Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . Heterogeneous opacities in the left lower lobe are slightly decreased compared to the prior study from ___ , possibly related to atelectasis , although infection could have an identical appearance . Previously noted heterogeneous right lower lung opacities have resolved . The heart and mediastinal contours are not significantly changed . Small bilateral pleural effusions are likely present , although were not seen on CT from ___ . There is no pneumothorax .
    OUTPUT:
    
1 . Slight improvement in left lower lung heterogeneous opacities , possible atelectasis , although infection could be present in the appropriate clinical setting . 2 . Resolution of heterogeneous right lower lung opacities seen on the radiograph from ___ , likely secondary to improved atelectasis . 3 . Probable small bilateral pleural effusions .