Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly is stable . The aorta is tortuous . There are low lung volumes . Pacer leads are in standard position . Right PICC tip is in the upper SVC . There is no pneumothorax . Opacities in the right base are likely atelectasis . If any there is a small right effusion .
    OUTPUT:
    
Low lung volumes . Right lower lobe opacities are likely atelectasis .