Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged , although there is a vague right perihilar opacity which is concerning for an early infectious process . Markedly asymmetric pulmonary edema seems less likely . The chest is hyperinflated . There is no definite pleural effusion or pneumothorax . Mild degenerative changes are similar along the thoracic spine .
    OUTPUT:
    
Vague perihilar opacity for which developing pneumonia versus aspiration is a consideration . Short - term followup radiographs are suggested to reassess in addition to correlation with clinical presentation .