Electron contamination modeling and reduction in a 1 T open bore inline MRI-linac system
A potential side effect of inline MRI-linac systems is electron contamination focusing causing a high skin dose. In this work, the authors reexamine this prediction for an open bore 1 T MRI system being constructed for the Australian MRI-Linac Program. The efficiency of an electron contamination deflector (ECD) in purging electron contamination from the linac head is modeled, as well as the impact of a helium gas region between the deflector and phantom surface for lowering the amount of air-generated contamination.
Oborn, B., Kolling, S., Metcalfe, P. E., Crozier, S., Litzenberg, D. W. & Keall, P. (2014). Electron contamination modeling and reduction in a 1 T open bore inline MRI-linac system. Medical Physics, 41 (5), 051708-1-051708-15.