Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette and hilar contours are normal . On the lateral view , a subtle nodular opacity projects over the upper anterior mediastinum and a of a shadow projects over the upper middle mediastinum and these findings have no frontal view correlate . Lungs are otherwise clear . A small streak of atelectasis is present in the left lung base . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No clear evidence of pneumonia . Subtle nodular opacity in the anterior mediastinum and a ring - shadow projecting over the middle mediastinum on lateral view without a frontal correlate . While these findings may represent overlapping shadows , further evaluation with bilateral oblique radiographs is recommended . Results were relayed over the telephone with ___ , secretary for Dr . ___ , by ___ at 10 :38 on ___ at time of initial review .