For smaller gap widths expected on the HDMLC, errors in RFO and DLG may have a profound effect on dosimetric error. Regardless of SMLC or DMLC treatment delivery mode, assurance that leaves moves precisely from predetermined positions and maintain a gap width are vital to both accurate IMRT and VMAT delivery.
This paper serves to address the rounded leaf effect for the HDMLC and its effect on dosimetric accuracy for all delivery techniques available on the TrueBeam STx.