医学成像及其在功能疾病和肿瘤诊疗中的应用
...实验测到的核反应10B+n=7Li+α中,7Li第一激发态的瞬发γ(478keV)角分布数据(7Li第一激发态的半寿命为73fs)进行分析和处理,用现在发射型CT(ECT)的方法实现对治疗的在线监督。 医学影像学在治疗计划系统中的应用也十分广泛。北...
合作平台;医学论文;基础医学论文;生物物理学PET/MR诊断恶性肿瘤的初步临床应用:与PET/CT自身对照比较
...源穿透扫描50~60min,层厚5mm。PET扫描结束后,立刻执行120KeV,80mA,0.4s/Helical全身CT扫描,层厚5mm。其中9例患者由机器人辅助,保持全身PET/MR扫描体位不变[6]。 1.4图像处理和分析 PET图像三维重建后,在GEAW工作站上实现PET/C...
医源资料库;在线期刊;中华现代影像学杂志;2011年第8卷第3期99mTcSestamibiBreastImagingfortheExaminationofPatientswithDenseandFattyBreasts:MulticenterStudy1
...x128matrixbyusingahigh-resolutioncollimatoranda10%energywindowcenteredat140keV.Scintimammographicimageswerereadatthesitesbytheprincipalinvestigator(includingI.K.,J.V.M.,S.L.E.)ateachsite(institutionalresults).Additionally,twogroupsofthreenuclearmedicinephysicianswhowereblindedtothesubjects’clinica...
医源资料库;在线期刊;放射学杂志;2003年1月第226卷第1期Folicacidenrichmentofbreaddoesnotappeartoaffectzincabsorptioninyoungwomen
...mwas0.2counts·s-1·Bq-165Zn.Theenergywindowwassetatalowerlevelof80keV,allowingdetectionofthecomptonevents(inelasticscattered-photons)intheplasticscintillatorsfromboth511and1115keVradiationfrom65Zn.Noupperenergylimitwasused.Tominimizecontaminationbyatmosphericbackgroundactivity,thesubjectssh...
医源资料库;在线期刊;美国临床营养学杂志;2001年74卷第1期Comparisonofmethodsforassessingbody-compositionchangesover1yinpostmenopausalwomen
...eveacongruentbeamofstabledual-energyradiationwitheffectiveenergiesof40and70keV.Thescannerwascalibrateddailyagainstthestandardcalibrationblocksuppliedbythemanufacturer.Inaddition,aspinephantomwasscanneddailythroughoutthestudyperiodandtheCVfortheBMDofthespinephantomwas0.6%.Eachsubjectwasscannedtwicewi...
医源资料库;在线期刊;美国临床营养学杂志;2000年72卷第2期放射性粒子植入治疗肿瘤的进展
...物理特性所决定的:①125I释放γ线,其平均能量为28keV,属于低能放射性同位素,有穿透到局部组织间的作用,疗效较好,损伤小;②125I半衰期较长,为60d,可提供200d左右的持续照射(3个半衰期),便于临床的使用和保...
医源资料库;在线期刊;滨州医学院学报;2007年第30卷第2期Long-termproteinintakeanddietarypotentialrenalacidloadareassociatedwithbonemodelingandremodelingattheproximalradiusinhealthychildren
...reaAnXCT-2000device(StratecInc,Pforzheim,Germany)equippedwithalow-energy(38keV)X-raytubewasusedtoconductthepQCTanalysis(1416)onthenondominantforearm.Theeffectiveradiationwas0.1µSvfromaradiationsourceof45kVat15µA.Thescannerwasplacedontheforearm,wherethedistancefromtheulnarstyloidproce...
医源资料库;在线期刊;美国临床营养学杂志;2005年82卷第5期ClinicalandPathologicFeaturesofFamilialInterstitialPneumonia
...CareMed2001;164:1722–1727.作者:MarkP.Steele,MarcyC.Speer,JamesE.Loyd,Kev
医源资料库;在线期刊;美国呼吸和危急护理医学;2005年第171卷第11期High-ResolutionX-RayMicrotomographyIsaSensitiveMethodtoDetectVascularCalcificationinLivingRatsWithChronicRenalFailure
...m,boththepolychromaticX-raysource(focalspotsize5µm,energyrange20to100keV)andthedetector(charge-coupleddevicecamera2.3kx4k)rotatearoundtheanimal.Detailsaboutthemicro-CTequipmenthavebeenpublishedelsewhere(www.skyscan.be).InVivoScanningParametersForinvivostudiesanesthetizedratswereplacedontheirba...
医源资料库;在线期刊;动脉硬化血栓血管生物学杂志;2006年第26卷第9期Anoveldualradio-andstable-isotopemethodformeasuringcalciumabsorptioninhumans:comparisonwiththewhole-bodyradioisotoperetentionmethod
...chdetectorwithalowerlevelcutoffjustabovetheComptonedgefor99mTcradiation(141keV).Thedetectorefficiencyconstancy(betterthan1%)wascheckedoneverymeasurementdaybyusingthe60Costandard.Countingefficiencywasestablishedthroughmeasurementsofwater-filledphantomswithweights(55,67,and88kg)andoutlinesapproximatin...
医源资料库;在线期刊;美国临床营养学杂志;2003年77卷第2期