Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is an unchanged left port catheter with tip in the lower SVC . There is an unchanged right dual - lumen hemodialysis catheter with tips in the mid SVC and proximal right atrium . Low lung volumes . Lungs are otherwise clear . No pleural effusion . No pneumothorax . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Heart size is at the upper limits of normal and unchanged . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Compared to ___ , unchanged left port catheter and right dual - lumen hemodialysis catheter positions .