Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable view of the chest was obtained . There is subtle left base streaky opacity which may be due to atelectasis . No large pleural effusion is seen . There is no pneumothorax . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Subtle left basilar streaky opacity may be due to atelectasis , however , an early infectious process is difficult to entirely excluded in the appropriate clinical setting . Suggest dedicated PA and lateral views for better evaluation when / if patient able .