Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . Patchy opacities are seen involving the left lung base , left perihilar region , and right mid lung field . No pleural effusion or pneumothorax is seen . The pulmonary vascularity is normal . No acute osseous abnormalities are demonstrated . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
Multifocal patchy opacities concerning for pneumonia . Follow up radiographs after treatment are recommended to ensure resolution of this finding .