31 Uveal Melanoma

Uveal Melanoma

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THE GEC ESTROHANDBOOKOF BRACHYTHERAPY | Part II Clinical Practice Version 1 - 15/04/2020

Plaque Simulator Treatment Plan

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Fig. 19a: Depth dose curve for a 106Ru eye plaque applicator. Active zone marked as dark gray layr.

Fig. 19b: Medium-sized melanoma: GTV (tumour thickness 4 mm, tumour extension 11mm), CTV (target thickness 5 mm, target extension ~13 mm) and a medium-sized 106Ru applicator in place (diameter 15 mm) (active zone marked as black layer) with isodose curves superimposed on a schematic diagram of an eye ball.

Fig. 16: treatment plan dose reporting in patient with tumour thickness of 3.91 mm using CCB Plaque

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Fig. 17: Ruthenium-106 (106Ru) eye plaque applicators (BEBIG) in different size and shape for the treatment of various types of uveal melanoma, including iris melanoma. The applicator types CCB and CCA are the most often used for small and medium-sized melanoma. The use of cut out applicators for tumours near the optic nerve (COB, COC) is more critical as the dose distribution may result in under-dosage in the juxtapapillary area.

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Fig. 18a and 18b: Ruthenium-106 eye plaque applicators (BEBIG)

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