Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are hazy bilateral upper lobe predominant opacities , left greater than right . Based on a supine film there is no definite effusion or pneumothorax . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Hazy in bilateral parenchymal opacities , left greater than right which could represent atelectasis versus aspiration in the setting of overdose .