Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . Compared to the prior chest radiograph of ___ there are new right middle , lingular and bilateral lower lobe opacities . No pleural effusion or pneumothorax is identified . The cardiac and mediastinal contours are stable . There is no free air beneath the right hemidiaphragm .
    OUTPUT:
    
Bilateral basilar opacities concerning for atelectasis or pneumonia .