Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left mid and lower lung field airspace opacities appear almost entirely resolved with a mild residual left lower lobe opacity . The ET tube ends 4 .5 cm from the carina , the left subclavian line ends in the right atrium , and the enteric tube lies within the stomach . There is no pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
1 . Interval improvement of left mid and lower lung field airspace opacities . 2 . ET tube , left subclavian line , and enteric tube are well positioned .