Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle lingular opacity seen on the frontal view , not substantiated on the lateral view , may be due to atelectasis , less likely pneumonia . No focal consolidation is seen . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are stable . DISH is seen along the thoracic spine .
    OUTPUT:
    
Subtle lingular opacity seen on the frontal view , not substantially on the lateral view , may be due to atelectasis , less likely pneumonia . No findings to suggest pneumothorax .