Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . No prior . Linear opacities at the lung bases are most suggestive of atelectasis . There is no evidence of consolidation or effusion . Cardiomediastinal silhouette is normal . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
No definite acute cardiopulmonary process .