Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a cardiomediastinal silhouette which is unchanged and likely normal given the low lung volumes . Bibasilar patchy and linear opacities are increased , and may be secondary to atelectasis , aspiration , or pneumonia . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Increasing patchy and linear bibasilar opacities , which may be due to atelectasis , aspiration , or pneumonia .