Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette and hilar contours are stable . Lung volumes are persistently low with mild improvement of pulmonary edema and persistent small left effusion with bibasilar atelectasis . There is no pneumothorax .
    OUTPUT:
    
Mild improvement of edema but with persistent small left effusion and bibasilar atelectasis .