能谱ct成像关键参数检测技术分析

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1、万方数据硕士学位论丈价方法相结合应用于三种不同方法下获得的基物质图像的噪声评价，以从不同角度了解三种方法获得的图像噪声变化和不同方法的物质分解特点。该研究对于推动能谱CT检测技术的发展、建立完善的噪声评价体系、优化基物质图像质量和提高临床诊断精度具有重要意义。关键词能谱CT多参数成像体模噪声评价噪声功率谱标准偏差物质分解基物质图像V万方数据硕士学位论文StudyonTestingTechniquesofSpectralCTImagingKeyParametersName-GaoHai-yingSupervisor：Prof．YuXiao-eABSTR

2、ACTComputedtomography(CT)hasbecomeoneofthemostimportantmethodsofmedicalimagingdiagnosis．Sinceseveralyears’continuousdevelopment，CThasachievedgreatprogressinthescanningspeed，precisionandscopeofconfirmeddiagnosis．However,therearemanyproblemsexistingintheCTimaging，suchassingleimag

3、ingparameters，lackingoffunctionimagingandbeamhardeningartifact，whichconfusedtheradiologistsforalongtime．TheclinicalapplicationofspectralCTisthekeymeanstosolvetheseproblems．ThetheoryofspectralCTisthatdifferentattenuationabsorptionappearswhenthematerialexposedindifferentlevelener

4、gyX-ray．Bythisway，itprovidesmoreclinicalimageinformation．SpectralCTscansmaterialbytwoormoredifferentX—rayenergy．Theattenuationabsorptionoforganizationpresentstherelevantvariationindifferentenergylevel．Thisvariationisquantifiableandidentification，basedonthis，wecangetmoreinformat

5、ionaboutthetestedmaterialSpectralCTtestingtechniqueisstillinthestageofcontinuallystudyexploration，comparedwiththespectralCTimagingtechnologydevelopmentandpopularization，isrelativelylagging．ThispaperintroducedtheimagingtechniquesandclinicalapplicationofspectralCTandfinishedthefo

6、llowingworkthatfocusedatthekeyimagingparametersofspectralCT：万方数据ABSTRACT(1)FocusingonthecharacteristicofthespectralCTkeyparameters，thispapercarriedonthepreliminaryexplorationstudyonthetechniqueofquantitativeanalysisabilityofspectralCTanddesignedthefollowingexperiments．Designeda

7、ndmadeaniodinesolutiontestingphantom．Thistestingphantomusesbottledpurewaterandiopamidol300contrastmediumthatiodineconcentrationis300mg／mLasrawmaterials．Keepingthetotalsolutionin600mL，numberedthewaterandinjected0，2，3，⋯8mLcontrastmediumtothewaterwithmedicalsyringe．Tofixedthesebot

8、tleswithtapeandfinishedthephantom．PutthephantomontheGE