Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left pleural effusion has decreased , previously occupying more than half of the left hemi thorax and now occupying approximately ___ of the left hemi thorax . A small right effusion is noted on the lateral projection . The right lung is clear . The cardiomediastinal silhouette is unchanged with intact median sternotomy wires .
    OUTPUT:
    
Interval decrease in size of left pleural effusion .