Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is enlarged , similar in appearance to prior studies . Mediastinal and hilar contours are unremarkable . The interstitium is prominent , particularly within the lung bases , likely a combination of low lung volumes and pulmonary edema . No focal opacification concerning for pneumonia .
    OUTPUT:
    
Cardiomegaly with increased prominence of the interstitium likely reflects congestive heart failure .