Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , mild cardiomegaly , an otherwise normal mediastinum are stable , and small layering pleural effusions are stable , but mild pulmonary edema is worse . Bilateral lower lung opacification has increased . Whether this is dependent edema and atelectasis alone , or hides pneumonia is radiographically indeterminate . There is no pneumothorax .
    OUTPUT:
    
Mild , worsened congestive heart failure . Pneumonia not excluded .