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时间:2020-06-04
《评价迭代重建法与滤过反投影法在冠状动脉CTA检查中的价值.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、放射学实践2014年6月第29卷第6期RadiolPractice,J,.Vol!.663·,血管影像学评价迭代重建法与滤过反投影法在冠状动脉CTA检查中的价值严诚,陈刚,丁玉芹,杨雪,陆秀良,张利军,曾蒙苏【摘要】目的:对行冠状动脉CTA检查的患者原始数据应用低剂量自适应迭代重建技术(AIDR)与滤过反投影法(FBP)两种方法的图像进行比较,旨在了解迭代重建算法的图像质量及其临床应用价值。方法:26例临床疑似稳定性心绞痛患者采用320排CT行冠状动脉CTA检查。利用AIDR重建的常规x线剂量方案扫描,对采
2、集得到的原始数据分别用AIDR和FBP两种方法进行图像重建。测量升主动脉开口、右冠状动脉近段、左冠状动脉主干、右冠状动脉中段、左前降支近段及左回旋支近段的CT值、背景sD并计算分析SNR、CNR值。比较两者的图像质量。结果:26例患者都在一次心动周期完成冠状动脉检查。在血管各节段测得的平均CT值差异无统计学意义(P>O.05),背景sD值的差异有统计学意义(P3、BP(3.594-0.61)(P<0.01)。结论:应用AIDR重建法的图像质量优于FBP重建法,迭代重建技术可明显降低图像噪声,改善影像质量并具有降低辐射剂量的作用。【关键词】冠状动脉疾病;血管造影术;体层摄影术,x线计算机;图像处理,计算机辅助【中图分类号】R541.4;R543.3;R543.5;R814.3;R816.2【文献标识码】A【文章编号】1000-0313(2014)06—0663—05D0I:10.13609/.cnki.1000—0313.2O14.O6.021Evaluationof4、iterativeAIDRandfilteredbackprojectionimagealgorithmoncoronarycomputedtomographyangiographyYANCheng,CHENGang,DINGYu—qin,eta1.DepartmentofDiagnosticRadiology,ZhongshanHospital,FudanUniversityandShanghaiInstituteofMedicalImaging,Shanghai200032,P.R.China[Abst5、ract]Objective:Tocomparetheimagequalitiesofcoronarycomputedtomographyangiography(CCTA)usingadaptiveiterativedosereduction(AIDR)andfilteredbackprojection(FBP)algorithmandtoevaluatetheclinicalvalueofAIDR.Methods:Twenty-sixpatientswithsuspectedstableanginaund6、erwentregularradiationdosescanningprotocolon320MDCTscanner.ThecollectedrawdatawerethenreconstructedwithAIDRandFBPrespectively.CTvalueandback—groundSDvalueweremeasuredattheaortaroot,proximalandmiddlerightcoronaryartery,leftmaincoronaryartery,prox—ima1leftan7、teriorarterv,aswellasproximal1eftcircumflexartery.SNRandCNRwerealsocalculated.Twoobserverscom—paredthequalityoftheimageswithsubjectivegrading.Results:Twenty-sixpatientscompletedCCTAwithinoneheartbeat.TheaverageCTattenuationmeasuredatsegmentsofcoronaryarter8、ieswasnotstatisticallydifferent(P>-O.05).Back—groundSDvalue.SNRandCNRcalculatedwerestatisticallydifferent(P<0.001).Thesubjectivegradingofimagequalitiesbetweentwogroupswere3.73_4-0.49forAIDRand3.59±0.61forFBP,
3、BP(3.594-0.61)(P<0.01)。结论:应用AIDR重建法的图像质量优于FBP重建法,迭代重建技术可明显降低图像噪声,改善影像质量并具有降低辐射剂量的作用。【关键词】冠状动脉疾病;血管造影术;体层摄影术,x线计算机;图像处理,计算机辅助【中图分类号】R541.4;R543.3;R543.5;R814.3;R816.2【文献标识码】A【文章编号】1000-0313(2014)06—0663—05D0I:10.13609/.cnki.1000—0313.2O14.O6.021Evaluationof
4、iterativeAIDRandfilteredbackprojectionimagealgorithmoncoronarycomputedtomographyangiographyYANCheng,CHENGang,DINGYu—qin,eta1.DepartmentofDiagnosticRadiology,ZhongshanHospital,FudanUniversityandShanghaiInstituteofMedicalImaging,Shanghai200032,P.R.China[Abst
5、ract]Objective:Tocomparetheimagequalitiesofcoronarycomputedtomographyangiography(CCTA)usingadaptiveiterativedosereduction(AIDR)andfilteredbackprojection(FBP)algorithmandtoevaluatetheclinicalvalueofAIDR.Methods:Twenty-sixpatientswithsuspectedstableanginaund
6、erwentregularradiationdosescanningprotocolon320MDCTscanner.ThecollectedrawdatawerethenreconstructedwithAIDRandFBPrespectively.CTvalueandback—groundSDvalueweremeasuredattheaortaroot,proximalandmiddlerightcoronaryartery,leftmaincoronaryartery,prox—ima1leftan
7、teriorarterv,aswellasproximal1eftcircumflexartery.SNRandCNRwerealsocalculated.Twoobserverscom—paredthequalityoftheimageswithsubjectivegrading.Results:Twenty-sixpatientscompletedCCTAwithinoneheartbeat.TheaverageCTattenuationmeasuredatsegmentsofcoronaryarter
8、ieswasnotstatisticallydifferent(P>-O.05).Back—groundSDvalue.SNRandCNRcalculatedwerestatisticallydifferent(P<0.001).Thesubjectivegradingofimagequalitiesbetweentwogroupswere3.73_4-0.49forAIDRand3.59±0.61forFBP,
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