胸部CT正常解剖课件

1、目 录概论纵隔窗的CT解剖肺窗的CT解剖目 录概论 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 前 言有关胸部CT检查技术的几个问题1、CT值与窗宽、窗位：肺窗和纵膈窗，双 窗技术2、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3、平扫和增强扫描：LN，病灶，血管4、高分辨CT（High Resolution ,HRCT） 层厚 12mm，显示次级肺小叶结构； 显示间质性病变、支扩、孤立小病灶 有关胸部CT检查技术的几个问题胸部CT正常解剖课件胸部CT正常解剖课件

2、胸部CT正常解剖课件胸部CT正常解剖课件胸部CT正常解剖课件胸部CT正常解剖课件胸部CT正常解剖课件胸部CT正常解剖课件胸部正常CT解剖纵隔窗胸部正常CT解剖纵隔窗 一、 主要观察内容 1、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） 2、较大范围的肺、胸膜（腔）病变的内部 结构 3、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 一、 主要观察内容 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

3、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，由近向远渐小主要层面和结构主动脉弓及其以上层面：辨认头臂血管胸部CT正常解剖课件胸部CT正常解剖课件胸部CT正常解剖课件胸部CT正常解剖课件Can you find the right and left subclavian arteries? (click for answer)Can you find the right and lefThe right subclavian artery as itdumps into the brachiocephali

4、c artery.(click to highlight)The right subclavian artery asWhat are the 3 yellow air-filled (black) structures highlighted here? (click to highlight)These are the Right lung apexTrachea and Esophagus.What are the 3 yellow air-fillThis is contrast (white) being injected into the left subclavian vein.

5、This is contrast (white) beingCan you find the first 3 branches off the aortic arch? (click for answer)Brachiocephalic arteryLeft Common Carotid arteryLeft Subclavian arteryCan you find the first 3 brancIncidental lipoma (fat tumor) (notice it is the same density as fat in the chest wall) Incidental

6、 lipoma (fat tumor胸部CT正常解剖课件胸部CT正常解剖课件Can you find the left brachiocephalic vein as it dumps into the SVC?(click for answer)Can you find the left brachiocWe are at the level of the top of the aortic arch (click to highlight)We are at the level of the topCan you find the right pectoralis major and mi

7、nor? (click for answer)Can you find the right pectoraWhat is the structure in blue? (click to highlight)This is the SuperiorVena cavaWhat is the structure in blue?胸部CT正常解剖课件胸部CT正常解剖课件Can you find the azygous arch ? (where the azygous vein comes across to dump into the SVC) (click for answer)Can you

8、find the azygous arch 胸部CT正常解剖课件Notice the bifurcation ofthe trachea (corina) at this level (click to highlight)Notice the bifurcation of胸部CT正常解剖课件What is the structure in red? (click to highlight)This is the left pulmonaryartery.What is the structure in red? 胸部CT正常解剖课件胸部CT正常解剖课件胸部CT正常解剖课件Can you fi

9、nd the pulmonary trunk and right pulmonary artery? (click for answer)Can you find the pulmonary truWhere are the ascending (A) and descending (D) limbs of the thoracic aorta? (click to highlight)ADWhere are the ascending (A) an胸部CT正常解剖课件We are at the level of the top of the left atrium. Notice The p

10、ulmonary veins dumping into it as they return from the lungs. (click to highlight)We are at the level of the topCan you find the left main coronary artery coming off the aorta? (click for answer)Can you find the left main corYou can further seeThe left coronary branch into theCircumflex artery and t

11、heLAD artery (click to highlight)You can further see胸部CT正常解剖课件Here is a good image of the aortic semi-lunar valve leaflets. Can you find them? (click for answer)Here is a good image of the aoHere is a good image of the left atrium dumping Into the left ventricle. Can you find it? (click to highlight

12、)Here is a good image of the leYou can clearly see the left ventricular wall and septum with the projecting papillary wall muscles attachingto the mitral valve leaflets. (click to highlight)You can clearly see the left vContrast filling the right ventricleContrast filling the right venCan you find t

13、he pericardial sac here? (click for answer)It is relatively easy tosee because there is a fat layer around the heartand around the pericardium making the soft tissue more visibleCan you find the pericardial s纵膈的分区方法：CT较平片 （侧位）直接显示 前纵膈 - 心脏、大血管前 间隙，胸腺中纵膈 - “三管”结构及其 周围间隙、LN后纵膈 - 脊柱旁（沟）； 脊神经、植物神经 心脏和心包

14、 纵膈的分区方法：CT较平片胸部CT正常解剖课件胸部CT正常解剖课件胸部CT正常解剖课件胸部CT正常解剖课件胸部CT正常解剖课件胸部CT正常解剖课件胸部正常CT解剖肺窗胸部正常CT解剖肺窗一、主要观察内容 1、CT肺门（肺野内带）：第一、二肺门之间的血 管、支气管等 内侧 - 与纵膈内支气管、血管相续（结合纵膈窗） 外侧 - 段支气管开口处，与外周支气管血管束相续 2、支气管血管束（肺野中带） 由肺门发出的、相伴行的支气管和肺A分支； 向肺门/左房回流的、无支气管伴行的肺静脉 3、外周肺（胸膜下区）：段以下的血管、支气管断面 影，呈小条、星、叉、点状 4、阅片要点：抓住重点层面， 观察每一层时，注意上下相邻层面， 完整观察某一结构一、主要观察内容二、主要层面和结构 标志：与肺门相续的支气管、血管 1、右上叶支气管以上层面： 两侧尖段支气管及其外侧的同名动脉 2、右上叶支气管层面：右主支气管，前、后段支气管， 右PA上干；右上PV前干 左上前段支气管 3、右中间段支气管层面：叶间动脉（右下PA 干） 4、左上叶支气管层面：左主、左上叶支气管 5、右中叶、左舌叶，两侧下叶背段气管开口层面： 中叶脊，左下肺A以下层面：基底段支气管和PA分支，两侧基本对称； 近水平走向的双下PV，由近向远渐小几个注