Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increased opacity at the lung bases bilaterally with a linear opacity in the right mid lung are seen . On the lateral view , there is increased density over the spine . There may be a tiny right pleural effusion . No pneumothorax . Cardiac and mediastinal silhouettes and hilar contours are stable .
    OUTPUT:
    
Right lower lobe and possibly left lower lobe pneumonia . Right mid lung atelectasis .