Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes . Mild interstitial pulmonary edema is present . Costophrenic angles appear blunted , suggestive of small pleural effusions . Hilar and mediastinal silhouettes are unremarkable . Moderate cardiomegaly appears progressed from prior study . Bibasilar opacities likely represent atelectasis . Degenerative joint changes involving bilateral acromioclavicular joints , right greater than left , are noted with subchondral sclerosis and heterotopic bone formation .
    OUTPUT:
    
Interstitial pulmonary edema , moderate cardiomegaly , and small pleural effusions . Bibasilar opacities likely represent atelectasis .