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Proceedings Paper

Fiber optic radiation dosimetry for medical applications
Author(s): Harald Bueker; Friedrich Wolfgang Haesing; S. Nicolai; B. Wolters
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Paper Abstract

The dosimetry with glass fibers perrilits for the first time the dose to be determined in the immediate vicinity of the tumour. A fiberoptic dosimeter can either be introduced during an operation or else inserted via a cannula into the vicinity of the tumour to be irradiated. The dosimeter should remain in the patient's body until radiation therapy has been completed. The basic principle of the fiberoptic dosimeter is to measure the additional attenuation generated in the fiber by irradiation. A lead-glass fiber with 60 weight - % PbO was used as a particular radiationsensitive fiber. This is a step-index fiber with a core diameter of 100 pm and a total diameter of 110 pm. Measurements of the spectral distribution of the induced loss result in a detection sensitivity of smaller than 0.1 Gy for the lead-glass fiber at a local resolution of about 2 cm. This satisfies the demands of radiotherapy.

Paper Details

Date Published: 1 July 1990
PDF: 11 pages
Proc. SPIE 1201, Optical Fibers in Medicine V, (1 July 1990); doi: 10.1117/12.17567
Show Author Affiliations
Harald Bueker, Nuclear Research Ctr. Juelich (Germany)
Friedrich Wolfgang Haesing, Nuclear Research Ctr. Juelich (Germany)
S. Nicolai, Nuclear Research Ctr. Juelich (Germany)
B. Wolters, Nuclear Research Ctr. Juelich (Germany)

Published in SPIE Proceedings Vol. 1201:
Optical Fibers in Medicine V
Abraham Katzir, Editor(s)

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