Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart appears mild - to - moderately enlarged and perhaps somewhat increased in size . The widened appearance to the mid upper mediastinum appears similar , allowing for small differences in rotation . Similar to prior findings , there is volume loss at the right lung base and rightward shift of mediastinal structures , suggesting substantial atelectasis . The lateral view suggests convex opacification of the posterior left costophrenic sulcus , indicating parenchymal opacification , pleural effusion or both , which is not very well seen on the frontal view . This appearance obscures visualization of the posterior right hemithorax on the lateral view , but the frontal view shows no evidence for change . Comparing to a prior lateral view available from ___ , posterior opacities have decreased , however . The left shoulder remains dislocated .
    OUTPUT:
    
Stable appearance of the chest , including cardiomegaly , mediastinal widening , volume loss and atelectasis in the right hemithorax , probably chronic . Possible pleural effusion on the left , potentially loculated , although probably not an acute process .