Sci‐PM Sat ‐ 08: Feasibility of gated helical tomotherapy using the real‐time position management (RPM) system

Abstract

We propose a new method of gating helical tomotherapy (HT) delivery for lung lesions that does not require breath holding. Without interrupting the gantry rotation and couch translation, the complete closure of the bMLC leaves would be triggered by the Real Time Position Management (RPM) system (Varian Oncology Systems, Palo Alto, CA), whenever the associated chest (and implied tumour) position moves outside the gating window. Once the initial radiation delivery is complete, additional iterations of the helical treatment are repeated until >95 % of the planned beam projections are delivered. Each iteration commences at a different phase of the respiratory cycle to “fill in” the previously un..