Lower GI 2017

Contact Therapy (Papillon)

- Jean Papillon (Lyon)

- 50 kV maximal energy X-ray beam

- Focal distance of 4 cm

- Applicator diameter of 20-30 mm

- Direct visual control

- Outpatient basis

- Output: 20 Gy/min

- Percentage depth dose: - 100% at surface - 44% at 5 mm - 10% at 20 mm

Gerard et al. Clin Oncol (R Coll Radiol) 2007;19(9):661–73.