Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . Each hilum is enlarged and indistinct suggesting pulmonary vascular congestion . Very small pleural effusions are suspected , particularly on the right . Posterior basilar opacities are new , not specific , although most likely due to atelectasis .
    OUTPUT:
    
1 . Findings suggest mild pulmonary edema . 2 . Suspected small pleural effusions and probable associated posterior atelectasis at the lung bases . Although no nodular opacity is persistently visualized in the left mid lung on this study , this does not negate the possibility of a pulmonary nodule as mentioned in the prior report .