Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low and cause crowding of the pulmonary vascular markings . Bibasilar atelectasis is noted , greatest in the left base . Cardiomediastinal silhouette is normal . The lungs are otherwise without focal consolidation , effusion , or pneumothorax . No free air is noted under the hemidiaphragms . No acute fractures are identified . Cholecystectomy clips are noted in the right upper quadrant .
    OUTPUT:
    
Bibasilar opacities , likely atelectasis , however , pneumonia must be excluded in the proper clinical setting . No acute cardiopulmonary process otherwise .