Source: Learning Radiology: Recognizing the Basics (Elseviere)
The second study has a deeper inspiration, which makes the heart smaller – you can see 11 ribs.
Not cardiomegaly. The tymus gland is overlapping some of the heart.
Pectus excavatum deformity
Inadequate inspiration – not cardiomegaly
Anterior mediastinal mass (Hodgkin lymphoma – nodular sclerosing variety)
The SPINE sign
The pt is tilted backwards
The pt is rotated to his right
Underpenetrated and the patient has taken an inadequate inspiration
This xray is technically acurate
The radiograph is tilted backwards
The patient is rotated
The patient has taken an inadequate respiration
The radiograph is underpenetrated