Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Port - A - Cath resides over the right chest wall with catheter tip in the region of the lower SVC . A tracheostomy tube projects over the superior mediastinum . Bibasal opacities are significantly improved compared with prior exam though there is mild persistent opacity , right greater than left . No pneumothorax is seen . No large effusion . Cardiomediastinal silhouette appears normal . Bony structures are intact .
    OUTPUT:
    
Significant improvement in aeration with mild residual bibasilar opacity compared with prior .