Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . When compared to prior , there has been interval improvement in the pulmonary edema . Blunting of the left costophrenic angle suggests small residual left - sided effusion . The cardiac silhouette is enlarged but similar in configuration . Atherosclerotic calcifications noted at the aortic arch .
    OUTPUT:
    
Improved pulmonary edema since ___ with persistent left - sided effusion .