Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates interval worsening in the heterogeneous bibasilar opacities , left greater than right , with small bilateral pleural effusions . The cardiomediastinal and hilar contours are unchanged . There is no pneumothorax .
    OUTPUT:
    
Interval worsening in the heterogeneous bibasilar opacities , left greater than right , with small bilateral pleural effusions . Pulmonary edema , aspiration and / or superimposed infection should be considered in the appropriate clinical setting .