Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a new , ill - defined opacity in the right upper lung field . Differential includes small focus of pneumonia or less likely neoplasm . The ill - defined margins favor an infectious process , and it would be reasonable to treat for pneumonia with followup radiographs in 3 weeks to document resolution . If the opacity is still seen on followup radiographs , chest CT should be performed at that time . No other suspicious lesion is seen . There is no pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
New ill - defined opacity in the right upper lung field , recommend empiric pneumonia treatment with followup radiographs in 3 weeks and chest CT if no resolution .