Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to prior study , there is persistent moderate - to - large right - sided effusion with associated right base atelectasis . This in conjunction with low lung volumes makes determination of the cardiac silhouette difficult . Atherosclerotic mural calcifications are again noted within the aortic arch . There has been improvement in right greater than left asymmetric pulmonary edema with mild residual right - sided edema . A focal increased area of consolidation in the right upper lobe may also be due to asymmetric edema , however , remains suspicious for pneumonia . There is no pneumothorax .
    OUTPUT:
    
Persistent right pleural effusion . Improved asymmetric edema with residual right - sided edema . Right upper lobe consolidation may be due to edema , but is suspicious for pneumonia and continued surveillance is recommended .