Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Some appear to be ___ radiograph there is little change in the low lung volumes and elevation of the right hemidiaphragm . There is a small right pleural effusion and bibasilar atelectasis . The left lung parenchymal opacity appears stable . Mild cardiomegaly persists .
    OUTPUT:
    
Relatively stable appearance of the heart and lungs since ___ .