Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are provided . There is nonspecific vague opacity at the lower lungs bilaterally which could represent atelectasis and / or pneumonia . The mid - to - upper lungs appear well aerated . Heart and mediastinal contour appears stable . Bony structures are intact .
    OUTPUT:
    
Vague opacity in the lower lungs is concerning for pneumonia and / or atelectasis .