1、Computed tomography (CT) in veterinary medicine CT(計(jì)算機(jī)體層攝影)在獸醫(yī)醫(yī)學(xué)上的應(yīng)用,H. van Bree WL 60,Bone window: WW 3500; WL 500,10,學(xué)習(xí)交流PPT,Advantages:優(yōu)點(diǎn) Avoiding superimposition of surrounding structures. 避免環(huán)繞結(jié)構(gòu)形成重影 Superior tissue contrast-density difference. 優(yōu)異的組織對(duì)比密度差異 Possibility of recons in different plan

2、es (2D, 3D). 對(duì)不同平面進(jìn)行遠(yuǎn)程操作（2D，3D） Measurements possible (density, surface, size). 可以測(cè)量（密度，表面積，大?。?Disadvantages:缺點(diǎn) Radiation hazard. 射線的危害 High cost? 高成本？ Access to equipment? 有權(quán)使用設(shè)備否？ General anaesthesia. 全身麻醉 Learning curve dealing with axial pictures. 學(xué)會(huì)處理軸線圖像的曲線,(Dis)advantages of CT CT的優(yōu)缺點(diǎn),11,學(xué)習(xí)交

3、流PPT,Radiation dose from CTCT射線的放射劑量,Data from NRPB 1992,12,學(xué)習(xí)交流PPT,Sagittal reconstructions 弧矢重建,CT: 2D-reconstructions CT：二維重建,13,學(xué)習(xí)交流PPT,CT: 3D-reconstructionsCT：三維重建,14,學(xué)習(xí)交流PPT,CT artefactsCT誤差,Most common:最常見(jiàn) Streak artefacts 紋理 Partial volume artefacts 局部體積,15,學(xué)習(xí)交流PPT,Beam hardening 射束硬化,16,學(xué)習(xí)

4、交流PPT,Why CT ? 為什么要做CT？,Any situation where superimposition should be avoided. 被檢結(jié)構(gòu)不受鄰近器官重疊干擾,17,學(xué)習(xí)交流PPT,Any situation where superimposition should be avoided. 被檢結(jié)構(gòu)不受鄰近器官重疊干擾 Any situation where the extension of a process should be evaluated. 評(píng)估病程的進(jìn)展。,Why CT ? 為什么要做CT？,18,學(xué)習(xí)交流PPT,Any situation where

5、 superimposition should be avoided. 被檢結(jié)構(gòu)不受鄰近器官重疊干擾 Any situation where the extension of a process should be evaluated. 無(wú)論什么情況都要評(píng)估病程進(jìn)展。 CT guided biopsies. CT可以引導(dǎo)活組織檢查。 Evaluation of treatment/follow-up. 評(píng)估治療效果/追蹤觀察,Why CT ?,19,學(xué)習(xí)交流PPT,When CT in small animals?小動(dòng)物何時(shí)做CT？,Affections of the skull 顱部受影響

6、Brain 腦 Splanchnocranium 咽顱 Nasal cavity 鼻腔 Spinal problems 脊柱問(wèn)題 Orthopaedics 矯形外科 Detection of fragments 碎片檢測(cè) Elbow 肘 Tarsus 跗節(jié) Other其他,20,學(xué)習(xí)交流PPT,Asymmetry lat ventricles = “mass-effect”側(cè)腦室不對(duì)稱=“腫塊影響”,Contrast enhancement 對(duì)比增強(qiáng),Brain pathology 腦部病理,21,學(xué)習(xí)交流PPT,Indications for CTCT的應(yīng)用,Affections of th

7、e skull 顱部受影響 Brain腦 Splanchnocranium 咽顱 Nasal cavity鼻腔 Spinal problems脊柱問(wèn)題 Orthopaedics 整形外科 Detection of fragments 碎片檢測(cè) Elbow 肘 Tarsus 跗節(jié) Other其他,22,學(xué)習(xí)交流PPT,Indications for CTCT的應(yīng)用,Affections of the skull 顱部受影響 Brain腦 Splanchnocranium 咽顱 Nasal cavity鼻腔 Spinal problems脊柱問(wèn)題 Orthopaedics 整形外科 Detecti

