Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is subtle patchy right mid lung opacity which could be due to pneumonia in the appropriate clinical setting versus atelectasis . No pleural effusion is seen . The cardiac and mediastinal silhouettes are unremarkable . No overt pulmonary edema is seen .
    OUTPUT:
    
Patchy right mid lung opacity could be due to pneumonia in the appropriate clinical setting versus atelectasis .