Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . A vague nodular opacity is seen in the right upper lung adjacent to the EKG electrode sticker . While this may represent a very tiny focus of pneumonia , followup to resolution is advised . Lungs are otherwise clear . No pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Nonspecific vague nodular opacity in the right upper lung is of uncertain etiology . While this may represent a tiny focus of pneumonia , followup radiograph post treatment to ensure resolution .