Can you find the azygous arch ? (where the azygous vein comes across to dump into the SVC) (click for answer)
Notice the bifurcation of the trachea (corina) at this level (click to highlight)
Can you find the right pectoralis major and minor? (click for answer)
What is the structure in blue? (click to highlight)
This is the Superior Vena cava
What are the 3 yellow air-filled (black) structures These are the
highlighted here? (click to highlight)
Right lung apex
Trachea and
Esophagus.
This is contrast (white) being injected into the left subclavian vein.
Can you find the left main coronary artery coming off the aorta? (click for answer)
You can further see The left coronary branch into the Circumflex artery and the LAD artery (click to highlight)
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
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
What is the structure in red? (click to highlight)
This is the left pulmonary artery.
Can you find the pulmonary trunk and right pulmonary artery? (click for answer)
Can you find the left brachiocephalic vein as it dumps into the SVC? (click for answer)
We are at the level of the top of the aortic arch (click to highlight)
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
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
Where are the ascending (A) and descending (D) limbs of the thoracic aorta? (click to highlight)
A D
We are at the level of the top of the left atrium. Notice The pulmonary veins dumping into it as they return from the lungs. (click to highlight)
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
Can you find the right and left subclavian arteries? (click for answer)
The right subclavian artery as it dumps into the brachiocephalic artery. (click to highlight)
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 left atrium dumping Into the left ventricle. Can you find it? (click to highlight)
Can you find the first 3 branches off the aortic arch? (click for answer)
Brachiocephalic artery Left Common Carotid artery Left Subclavian ara (‘fat tumor’) (notice it is the same density as fat in the chest wall)
3、平扫和增强扫描：LN，病灶，血管 4、高分辨CT（High Resolution ,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
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）