Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . No prior . The lungs are clear of focal consolidation . Linear opacity at left lung base suggestive of atelectasis . Nodular opacity projects over the anterior left first rib , potentially within it or in the left lung apex . Lungs are otherwise clear . The cardiomediastinal silhouette is within normal limits . Osseous and soft tissue structures are grossly unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process or cardiomegaly . Nodular opacity projecting over the left lung apex , potentially within the rib or lung . Dedicated two - view chest with apical lordotic view suggested when patient is amenable for further characterization .