Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes remain low . Heart size is mildly enlarged but similar compared to the previous study . The mediastinal and hilar contours are unchanged , and the pulmonary vasculature is not engorged . Patchy atelectasis is seen in the lung bases without focal consolidation . No pleural effusion or pneumothorax is present . Extensive osseous metastatic disease is re - demonstrated , better visualized on the previous CT chest .
    OUTPUT:
    
Patchy bibasilar atelectasis in the setting of low lung volumes . No focal consolidation to suggest pneumonia .