Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette is within normal limits . Bilateral PICCs terminates in the right atrium . Heterogeneous bilateral nodular opacities have substantially improved . There is no new consolidation or pleural effusion . No pneumothorax .
    OUTPUT:
    
1 . Bilateral PICC lines terminate in the right atrium and should be pulled back by approximately 2 cm for more optimal placement . 2 . Interval improvement of nodular bilateral parenchyma opacities .