Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Small left pleural effusion and and possible trace right pleural effusion present . There is mild pulmonary edema . Bibasilar opacities may relate to pleural effusions and vascular congestion , however , underlying aspiration or infection are not excluded , as also noted on the prior study . The cardiac and mediastinal silhouettes are stable , with the cardiac silhouette enlarged in the aorta calcified and tortuous .
    OUTPUT:
    
Small left pleural effusion and possible trace right pleural effusion . Vascular congestion . Bibasilar opacities could relate to pleural effusions and vascular congestion although infection or aspiration is not excluded in the appropriate clinical setting .