Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Assessment is somewhat limited by patient positioning . Lung volumes are low . Cardiac silhouette size is borderline enlarged but unchanged . Crowding of bronchovascular structures is present without overt pulmonary edema . Patchy atelectasis is seen in the lung bases without focal consolidation . No pleural effusion or pneumothorax is identified on this supine exam . No acute osseous abnormality is detected .
    OUTPUT:
    
Low lung volumes with probable bibasilar atelectasis .