Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to recent exam , the degree of edema has not significantly changed . Right midlung opacity on prior has decreased in the interval . There are small bilateral pleural effusions . Cardiac enlargement is similar to prior . Atherosclerotic calcifications again noted at the arch . Degenerative changes seen at the left shoulder .
    OUTPUT:
    
Small bilateral pleural effusions and mild edema . Confluent right midlung opacity seen on prior has decreased in the interval , potentially superimposed infection .