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时间:2020-05-19
《能谱 CT 对粪便掩盖背景下结肠息肉显示能力的体模研究.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、墨兰堡兰璧查生箜鲞筻5期JMedImagingV01.25No.52015能谱CT对粪便掩盖背景下结肠息肉显示能力的体模研究左倩,孙浩然,于晓坤,卢宏亮,邵荣江(1.天津中医药大学第一附属医院放射科天津300193;2。天津医科大学总医院放射科天津300052;3.天津市第五中心医院放射科天津300450;4.天津中医药大学第一附属医院外二科天津300193)【摘要】目的评价宝石能谱成像(GSI)单能量及质量控制(QC)图像对粪便掩盖背景下结肠小息肉的显示能力,确定显示结肠息肉最佳单能量图像。方法离体猪结肠结扎获得2O个模拟息肉,向肠管中灌入碘水一玉米糊混合物,使用宝石CT扫
2、描,提取40~140keV单能量及QC图像,在工作站获得多平面重建(MPR)图像、碘基图和水基图,比较不同图像噪声、对比噪声比(CNR)及息肉检出率。结果图像噪声在70keV达相对低点,明显低于40、50、60、75、80、85keV图像噪声(F一443.946,P<0.05)。图像CNR在70keV最高,明显高于除60keV以外单能量图像(F一15.138,P<0.05)。70keV(最佳CNR单能量图像)图像噪声低于Qc图像噪声(t一一2.807,P3、率为75(15/20),高于其它单能量图像。结论GSI具有显示粪便掩盖背景下结肠小息肉的能力,GSI-CT显示粪便掩盖背景下结肠息肉的最佳单能量图像为70keV图像。【关键词】能谱成像;CT结肠成像;对比噪声比;结肠息肉中图分类号:R574.62;R814.42文献标识码:A文章编号:1006—9011(2015)05—0897—05TheefficacyofspectralCTcolonographyindetectingphantompolypsmaskedbybowelfecesZUOQian,SUNHao—ran,yUXiao—kun。,LUHong—liang,SH4、AORong-jiang1.DepartmentofRadiology,FirstTeachingHospitalofTianjinUniversityofTraditionalChineseMedicine,Tianji300193,P.R.China2.DepartmentofRadiology,TianjinMedicalUniversityGeneralHospital,Tianjin,300052,P.R.China3.DepartmentofRadiology,TianjintheFifthCentralMeddicalHospital,Tianjin,300455、0,P.R.China4.EmergencySurgery,FirstTeachingHospitalofTianjinUniversityofTraditionalChineseMedicine,Tianjin300193,P.R.China[Abstract]ObjectiveToevaluatetheefficacyofmonochromaticenergyimagesandqualitycontrol(QC)imagesofGem—stoneSpectralImaging(GSI)indetectingsmallphantomcolonicpolypsmaskedby6、bowelfeces,andtochoosetheoptimalmonochromaticenergyimage.MethodsAseriesoftwentyphantompolypssizedfrom1mmto10mmwereestablishedbyligationonanisolatedsegmentofporcinecolon.Simulatediodine-taggedfecalmaterialwasfilledintothephantom.VolumedatawereacquiredonaHighDefinitionCTscanner.monochromatice7、nergyimagesat4O~140keVandQCima—geswerereconstructed.Multiplanarreconstruction(MPR),iodine-basedimagesandwater-basedimageswerereconstruc—ted.Theimagenoiselevels,thecontrasttonoiseratios(CNR)andthedetectionrateofphantompolypswereassessedbytworadiologistsbl
3、率为75(15/20),高于其它单能量图像。结论GSI具有显示粪便掩盖背景下结肠小息肉的能力,GSI-CT显示粪便掩盖背景下结肠息肉的最佳单能量图像为70keV图像。【关键词】能谱成像;CT结肠成像;对比噪声比;结肠息肉中图分类号:R574.62;R814.42文献标识码:A文章编号:1006—9011(2015)05—0897—05TheefficacyofspectralCTcolonographyindetectingphantompolypsmaskedbybowelfecesZUOQian,SUNHao—ran,yUXiao—kun。,LUHong—liang,SH
4、AORong-jiang1.DepartmentofRadiology,FirstTeachingHospitalofTianjinUniversityofTraditionalChineseMedicine,Tianji300193,P.R.China2.DepartmentofRadiology,TianjinMedicalUniversityGeneralHospital,Tianjin,300052,P.R.China3.DepartmentofRadiology,TianjintheFifthCentralMeddicalHospital,Tianjin,30045
5、0,P.R.China4.EmergencySurgery,FirstTeachingHospitalofTianjinUniversityofTraditionalChineseMedicine,Tianjin300193,P.R.China[Abstract]ObjectiveToevaluatetheefficacyofmonochromaticenergyimagesandqualitycontrol(QC)imagesofGem—stoneSpectralImaging(GSI)indetectingsmallphantomcolonicpolypsmaskedby
6、bowelfeces,andtochoosetheoptimalmonochromaticenergyimage.MethodsAseriesoftwentyphantompolypssizedfrom1mmto10mmwereestablishedbyligationonanisolatedsegmentofporcinecolon.Simulatediodine-taggedfecalmaterialwasfilledintothephantom.VolumedatawereacquiredonaHighDefinitionCTscanner.monochromatice
7、nergyimagesat4O~140keVandQCima—geswerereconstructed.Multiplanarreconstruction(MPR),iodine-basedimagesandwater-basedimageswerereconstruc—ted.Theimagenoiselevels,thecontrasttonoiseratios(CNR)andthedetectionrateofphantompolypswereassessedbytworadiologistsbl
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