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ID:49227876
大小:5.65 MB
页数:5页
时间:2020-02-28
《自动协议选取能谱联合自适应迭代计算法重建技术降低腹部增强及血管成像辐射剂量及对比剂剂量的可行性.pdf》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、中国医学影像技术2017年第33卷第4期ChinJMedImagingTechnol,2017,Vol33,No4·603·?影像技术学FeasibilityofautomaticspectralimagingprotocolselectionandadaptivestatisticaliterativereconstructioninreducingradiationandiodinecontrastdoseinabdominalCTA1,ZUOZiwei1,XUYingjin1,WANGJianing1,LIUHuaijun2*,GUONing3YINXiaoping(1.CT/
2、MRIDivision,AffiliatedHospitalofHebeiUniversity,Baoding071030,China;2.DepartmentofMedicalImaging,theSecondHospitalofHeibeiMedicalUniversity,Shijiazhuang051005,China;3.GECTResearchCentre,Beijing100176,China)[Abstract]ObjectiveToinvestigatethefeasibilityofautomaticspectralimagingprotocolselection
3、(ASIS)andadaptivestatiaticaliterativereconstruction(ASiR)techniquetoreduceradiationdoseanddoseofcontrastagent.MethodsSixty-fourpatientsunderwentroutineabdominalexaminationwererandomlydividedintotwogroups.ThetestgroupusedASIStechnique,with30%ASiRand50%ASiRreconstructionalgorithm.Thecontrolgroupu
4、sed120kVptubevoltage,FBPreconstructionmethod.Thenoiseofliver,pancreas,sacrospinalmuscle,CNRofliverandpancreas,subjectiveimagescoreinarterialphaseandportalvenousphasewerecomparedbetweentheimageof70keV+30%ASIRandcontrolgroup.CNRofabdominalaortaanditsbranchs,CNRofportalvein,andsubjectiveimagescore
5、werestatisticallyanalyzedbetweenim-age55keV+50%ASiRandcontrolgroupinthearterialphaseandportalvenousphase.ResultsComparedwithcontrolgroup,CTdoseindexvolumeforarterialphaseandportalvenousphaseintestgroupdecreasedby23.68%,23.57%anddoselengthproductdecreasedby25.61%,18.45%,totalcontrastinjectiondec
6、reased16.86%,thenoiseofliver,pancre-asandsacrospinalmusclein70keV+30%ASiRwerelowerthanthoseofcontrolgroupinabdominalarterialandportalphase(allP<0.05).CNRofabdominalaorta,superiormesentericartery,celiacaxisandscorein55keV+50%ASiRwerehigherthanthoseofcontrolgroupinabdominalarterialphase(allP<0.05
7、),CNRofportalveinandscoreinportalphasehadnostatisticallydifference(allP>0.05).ConclusionCombiningofASISandASiRincluding70keV+30%ASiRand55keV+50%ASiR,imagesaresuperiortothatoftheconventional120kVp+FBPscanmodeforabdominalCTimageandv
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