Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle right middle lobe opacity seen on the lateral view most likely represents atelectasis and possible overlap of vascular structures . No definite focal consolidation is seen . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are stable and unremarkable . .
    OUTPUT:
    
Subtle linear right middle lobe opacity on the lateral view most likely represents atelectasis .