Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided Port - A - Cath tip terminates in the SVC . The heart size is normal . Mediastinal and hilar contours are unchanged . There has been interval improvement in aeration of the left lung base . A small left pleural effusion is likely present . Persistent partially loculated small to moderate right pleural effusion is unchanged with adjacent right basilar opacity likely reflecting compressive atelectasis . No pulmonary edema or pneumothorax is identified .
    OUTPUT:
    
Interval improvement in aeration of the left lung base . Bilateral pleural effusions , right greater than left , relatively unchanged . Right basilar opacity likely reflects compressive atelectasis though infection can not be completely excluded .