Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . The pulmonary vasculature is normal . New patchy opacity is seen within the left lung base as well as a more focal opacity overlying the right mid lung field . No pleural effusion or pneumothorax is present . No acute osseous abnormalities seen .
    OUTPUT:
    
Patchy opacity in the left lung base is concerning for pneumonia . More focal opacity within the right mid lung field may reflect a second focus of infection . Follow up radiographs after treatment are recommended to ensure resolution of these findings .