Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . No prior . Linear opacity identified in the right upper lung laterally suggestive of atelectasis versus scarring . Elsewhere the lungs are clear within the limitation of a significantly rotated exam . Cardiomediastinal silhouette is grossly unremarkable . Osseous and soft tissue structures appear normal . There is suggestion of prior healed lateral left rib fractures .
    OUTPUT:
    
Findings suggestive of right upper lung atelectasis versus scarring . No definite acute cardiopulmonary process given limitation of this significantly rotated examination .