Quality assurance, Safety, Audit and standards, CT, Computer applications, Radioprotection / Radiation dose, Radiotherapy techniques
I. Williams1, J. Lye1, A. Alves1, M. Shaw1, J. Supple1, F. Gibbons2, S. Keehan1; 1VIC/AU, 2QLD/AU
Methods and materials
The Level II uses the TG-119  C-shape” target,
and add additional diagnostic tests; the Van Esch “Chair” test  and the nested “four L” test from Elekta commissioning tests.
The plans are measured with the PTW Octavius 1500 array in a solid water and lung slab phantom which are shown in Figure 1 a) and b) respectively.
The LIII audit also uses the “C-shape” target volume from AAPM TG119 (with and without lung,
Figure 2 b) and a) respectively) and the “Complex case” with two adjacent target structures and a fully encapsulated low dose region,
Figure 2 c).
The dose is measured in a custom anthropomorphic phantom (CIRS) with removable lung inserts using 7 CC13 chambers and an eight channel TomoTherapy® TomoElectrometer.