Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest are compared to previous exam from ___ . Lower lung volumes seen on the current exam . There are regions of bibasilar atelectasis . Superiorly , the lungs are clear . There is no evidence of pulmonary vascular congestion . Cardiomediastinal silhouette is stable . Left chest wall port seen with catheter tip at the lower SVC . Osseous and soft tissue structures are unchanged . Surgical clips in the upper abdomen suggest prior cholecystectomy .
    OUTPUT:
    
No acute cardiopulmonary process .