CT在兽医的应用 ppt课件.ppt

Computedtomography(CT)inveterinarymedicineCT(计算机体层摄影)在兽医医学上的应用,H.vanBreeWL60,Bonewindow:WW3500;WL500,Advantages:优点Avoidingsuperimpositionofsurroundingstructures.避免环绕结构形成重影Superiortissuecontrast-densitydifference.优异的组织对比密度差异Possibilityofreconsindifferentplanes(2D,3D).对不同平面进行远程操作（2D，3D）Measurementspossible(density,surface,size).可以测量（密度，表面积，大小）,Disadvantages:缺点Radiationhazard.射线的危害Highcost?高成本？Accesstoequipment?有权使用设备否？Generalanaesthesia.全身麻醉Learningcurvedealingwithaxialpictures.学会处理轴线图像的曲线,(Dis)advantagesofCTCT的优缺点,RadiationdosefromCTCT射线的放射剂量,DatafromNRPB1992,Sagittalreconstructions弧矢重建,CT:2D-reconstructionsCT：二维重建,CT:3D-reconstructionsCT：三维重建,CTartefactsCT误差,Mostcommon:最常见Streakartefacts纹理Partialvolumeartefacts局部体积,Beamhardening射束硬化,WhyCT?为什么要做CT？,Anysituationwheresuperimpositionshouldbeavoided.被检结构不受邻近器官重叠干扰,Anysituationwheresuperimpositionshouldbeavoided.被检结构不受邻近器官重叠干扰Anysituationwheretheextensionofaprocessshouldbeevaluated.评估病程的进展。,WhyCT?为什么要做CT？,Anysituationwheresuperimpositionshouldbeavoided.被检结构不受邻近器官重叠干扰Anysituationwheretheextensionofaprocessshouldbeevaluated.无论什么情况都要评估病程进展。CTguidedbiopsies.CT可以引导活组织检查。Evaluationoftreatment/follow-up.评估治疗效果/追踪观察,WhyCT?,WhenCTinsmallanimals?小动物何时做CT？,Affectionsoftheskull颅部受影响Brain脑Splanchnocranium咽颅Nasalcavity鼻腔Spinalproblems脊柱问题Orthopaedics矫形外科Detectionoffragments碎片检测Elbow肘Tarsus跗节Other其他,Asymmetrylatventricles=“mass-effect”侧脑室不对称=“肿块影响”,Contrastenhancement对比增强,Brainpathology脑部病理,IndicationsforCTCT的应用,Affectionsoftheskull颅部受影响Brain脑Splanchnocranium咽颅Nasalcavity鼻腔Spinalproblems脊柱问题Orthopaedics整形外科Detectionoffragments碎片检测Elbow肘Tarsus跗节Other其他,IndicationsforCTCT的应用,Affectionsoftheskull颅部受影响Brain脑Splanchnocranium咽颅Nasalcavity鼻腔Spinalproblems脊柱问题Orthopaedics整形外科Detectionoffragments碎片检测Elbow肘Tarsus跗节Other其他,CTtarsocruralOCD分离性骨软骨炎，跗腕部骨软骨炎的CT,Distallesion远端损伤,Dorsallesion背侧损伤,Proximallesion近端损伤,Exactlocation精确定位Size+extend尺寸+扩大Numberoffragments碎片数量,Inflammation炎症,Softtissueswelling软组织肿胀,Localextensionofneoplasm螯生物的局部增大,Metastases转移灶,Follow-up追踪观察,CThorseCT检查马,Limitations:局限Size大小Weight体重,IndicationsforCThorse马CT的应用,Skull颅部Dentalproblems牙齿问题Sinusproblems鼻窦问题Etmoidproblems筛骨问题(Brain)脑部Extremities四肢Fragments?Navicular,anybodypart碎片？足舟骨炎，其他部位Complexfractures复合骨折,Sinusitis鼻窦炎,Dentalproblems牙齿问题,Toothfracture牙齿断裂,BilateralfractureM1Foodsinusmaxillaris,.,IndicationslimbsCThorse马四肢CT的应用,Feet/distallimb(tillcarpus?-tarsus?):脚/肢远端（到腕？-跗部？）fracture(spiral)螺旋骨折fragments碎片OCD分离性骨软骨炎sesamoids籽骨navicularbone足舟骨炎softtissues?.软组织？,SpiralP1fracture螺旋状P1骨折,SpiralP1fracture螺旋状P1骨折,PET-CT正电子发射计算机断层显像仪,PETCT,positronemissiontomography正电子发射计算机断层显像技术-raysMetabolism新陈代谢,computedtomographyCT计算机X线断层摄影术X-raysAnatomy解剖学,PET-CT,LocalisationofActivity定位,Imagefusion图象融合Combinedsystems复合系统CT/MRI/SPECT:dataacquiredatthesamescanningsession:nomotion!CT/MRI/SPECT:：扫描过程中同期获得数据（无需移动）ImagefusionwithsoftwareprogramsManual-automatical人工-自动CT,TCT:anatomicallocalization自动定位,LocalisationwithTransmissionComputedTomography:TCT透射式计算机断层的定位,ZrichUniversity,Radiother