Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouettes are unchanged in appearance . The bilateral hila are normal . There has been significant improvement of previously seen right lung base opacification . There is minimal residual opacity at the right cardiophrenic angle which may represent crowding of normal vascular structures in the setting of low lung volumes and poor inspiratory effort combined with basilar atelectasis . There is probable left basilar atelectasis as well . There are no other new focal lung consolidations . There is no evidence of pulmonary vascular congestion . There is no pneumothorax .
    OUTPUT:
    
Significant improvement in right base opacity . Residual right cardiophrenic angle opacity likely represents crowding of vascular structures in conjunction with bibasilar atelectasis due to low lung volumes .