胸部正常CT断层解剖图片.pptxVIP

胸部正常CT解剖

目录概论纵隔窗的CT解剖肺窗的CT解剖

前言肺、纵隔内部组织结构之间、正常结构与病变之间的密度差异CT满意显示胸部正常结构和病灶的大体解剖，定位、定量准确，为定性分析提供形态学基础

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，双窗技术层厚和层距：吸气末扫描，薄层/重叠扫描；减小部分容积效应、肺血坠积现象平扫和增强扫描：LN，病灶，血管高分辨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、孤立小病灶

胸部正常CT解剖纵隔窗

主要观察内容纵膈：有无纵膈肿块、多余结构LN有无肿大或/及增多“三管”结构形态（气道结合肺窗）较大范围的肺、胸膜（腔）病变的内部结构阅片顺序：辨认每一层纵膈内的“三管”结构自上而下、由近段向远段完整观察某一结构

主要层面和结构添加标题主动脉弓及其以上层面：辨认头臂血管添加标题主-肺动脉窗层面：窗空虚/潜在，气管分叉，奇V弓添加标题右上叶支气管层面：左PA弓、右上PV前干，右上PA，上腔V添加标题左上叶支气管层面：右中间段支气管，右PA，右下PA，左上PV，左PA降支添加标题其他肺门层面：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

Canyoufindtherightandleftsubclavianarteries?(clickforanswer)

Therightsubclavianarteryasitdumpsintothebrachiocephalicartery.(clicktohighlight)

Whatarethe3yellowair-filled(black)structureshighlightedhere?(clicktohighlight)ThesearetheRightlungapexTracheaandEsophagus.

Thisiscontrast(white)beinginjectedintotheleftsubclavianvein.

Canyoufindthefirst3branchesofftheaorticarch?(clickforanswer)BrachiocephalicarteryLeftCommonCarotidarteryLeftSubclavianartery

Incidentallipoma(‘fattumor’)(noticeitisthesamedensityasfatinthechestwall)

CanyoufindtheleftbrachiocephalicveinasitdumpsintotheSVC?

(clickforanswer)

Weareatthelevelofthetopoftheaorticarch(clicktohighlight)

Canyoufindtherightpectoralismajorandminor?(clickforanswer)

Whatisthestructureinblue?(clicktohighlight)ThisistheSuperiorVenacava

Canyoufindtheazygousarch?(wheretheazygousveincomesacrosstodumpintotheSVC)(clickforanswer)

Noticethebifurcationofthetrachea(corina)atthislevel(clicktohighlight)

Whatisthestructureinred?(clicktohighlight)Thisistheleftpulmonaryartery.

Canyoufindthepulmonarytrunkandrightpulmonaryartery?(clickforanswer)

Wherearetheascending(A)anddescending(D)limbsofthethoracicaorta?(clicktohighlight)AD

Weareatthelevelofthetopoftheleftatrium.NoticeTh