Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable view of the chest was obtained . The questionable finding of pneumothorax on the prior study is no longer appreciated and was likely due to artifact / possible skin fold . No definite pneumothorax is seen on the current study . Bilateral mid to lower lung opacities are again seen without significant interval change . There are possible trace bilateral pleural effusions . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
No definite evidence of pneumothorax on the current study ; finding on the prior study was likely artifactual . Persistent bilateral pulmonary opacities and possible small bilateral pleural effusions .