Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tracheostomy tube again noted . NG tube again noted , extending beneath the diaphragm to overlie the stomach . Right subclavian PICC line tip lies near the SVC / RA junction , similar to prior . Cardiomediastinal silhouette is unchanged . Equivocal minimal upper zone redistribution , without other evidence of CHF . Patchy opacity at the left lung base again noted . However , there has been interval improvement , with the left hemidiaphragm now visible . Small left pleural effusion difficult to exclude , but this appears improved . Equivocal minimal right pleural effusion . The right lung remains grossly clear .
    OUTPUT:
    
Interval improvement in retrocardiac opacity with some residual patchy opacity and probable small left and right pleural effusions . No overt CHF .