Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right chest wall power injectable Port - A - Cath is present , the tip extending to the lower SVC . Low bilateral lung volumes with persistent elevation of the left hemidiaphragm consistent with postobstructive collapse of left upper lobe . Interval increased aeration of the right lung base however there is a persisting opacity partially silhouetting the right heart border and may reflect atelectasis or consolidation . Unchanged diffuse bilateral pulmonary nodules are again noted . No pneumothorax identified .
    OUTPUT:
    
Increased aeration of the right lung base . There is persisting partial silhouetting of the right heart border which may be secondary to atelectasis or consolidation . No other significant interval change since the prior examination .