Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A tracheostomy tube sits at the level of the clavicles . A right IJ central line terminates in the SVC . Evaluation of the lungs is somewhat limited by low lung volumes and motion artifact . However , bilateral airspace opacities have decreased since the study of 5 days ago . Left lung nodules are again noted . Persistent opacification of the retrocardiac region is likely due to atelectasis . There are likely small layering bilateral pleural effusions . The cardiomediastinal silhouette is magnified by the projection . There is no pneumothorax .
    OUTPUT:
    
Improving airspace opacities which may be due it resolving edema versus aspiration . Right IJ central line remains in satisfactory position .