Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is patchy opacification of the right base , which may reflect atelectasis , but is concerning for pneumonia . Linear opacities within the left mid to lower lung likely reflect atelectasis . No additional focal consolidations . No pulmonary edema . Stable appearance of the cardiomediastinal silhouette . No large pleural effusion . No pneumothorax .
    OUTPUT:
    
1 . No evidence of pneumothorax . 2 . Patchy opacities at the right base , which may reflect atelectasis , however an underlying pneumonia can not be excluded .