Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is a small left - sided pleural effusion , which appears increased , with patchy left basilar opacity which also appears increased . A small suspected right - sided pleural effusion appears unchanged . The pulmonary vasculature shows upper zone redistribution and appears indistinct but findings suggesting parenchymal edema have continued to improve .
    OUTPUT:
    
1 . Small but increased left - sided pleural effusion ; associated opacity is probably compatible with atelectasis although infectious process not excluded . 2 . Findings suggesting mild vascular congestion , but with continued improvement .