Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiograph demonstrates low lung volumes with chronic interstitial fibrosis and bibasilar atelectasis . Cephalization with a increased interstitial markings in the upper lobes is most consistent with mild vascular congestion . A focal opacity within the left lingula is more prominent on today 's examination . No pleural effusion . Heart size , mediastinal contour , and hila are unremarkable . No pneumothorax .
    OUTPUT:
    
1 . Increased opacity in the lingula is most consistent with atelectasis however differential pneumonia in the appropriate clinical setting . 2 . Mild vascular congestion . 3 . Evidence of chronic interstitial fibrosis and bibasilar atelectasis .