、{【削蔗异无统计学意义(P值均>0.05)。图像噪声与管f乜流及辐射剂量均肇负柑关,随酋管电流或辐射剂蛀的增加『酊降低。当管电流I矧定时,l期像噪声水平H1)kV斟i>】Ookv自1)】20kV纽,El差异均县有统训学意义(P值均为0000):当噪』H水’r一致时,辐射剂鞋:-{OkV组5、lvedose,I:D)较c组分别降低6397%、6454%、64.65%厦35.6矾、3527‘b、3535%。A、趴ci组『1{I』的17均叽P发邮差锌均其有统计学意义。客观图像质量结果:A、8、c二组患肯中,腑血管Cl值黼着管lnI丘的降低碾著增高,n组削差异均具有统计学意义(P值均<0.001)。虽然6、雩7、像噪声水平随着管lb压的降低而显著增高(P值均(().05).佩二三组患肯择{;}{f似cNR及SNR差异无统计学意义(1,值均>00j),t:脱图像质睦结粜:随着管电压晌降低.血管边缘锐利程度I成8、低。微小分支血管娃示增多.MA、B、c二组脑动脉蘑建图像质量、l割像的牲体质量,5乏对旧像的冷断信心!组差异并无统计学意义(r值均>o.05)。结论低管电压脑L'TA¨拼不仅町以显著增jJ【¨血管强化值及n与删边组织的对比,而n蚓像整体质量及诠蜥信心4i受够响,并能大幅度的I:{I!低辐射剂量。I^l此,其临J术”r行性价值较高.推荐常规他用。关键词体壕擞影术,X线训算机:辐射剂量;舒lU捱;圈像质蛙;脑动脉TheInfluenceofLowTubeVoltageOilImageQualityandRadia9、tionDoseandjbClinicalApplicationinCerebralComputedTomographyAogiography【AbstractobjectiveToinvestigatetheinfluenceoflowtubevoltageOllimagequalil、andradiationdoseatcerebralCTangiogmphy(CTA)MethodsIExperimentalstudy:Weprepared6iodineconcentrationsbydilutingco10、ntrastmaterialwithnorlll[1】salineA11contraslmaterialsolutionswerescannedwitha16-sectionmulti—detectorCT(MDCT)scannerat80.100andl20kV.witbtubecurrental150.200250300,350and400mATheimageCTvaluesandCTdosesindexvolumeICl’Dlv01)wereol!iectivelymeasuredForimagenoi11、se(SDstandarddeviationofCTnumber)measurementtheCTP468moduleinCatphan500phantomwasscannedwithlbesoftiescanprotocalsasmentionedaboveForstatisticalanalysisweusedtheone—wayANOVAtocomparethedifferencesofCTvalues.noiseandC/Dlvolamlmggroup80kV.group100kvandgroup1212、0kV.Thelinearcorrelationkvasusedtoanalysetherelationshipbetweennioseandtubecurrent,andtherelationshipbetweennoiseandCFDlvol2Clinicalstudy:BetweenJuneandDecemberin2011.atotalof150patients(80malesand61fe
2、学意义∽值均<[).001),f嚏不同管电
3、流埘cT值影响1;犬.{_
4、{【削蔗异无统计学意义(P值均>0.05)。图像噪声与管f乜流及辐射剂量均肇负柑关,随酋管电流或辐射剂蛀的增加『酊降低。当管电流I矧定时,l期像噪声水平H1)kV斟i>】Ookv自1)】20kV纽,El差异均县有统训学意义(P值均为0000):当噪』H水’r一致时,辐射剂鞋:-{OkV组5、lvedose,I:D)较c组分别降低6397%、6454%、64.65%厦35.6矾、3527‘b、3535%。A、趴ci组『1{I』的17均叽P发邮差锌均其有统计学意义。客观图像质量结果:A、8、c二组患肯中,腑血管Cl值黼着管lnI丘的降低碾著增高,n组削差异均具有统计学意义(P值均<0.001)。虽然6、雩7、像噪声水平随着管lb压的降低而显著增高(P值均(().05).佩二三组患肯择{;}{f似cNR及SNR差异无统计学意义(1,值均>00j),t:脱图像质睦结粜:随着管电压晌降低.血管边缘锐利程度I成8、低。微小分支血管娃示增多.MA、B、c二组脑动脉蘑建图像质量、l割像的牲体质量,5乏对旧像的冷断信心!组差异并无统计学意义(r值均>o.05)。结论低管电压脑L'TA¨拼不仅町以显著增jJ【¨血管强化值及n与删边组织的对比,而n蚓像整体质量及诠蜥信心4i受够响,并能大幅度的I:{I!低辐射剂量。I^l此,其临J术”r行性价值较高.推荐常规他用。