Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are obtained . There is very subtle patchy opacity at the lateral left upper lung which may relate to atelectasis , although an early consolidation can not be excluded in the appropriate clinical setting . The remainder of the lungs is clear . No pleural effusion or pneumothorax . The mediastinal silhouette is unremarkable .
    OUTPUT:
    
Subtle patchy opacity lateral left upper lung most likely relates to atelectasis and possible vessels ; however , early consolidation can not be excluded in the appropriate clinical setting .