Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is moderately enlarged . There is similar moderate unfolding of the thoracic aorta . The cardiac , mediastinal and hilar contours appear unchanged . There is similar blunting of the left costophrenic angle , probably chronic , although perhaps reflecting scarring or a very small loculated pleural effusion . Patchy posterior basilar opacities suggest minor atelectasis . Interstitial opacification is quite mild but could be seen with slight congestion . Mild degenerative changes are noted throughout the thoracic spine .
    OUTPUT:
    
Slight interstitial abnormality suggesting mild interstitial congestion or fluid overload .