子宮頸癌MR灌注成像研究進展
...能力較強,缺點是對鄰近小血管信號變化太敏感,必須從ROI分析中排除,對對比劑外滲敏感,T1效應明顯,T1效應導致信號強度不能回到基線50%水平以下,導致γ擬合不適用。因此,對於微血管外漏較嚴重的病變,用SE-EPI較好...
醫源資料庫;在線期刊;中華現代影像學雜誌;2010年第7卷第6期孤立性肺結節動態增強灌注成像的研究現狀及進展
...適當加幾個序列,掃描結束後確定感興趣區(rigionofinterest,ROI)的原則是要儘可能大,以增加代表性,減少噪聲,同時要避開壞死、空洞及鈣化,由於每個病人因增強顯著區域的面積不同,所以它們的興趣區大小不固定,應測每個病...
醫源資料庫;在線期刊;中華現代影像學雜誌;2012年第9卷第4期MineralVolumeandMorphologyinCarotidPlaqueSpecimensUsingHigh-ResolutionMRIandCT
...agingSpecimenMRIwasperformedonaDMX-4009.4-Tvertical-boreNMRspectrometer/microimagingsystem(Bruker,Inc.),imaginginsalineat37°Cinthe15-mmradiofrequencycoilinsert.Specimenimagingconsistedofshort-repetitiontime(TR)spinecho(TR=700ms;echotime[TE]=12to13ms)andlong-TRmultiechospinecho(5evenlyspacedechoes;T...
醫源資料庫;在線期刊;動脈硬化血栓血管生物學雜誌;2005年第25卷第8期StereospecificandRedox-SensitiveIncreaseinMonocyteAdhesiontoEndothelialCellsbyHomocysteine
...reactiveoxygenspeciesproducedunderhyperhomocysteinemicconditionsmayinduceaproinflammatorysituationinthevesselwallthatinitiatesandpromotesatheroscleroticlesiondevelopment.Incubationofendothelialcellswithl-homocystein,butnotwithd-homocysteine,increasesreactiveoxygenspeciesaccumulation,activationofNF-B...
醫源資料庫;在線期刊;動脈硬化血栓血管生物學雜誌;2006年第26卷第3期Rapiddeterminationofrenalfiltrationfunctionusinganopticalratiometricimagingapproach
...ixelvaluesofintensityratioRfromaregionofbloodvessellumen(regionsofinterest,ROI)wereexportedintoPSI-PLOT(version6,SaltLakeCity,UT)foranalysis.Theimage-processingprocedureswereperformedinanequivalentmannerforallimagestoensuretheresultswerecomparable.ThetimeseriesintensityratiovaluesofaROIfromanimageti...
醫源資料庫;在線期刊;美國生理學雜誌;2007年第290卷第6期Endothelialß3Integrin-TargetedFumagillinNanoparticlesInhibitAngiogenesisinAtherosclerosis
...edbyautomatedthresholdingtoobtainaconsistentandobjectiveregion-of-interest(ROI)encompassingtheentireaorticwall,whichwasevaluatedbyvisualinspection.AminorityoftheROIs,typically2to3slicesof20,clearlyextendedbeyondtheaorticwallandwasexcludedfromfurtheranalysis.Imageintensitywasnormalizedrelativetoafidu...
醫源資料庫;在線期刊;動脈硬化血栓血管生物學雜誌;2006年第26卷第9期Furosemideincreaseswatercontentinrenaltissue
...TE=4mswereusedasanatomictemplatestofacilitateplacementsofregionsofinterest(ROI).Sliceswithclearlyvisualizedcortex,innermedulla,andoutermedullawerechosenforouranalysis.ROIsweremanuallyinsertedtoencompassthosethreeregionsandwerethenduplicatedtothewatermap,ADCmap,andBOLDmap,whichweremadeusingOsirisMedi...
醫源資料庫;在線期刊;美國生理學雜誌;2007年第290卷第5期疑似急性缺血性卒中患者64層螺旋CT灌注對梗死核心及半暗帶評估的研究
...靜脈注射對比劑後在一定時間內對興趣區(regionofinterest,ROI)層面進行連續的動態掃描;當對比劑到達腦組織後,其密度逐漸升高,而後在一定時間內達到峯值後逐漸降低,直至恢復到注射造影劑前腦組織密度水平。CT掃描後獲得的...
醫源資料庫;在線期刊;中華現代內科學雜誌;2010年第7卷第4期Functional,structural,andmetabolicabnormalitiesofthehippocampalformationinWilliamssyndrome
1SectiononIntegrativeNeuroimaging,2NeuroimagingCoreFacility,and3ClinicalBrainDisordersBranch,Genes,Cognition,andPsychosisProgram,NationalInstituteofMentalHealth,NIH,DepartmentofHealthandHumanServices,Bethesda,Maryland,USA.4NeurodevelopmentalSciencesLaboratory,DepartmentofPsychologicalandBrainScience...
醫源資料庫;在線期刊;臨牀研究雜誌;2005年第115卷第7期LongitudinalnoninvasivePET-based?cellmassestimatesinaspontaneousdiabetesratmodel
...ouslydescribed(58)usingDTBZ.Dataanalysisandinterpretation.Regionofinterest(ROI)analysisandimagereconstructionwereperformedwithASIProsoftwarefromCTIMolecularImaging.VisualanalysiswasperformedbyindividualsexperiencedinPETinterpretationusingcoronal,transverse,andsagittalreconstructions.ReconstructedPET...
醫源資料庫;在線期刊;臨牀研究雜誌;2006年第116卷第6期