Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Small , subtle opacity , measuring approximately 6 mm projecting over the posterior right 9th rib may be artifactual or summation of shadows / vascular structures , but small ground glass opacity from underlying infection can not be excluded . No pleural effusion , or evidence of pneumothorax is seen . Cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Small , subtle opacity , measuring approximately 6 mm projecting over the posterior right 9th rib may be artifactual or summation of shadows / vascular structures , but small ground glass opacity from underlying infection can not be entirely excluded . Recommend f / u chest radiograph to resolution to exclude an underlying nodule . If clinical concern for pulmonary mass persists , CT is more sensitive for pulmonary nodules . Findings / recommendation submitted to the ED QA nurses on ___ at 8 :25 PM .