Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiographs demonstrate pulmonary vascular congestion and mild interstitial edema . Left basilar segmental atelectasis is worse than on most recent radiograph . The heart size appears relatively stable given differences in technique from prior radiographs . Tortuosity of the aortic arch is somewhat exaggerated due to leftward rotation . There is no large pleural effusion or pneumothorax . Compression fracture in the upper thoracic vertebra is unchanged .
    OUTPUT:
    
Mild interstitial edema .