Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single supine portable view of the chest . Extremely low lung volumes are seen . Exam is also limited secondary to positioning . There are bibasilar opacities more conspicuous on the left . Left hemidiaphragm is not delineated . Superiorly the lungs are clear of confluent consolidation . Cardiomediastinal silhouette difficult to assess given positioning . Atherosclerotic calcifications are noted in the thoracic aorta . Severe degenerative changes seen at the shoulders bilaterally .
    OUTPUT:
    
Limited portable chest x-ray . Bibasilar left greater than right opacities potentially atelectasis versus consolidation or potentially effusions .