《胸部ct讲座》ppt课件

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1、正常胸部CT胸部CT的优势肺、纵隔、胸廓骨质及胸部软组织在身体中天然对比是较明显的部位，但仅靠胸部平片仍很难显示上述结果与病变之间的密度差异CT能显示胸部正常结构和病灶的大体解剖，定位、定量准确，为定性分析帮助有关胸部CT检查技术的几个问题CT值与窗宽、窗位：肺窗和纵膈窗，双窗技术轴扫及螺旋扫描，层厚和层距（容积效应）吸气不同状态扫描（吸气末）增强扫描，时相高分辨CT（HighResolution,HRCT），层厚1～2mm，显示次级肺小叶结构；显示间质性病变、支扩纵隔窗纵隔分区前纵隔---胸骨后、心

2、脏大血管前，包括胸腺、淋巴结中纵隔---包括气管与主支气管、心脏、主动脉及分支、淋巴结后纵隔---食管前缘后、胸椎前及椎旁沟,包括食管、降主动脉、奇静脉、半奇静脉及淋巴结主要层面和结构主动脉弓及其以上层面：辨认头臂血管主-肺动脉窗层面：窗空虚/潜在，气管分叉，奇V弓右上叶支气管层面：左PA弓、右上PV前干，右上PA，上腔V左上叶支气管层面：右中间段支气管，右PA，右下PA，左上PV，左PA降支其他肺门层面：两侧大小基本对称（肺窗显示更佳），相伴随的支气管和PA分支，由近向远渐小Canyoufindth

3、erightandleftsubclavianarteries?(clickforanswer)Therightsubclavianarteryasitdumpsintothebrachiocephalicartery.(clicktohighlight)Whatarethe3yellowair-filled(black)structureshighlightedhere?(clicktohighlight)ThesearetheRightlungapexTracheaandEsophagus.Thi

4、siscontrast(white)beinginjectedintotheleftsubclavianvein.Canyoufindthefirst3branchesofftheaorticarch?(clickforanswer)BrachiocephalicarteryLeftCommonCarotidarteryLeftSubclavianarteryIncidentallipoma(‘fattumor’)(noticeitisthesamedensityasfatinthechestwall

5、)CanyoufindtheleftbrachiocephalicveinasitdumpsintotheSVC?(clickforanswer)Weareatthelevelofthetopoftheaorticarch(clicktohighlight)Canyoufindtherightpectoralismajorandminor?(clickforanswer)Whatisthestructureinblue?(clicktohighlight)ThisistheSuperiorVenac

6、avaCanyoufindtheazygousarch?(wheretheazygousveincomesacrosstodumpintotheSVC)(clickforanswer)Noticethebifurcationofthetrachea(corina)atthislevel(clicktohighlight)Whatisthestructureinred?(clicktohighlight)Thisistheleftpulmonaryartery.Canyoufindthepulmonar

7、ytrunkandrightpulmonaryartery?(clickforanswer)Wherearetheascending(A)anddescending(D)limbsofthethoracicaorta?(clicktohighlight)ADWeareatthelevelofthetopoftheleftatrium.NoticeThepulmonaryveinsdumpingintoitastheyreturnfromthelungs.(clicktohighlight)Canyou

8、findtheleftmaincoronaryarterycomingofftheaorta?(clickforanswer)YoucanfurtherseeTheleftcoronarybranchintotheCircumflexarteryandtheLADartery(clicktohighlight)Hereisagoodimageoftheaorticsemi-lunarvalveleaflets.Canyoufindthem?(clickf