Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are stable in appearance . Lung volumes are slightly increased compared to the prior study with associated improved aeration at the right lung base and apparent slight decrease in right pleural effusion . Persistent patchy and linear atelectasis at the left lung base . No focal new areas of consolidation to suggest the presence of pneumonia . Central venous catheter remains in standard position .
    OUTPUT:
    
Decreased right pleural effusion and improved aeration at right lung base . Residual bibasilar atelectasis , right greater than left .