Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The moderate right pleural effusion is not appreciably changed since ___ and obscures the right hemidiaphragm and right heart border . There is adjacent chronic consolidation of the right lung base , likely atelectasis . There is no definite sign of superimposed pneumonia . The right apical pleural density is unchanged . The left lung appears clear . The cardiomediastinal silhouette is not appreciably changed however the right heart border is obscured incompletely evaluated . There is no vascular engorgement . There is no pneumothorax present .
    OUTPUT:
    
Unchanged moderate right pleural effusion without definite sign of superimposed pneumonia .