Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest is compared to previous exam from ___ . When compared to prior , there has been partial resolution of the bilateral parenchymal opacities seen on prior . There is however persistent left basilar opacity . Both could be due to atelectasis , aspiration or infection is also possible . Blunting of the right lateral costophrenic angle is suggestive of an effusion . Cardiac silhouette is difficult to assess given differences in positioning and technique , but likely has not changed .
    OUTPUT:
    
Interval improvement in the appearance of the lungs with some persistent left basilar opacity , potentially atelectasis versus aspiration / infection and small probable right pleural effusion .