Oesophagus
Thymus
Topography
Sections
Thoracic viscera, radiography
T ra c h e a
Corpus costae I; III; IV
A. p u im o n a lis d e xtra.
A a lo b ä re s in ferio res
— Ventriculus cordis 
sinister
— Diaphragma 
Apex cordis
Recessus costo- 
diaphragmaticus
Fig. 927 
Thoracic cage, Cavea thoracis, and thoracic viscera; 
PA-radiograph of a 27-year-old male (thorax radiograph].
1
= “Aortic knob”
Fig. 928 
Outline of the heart shadow in the radiograph;
Dt = Transverse diameter, 
ab + cd = 13-14 cm
L = 
Longitudinal axis of the heart (from the superior 
border of the right atrial contour to the apex of the 
heart] = 15-16 cm
M = Median plane of the body
M
 
    
