Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A small to moderate right pleural effusion is unchanged . The left lung remains clear . Previous mild pulmonary edema has resolved . There is no pneumothorax . Mild cardiomegaly has improved . Regional bones and soft tissues are unremarkable .
    OUTPUT:
    
Clear lungs . Stable small to moderate right pleural effusion .