Measurement of dose rate from 106Ru/106Rh ophthalmic applicators by means of alanine-polymer foils
✍ Scribed by P. Hjortenberg; J.W. Hansen; M. Wille
- Book ID
- 103920451
- Publisher
- Elsevier Science
- Year
- 1989
- Weight
- 289 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0883-2889
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✦ Synopsis
Ophthalmic applicators are used in radiotherapy for the treatment of malignant choroidal melanomas. The applicators are positioned on the eye at the base of the tumor for a period of a few days up to 2 weeks. They are commercially available in the form of caps of a spherical radius of 12 or 13 mm. Two or three fixing lugs are used for suturing the applicator to the eye. The applicators are made of silver. The active layer is covered with 0.1 mm silver in the concave direction, and 0.9 mm silver in the convex direction. The fl-radiation emitted from the concave side may be used for treatment, to a depth up to 5 mm. Measurements of dose rate by means of ESR/alanine dosimetry and TLD are described. It is concluded that ESR/dosimetry and TLD are well suited for this application.