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时间:2020-04-12
《《腹部能谱 CT 不同低剂量辐射和管电压对图像视觉的影响》.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、医学影像学杂志2015年第25卷第5期JMedImagingVo1.25No.52015腹部能谱CT不同低剂量辐射和管电压对图像视觉的影响董鑫,吕国士。,王海辰,张习文。(1.承德医学院研究生院河北承德067000;2.中国人民解放军第251医院影像科河北张家口075000)【摘要】目的评估低管电压腹部能谱(cT)扫描的辐射剂量,图像质量和视觉对比以及显示设置优化效果。方法157例患者随机分为3个不同的CT组。52例进行了120kVp的CT扫描,53和52例患者分别接受低剂量100kVp和80kVp的CT扫描。每组的有效剂量(ED)、图像噪声、CT衰减、各器官的信号噪声比(sNR)均使用Du
2、nnett法进行了比较。组问进行定性分析。结果100kVp和80kVp两组的有效剂量分别降低了22和37。组间的SNR没有显著的差异(120kVp:13.8_-.4-3.5;100kVp:13.9±3.3;80kVp:13.5±2.9;P>O.05)。然而,除了lO0kVp的图像,120kVp的图像和所有其他图像之间存在显著差异(P3、识码:A文章编号:1006—90¨(2015)05—0821-05Effectofdifferentlow。doseradiationandtubevoltageonabdominalspectralCTinimagevisionDoNGX,LyUGuo—shi,WANGHai—chen,ZHANGXi—wen1.ChengdemedicalUniversity,Chengde067000,P.R.China2.CenterofImage251HospitalofChinesePLA,ZhangJiangkou075000,P.R.China[Abstract]ObjectiveToeval4、uatetheradiationdose,imagequality,andinfluenceonvisualcontrastoflowtubevoltageabdominalcomputedtomography(CT)andtheeffectsofdisplayingsettingoptimization.MethodsOnehundredandfifty—sevenpatientswererandomlyassignedtothreeprotocols.Fifty—twopatientsunderwenta120kVpprotocol,and53and52patientsunderwent5、low—doseprotocolswith100and80kVp,respectively.Theeffectivedose(ED),imagenoise,CTat—tenuation,andsignal—to—noiseratio(SNR)ofeachorganofeachprotocolwerecomparedusingDunnett’Stest.Qualitativeanalysisbetweentheprotocolswasalsoperformed.ResultsTheEDofthe100kVpand80kVpprotocolswere22and37%reduced,respect6、ively.TherewerenosignificantdifferencesintheSNRbetweentheprotocols(120kVp:13.8±3.5;100kVp:13.9±3.3;8OkVp:13.5±2.9;P>O.05).However,thereweresignificantdifferencesincontrastfamiliaritybetweenthe120kVpimagesandalltheotherimages,except100kVpimages,withoptimizeddisplayingsettings(P7、ominalCT,an80Kvpsettingoffersgreaterradiationdosereductionthana100kVpsetringwithoutsignificantdeteriorationoftheSNR;however,thevisualcontrastbetweentheorgansmightbechanged.[Keywords]Gemspectrum;AbdominalCT;
3、识码:A文章编号:1006—90¨(2015)05—0821-05Effectofdifferentlow。doseradiationandtubevoltageonabdominalspectralCTinimagevisionDoNGX,LyUGuo—shi,WANGHai—chen,ZHANGXi—wen1.ChengdemedicalUniversity,Chengde067000,P.R.China2.CenterofImage251HospitalofChinesePLA,ZhangJiangkou075000,P.R.China[Abstract]ObjectiveToeval
4、uatetheradiationdose,imagequality,andinfluenceonvisualcontrastoflowtubevoltageabdominalcomputedtomography(CT)andtheeffectsofdisplayingsettingoptimization.MethodsOnehundredandfifty—sevenpatientswererandomlyassignedtothreeprotocols.Fifty—twopatientsunderwenta120kVpprotocol,and53and52patientsunderwent
5、low—doseprotocolswith100and80kVp,respectively.Theeffectivedose(ED),imagenoise,CTat—tenuation,andsignal—to—noiseratio(SNR)ofeachorganofeachprotocolwerecomparedusingDunnett’Stest.Qualitativeanalysisbetweentheprotocolswasalsoperformed.ResultsTheEDofthe100kVpand80kVpprotocolswere22and37%reduced,respect
6、ively.TherewerenosignificantdifferencesintheSNRbetweentheprotocols(120kVp:13.8±3.5;100kVp:13.9±3.3;8OkVp:13.5±2.9;P>O.05).However,thereweresignificantdifferencesincontrastfamiliaritybetweenthe120kVpimagesandalltheotherimages,except100kVpimages,withoptimizeddisplayingsettings(P7、ominalCT,an80Kvpsettingoffersgreaterradiationdosereductionthana100kVpsetringwithoutsignificantdeteriorationoftheSNR;however,thevisualcontrastbetweentheorgansmightbechanged.[Keywords]Gemspectrum;AbdominalCT;
7、ominalCT,an80Kvpsettingoffersgreaterradiationdosereductionthana100kVpsetringwithoutsignificantdeteriorationoftheSNR;however,thevisualcontrastbetweentheorgansmightbechanged.[Keywords]Gemspectrum;AbdominalCT;
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