fix syntax for nodeLoad*.vts generation
fix syntax for nodeLoad*.vts generation

RSNA-QIBA-US-SWS/QIBA-DigitalPhantoms,Guokr1991/QIBA-DigitalPhantoms,RSNA-QIBA-US-SWS/QIBA-DigitalPhantoms,Guokr1991/QIBA-DigitalPhantoms,Guokr1991/QIBA-DigitalPhantoms,RSNA-QIBA-US-SWS/QIBA-DigitalPhantoms