Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is an ET tube , tip approximately 4 .3 cm above the carina , and an NG tube , tip extending beneath diaphragm off film . The cardiomediastinal silhouette is unchanged . Mild upper zone redistribution is similar to the prior study . Patchy retrocardiac opacity is more pronounced , with new obscuration of the medial left hemidiaphragm . Otherwise , no focal infiltrate . No gross effusion .
    OUTPUT:
    
1 . New obscuration of the medial left hemidiaphragm and increased retrocardiac opacity , consistent with left lower lobe collapse and / or consolidation . 2 . Mild upper zone redistribution , similar to prior .