Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes . Retrocardiac consolidation is seen on the lateral view projecting over spine . Hilar and mediastinal silhouettes are unchanged . Tortuous descending aorta is noted . Aortic arch calcifications are seen . Moderate cardiomegaly is stable . Mild pulmonary vascular congestion is present . Eventration of the right hemidiaphragm is unchanged .
    OUTPUT:
    
Left lung base consolidation may represent atelectasis or infection in the appropriate clinical setting .