Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is new minimal interstitial edema since prior exam and and stable mild - to - moderate cardiomegaly . These findings suggest the patient is in early heart failure . There is no pleural effusion or pneumothorax . There is a possible right lower lobe medial opacity which could represent an aspiration pneumonia versus atelectasis .
    OUTPUT:
    
Early / mild heart failure . Possible right lower lobe medial opacity which could represent aspiration pneumonia versus atelectasis .