Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is complete left lower lobe atelectasis . There is diffuse bilateral interstitial thickening , which appears to have worsened in comparison to the prior chest radiograph . Heart size is stable . The mediastinal and hilar contours are stable . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
1 . Complete left lower lobe collapse . 2 . Diffuse bilateral interstitial thickening , which likely represents increased interstitial pulmonary edema , with underlying chronic interstitial lung disease .