Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . The lungs are grossly clear noting linear left basilar opacity likely due to atelectasis . Cardiomediastinal silhouette is stable . Dense atherosclerotic calcifications seen in the aorta are again noted . Sclerosis projecting over the right humeral head which may represent avascular necrosis . No free intraperitoneal air identified .
    OUTPUT:
    
No acute cardiopulmonary process . Sclerosis projecting over the right humeral head which may represent avascular necrosis .