Table 2.

Workflow of mould production

Step	Procedure
1	Mould target region of the patient with liquid silicone
2	Plaster cast of the silicone negative to obtain a positive model (Figure 1A)
3	Form a layer of plastic mould material to the positive plaster cast (Figure 1B)
4	Glue flexible 6F BT applicators (ProGuide, Elekta, Sweden) on the mould with ultraviolet light curable acrylic resin, resulting in an embedment of the applicators into the final construct (Figure 1C)
5	Imaging and treatment planning: attach mould, CT imaging, check fit of the mould, prepare the treatment plan
6	Only required, if initial treatment plan is not satisfactorily covering the PTV: glue additional applicators on the mould (done with two strongly bent peripheral applicators of Figure 1D). Repeat CT imaging and planning process (step 5)