Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . Mediastinal and hilar contours are unremarkable . Right - sided Port - A - Cath tip terminates in the upper SVC . Subsegmental atelectasis in the left lower lobe is noted . Remainder of the lungs are clear . No pulmonary vascular congestion is seen . There is no pleural effusion or pneumothorax . No acute osseous abnormalities are demonstrated . Clips in the right upper quadrant indicate prior cholecystectomy .
    OUTPUT:
    
Subsegmental atelectasis in the left lower lobe . No radiographic evidence for pneumonia .