Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate to severe cardiomegaly is unchanged compared to the prior study . The mediastinal and hilar contours are also similar . There is mild pulmonary edema , not significantly changed compared to the prior exam . Small left pleural effusion is likely present . There is no pneumothorax . No acute osseous abnormalities are seen .
    OUTPUT:
    
Mild congestive heart failure with small left pleural effusion .