Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest . No prior . Lungs are hyperinflated . Linear opacity at the left lung base is suggestive of atelectasis . There is a focal approximately 1 - cm opacity projecting over the right upper lung and the anterior second rib . Lungs are otherwise clear . Cardiomediastinal silhouette is within normal limits . Atherosclerotic calcifications noted at the aortic arch . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
No definite acute cardiopulmonary process . Focal opacity projecting over the right lung for which two - view chest x-ray is suggested on nonurgent basis to further evaluate .