8、on of fragments 碎片檢測(cè) Elbow 肘 Tarsus 跗節(jié) Other其他,23,學(xué)習(xí)交流PPT,CT tarsocrural OCD分離性骨軟骨炎，跗腕部骨軟骨炎的CT,Distal lesion 遠(yuǎn)端損傷,Dorsal lesion 背側(cè)損傷,Proximal lesion 近端損傷,Exact location精確定位 Size + extend尺寸+擴(kuò)大 Number of fragments碎片數(shù)量,24,學(xué)習(xí)交流PPT,Inflammation炎癥,Soft tissue swelling 軟組織腫脹,25,學(xué)習(xí)交流PPT,Local extension of n

9、eoplasm螯生物的局部增大,26,學(xué)習(xí)交流PPT,Metastases 轉(zhuǎn)移灶,27,學(xué)習(xí)交流PPT,28,學(xué)習(xí)交流PPT,Follow-up 追蹤觀察,29,學(xué)習(xí)交流PPT,CT horseCT檢查馬,Limitations: 局限 Size 大小 Weight 體重,30,學(xué)習(xí)交流PPT,Indications for CT horse馬CT的應(yīng)用,Skull 顱部 Dental problems 牙齒問(wèn)題 Sinus problems 鼻竇問(wèn)題 Etmoid problems 篩骨問(wèn)題 (Brain) 腦部 Extremities 四肢 Fragments? Navicular, a

10、ny body part 碎片？足舟骨炎，其他部位 Complex fractures 復(fù)合骨折,31,學(xué)習(xí)交流PPT,Sinusitis 鼻竇炎,32,學(xué)習(xí)交流PPT,Dental problems 牙齒問(wèn)題,Tooth fracture 牙齒斷裂,Bilateral fracture M1 Food sinus maxillaris,33,學(xué)習(xí)交流PPT,Indications limbs CT horse馬四肢CT的應(yīng)用,Feet/distal limb (till carpus?-tarsus?): 腳/肢遠(yuǎn)端（到腕？-跗部？） fracture (spiral) 螺旋骨折 fragm

11、ents 碎片 OCD 分離性骨軟骨炎 sesamoids 籽骨 navicular bone 足舟骨炎 soft tissues?.軟組織？,34,學(xué)習(xí)交流PPT,Spiral P1 fracture螺旋狀P1骨折,35,學(xué)習(xí)交流PPT,Spiral P1 fracture螺旋狀P1骨折,36,學(xué)習(xí)交流PPT,PET-CT正電子發(fā)射計(jì)算機(jī)斷層顯像儀,37,學(xué)習(xí)交流PPT,PETCT,positron emission tomography 正電子發(fā)射計(jì)算機(jī)斷層顯像技術(shù) -rays Metabolism 新陳代謝,computed tomography CT 計(jì)算機(jī)X線斷層攝影術(shù) X-rays

12、 Anatomy 解剖學(xué),38,學(xué)習(xí)交流PPT,PET-CT,39,學(xué)習(xí)交流PPT,Localisation of Activity 定位,Image fusion 圖象融合 Combined systems 復(fù)合系統(tǒng) CT/MRI/SPECT: data acquired at the same scanning session: no motion! CT/MRI/SPECT: ：掃描過(guò)程中同期獲得數(shù)據(jù)（無(wú)需移動(dòng)） Image fusion with soft ware programs Manual-automatical人工-自動(dòng) CT, TCT: anatomical localization自動(dòng)定位,40,學(xué)習(xí)交流PPT,Localisation with Transmission Computed Tomography: TCT透射式計(jì)算機(jī)斷層的定位,41,學(xué)習(xí)交流PPT,Zrich University,Radiotherapy