Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tracheostomy tube is in unchanged position . Right PICC terminates at cavoatrial junction . Lung volume remains low . Left lung base opacity is slightly increased . Multifocal small peribronchial opacities are similar to before . There is possible small left pleural effusion . Cardiomediastinal silhouette is normal size . Mild pulmonary edema is stable .
    OUTPUT:
    
Increasing left lung base opacity may be pneumonia . Stable multi focal peribronchial opacities may also reflect multifocal pneumonia . Stable mild pulmonary edema .