Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph is compared to multiple prior radiographs including ___ . Relative to prior examinations , subtle opacities within the bilateral lower lung zones likely overlying soft tissue . Cardiomediastinal and hilar contours are within normal limits . There is no pleural effusion or pneumothorax . Visualized osseous structures are unremarkable .
    OUTPUT:
    
Subtle opacities project over bilateral lower lung zones are due to overlying soft tissue .