Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is moderately enlarged . There is pulmonary vascular redistribution with ill - defined vasculature and patchy areas of alveolar infiltrate bilaterally . There is a small left pleural effusion . There is no definite right effusion . There is volume loss at both bases .
    OUTPUT:
    
CHF . Underlying infectious infiltrate ca n't be excluded .