关键词体壕擞影术,X线训算机:辐射剂量;舒lU捱;圈像质蛙;脑动脉TheInfluenceofLowTubeVoltageOilImageQualityandRadia9、tionDoseandjbClinicalApplicationinCerebralComputedTomographyAogiography【AbstractobjectiveToinvestigatetheinfluenceoflowtubevoltageOllimagequalil、andradiationdoseatcerebralCTangiogmphy(CTA)MethodsIExperimentalstudy:Weprepared6iodineconcentrationsbydilutingco10、ntrastmaterialwithnorlll[1】salineA11contraslmaterialsolutionswerescannedwitha16-sectionmulti—detectorCT(MDCT)scannerat80.100andl20kV.witbtubecurrental150.200250300,350and400mATheimageCTvaluesandCTdosesindexvolumeICl’Dlv01)wereol!iectivelymeasuredForimagenoi11、se(SDstandarddeviationofCTnumber)measurementtheCTP468moduleinCatphan500phantomwasscannedwithlbesoftiescanprotocalsasmentionedaboveForstatisticalanalysisweusedtheone—wayANOVAtocomparethedifferencesofCTvalues.noiseandC/Dlvolamlmggroup80kV.group100kvandgroup1212、0kV.Thelinearcorrelationkvasusedtoanalysetherelationshipbetweennioseandtubecurrent,andtherelationshipbetweennoiseandCFDlvol2Clinicalstudy:BetweenJuneandDecemberin2011.atotalof150patients(80malesand61fe
5、lvedose,I:D)较c组分别降低6397%、6454%、64.65%厦35.6矾、3527‘b、3535%。A、趴ci组『1{I』的17均叽P发邮差锌均其有统计学意义。客观图像质量结果:A、8、c二组患肯中,腑血管Cl值黼着管lnI丘的降低碾著增高,n组削差异均具有统计学意义(P值均<0.001)。虽然
6、雩
7、像噪声水平随着管lb压的降低而显著增高(P值均(().05).佩二三组患肯择{;}{f似cNR及SNR差异无统计学意义(1,值均>00j),t:脱图像质睦结粜:随着管电压晌降低.血管边缘锐利程度I成
8、低。微小分支血管娃示增多.MA、B、c二组脑动脉蘑建图像质量、l割像的牲体质量,5乏对旧像的冷断信心!组差异并无统计学意义(r值均>o.05)。结论低管电压脑L'TA¨拼不仅町以显著增jJ【¨血管强化值及n与删边组织的对比,而n蚓像整体质量及诠蜥信心4i受够响,并能大幅度的I:{I!低辐射剂量。I^l此,其临J术”r行性价值较高.推荐常规他用。关键词体壕擞影术,X线训算机:辐射剂量;舒lU捱;圈像质蛙;脑动脉TheInfluenceofLowTubeVoltageOilImageQualityandRadia
9、tionDoseandjbClinicalApplicationinCerebralComputedTomographyAogiography【AbstractobjectiveToinvestigatetheinfluenceoflowtubevoltageOllimagequalil、andradiationdoseatcerebralCTangiogmphy(CTA)MethodsIExperimentalstudy:Weprepared6iodineconcentrationsbydilutingco
10、ntrastmaterialwithnorlll[1】salineA11contraslmaterialsolutionswerescannedwitha16-sectionmulti—detectorCT(MDCT)scannerat80.100andl20kV.witbtubecurrental150.200250300,350and400mATheimageCTvaluesandCTdosesindexvolumeICl’Dlv01)wereol!iectivelymeasuredForimagenoi
11、se(SDstandarddeviationofCTnumber)measurementtheCTP468moduleinCatphan500phantomwasscannedwithlbesoftiescanprotocalsasmentionedaboveForstatisticalanalysisweusedtheone—wayANOVAtocomparethedifferencesofCTvalues.noiseandC/Dlvolamlmggroup80kV.group100kvandgroup12
12、0kV.Thelinearcorrelationkvasusedtoanalysetherelationshipbetweennioseandtubecurrent,andtherelationshipbetweennoiseandCFDlvol2Clinicalstudy:BetweenJuneandDecemberin2011.atotalof150patients(80malesand61fe
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