Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral images of the chest were obtained with the patient in the upright position . There are bilateral pleural effusions , worse on the left . The heart is at the upper limits of normal size . There is retrocardiac opacity that in view of the clinical history is concerning for aspiration pneumonia . There is no pneumothorax . Cardiomediastinal silhouette is unremarkable . Visualized osseous structures are unremarkable .
    OUTPUT:
    
Retrocardiac opacity concerning for aspiration pneumonia given clinical history . Bilateral pleural effusions , left greater than right .