Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size appears mildly enlarged , but decreased from the prior study . Mediastinal and hilar contours are within normal limits . Pulmonary vasculature is not engorged . Minimal patchy opacities are noted in the lung bases , improved compared the prior study , colon likely reflective of atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . Osseous structures are diffusely demineralized .
    OUTPUT:
    
Minimal patchy opacities in the lung bases , improved compared to the prior study , and likely reflective of atelectasis .