The lateral CXR
is less frequently requested and more difficult to interpret. Nevertheless it contains much information on the thoracic cage, pleura
, lungs, pericardium
, heart, mediastinum and upper abdomen.
The four indications are to localize a lesion seen on frontal CXR, to clarify lobar collapse/consolidation, to explore a retrosternal or retrocardiac shadow or to confirm the presence of encysted fluid in the oblique fissure (pseudotumour).
Don't worry as lateral chest x-ray is being done to explore more and clear the doubts which might be arising in front x- ray.