Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are lower compared with the prior radiograph . The heart size is top normal . Mediastinal and hilar contours are unchanged and unremarkable . The lungs demonstrate very mild increased interstitial pulmonary lung markings , suggesting possible underlying central pulmonary vascular congestion . No pleural effusion , focal consolidation , or pneumothorax .
    OUTPUT:
    
Compared with the radiograph of ___ , mild increased interstitial pulmonary lung markings may suggest underlying central pulmonary vascular congestion / mild interstitial edema .