Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded consistent with underlying obstructive lung disease . There is predominantly streaky linear opacity laterally in the left upper lung likely in the posterior segment of the left upper lobe when corroborated with the lateral view . Ill - defined opacities are seen in the right suprahilar region as well . No superimposed edema is noted . The mediastinum is unremarkable . The cardiac silhouette is within normal limits for size . No effusion or pneumothorax is noted . The visualized osseous structures are unremarkable .
    OUTPUT:
    
Ill - defined densities laterally in both upper lungs . No comparisons to assess for chronicity of these findings . If acute they could represent early multifocal pneumonia . Conceivably however these could represent scarring which can be confirmed with prior radiographs .