Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP view of the chest provided . Compared to prior study from ___ , there is minimal improvement in the right lung base opacity . Degree of pulmonary edema is unchanged . There is no large amount of pleural effusion . Heart size is stably enlarged . Right - sided central line terminates in the low SVC .
    OUTPUT:
    
1 . Minimal improvement of right base pneumonia . 2 . Unchanged degree of pulmonary edema .