Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes . Single - lead AICD projects over right ventricle . Heart is moderately enlarged . There is likely a small left pleural effusion . Bilateral predominantly central confluent airspace opacities are noted . There is no pneumothorax . Hilar and mediastinal silhouettes are unchanged . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
Moderate cardiomegaly . Confluent bilateral central airspace opacities most likely represent moderate pulmonary edema , although superimposed infection , particularly in the right lung base , can not be excluded .