Fiber optic radiation dosimetry for medical applications

Harald Bueker; Friedrich Wolfgang Haesing; S. Nicolai; B. Wolters

doi:10.1117/12.17567

1 July 1990 Fiber optic radiation dosimetry for medical applications

Harald Bueker, Friedrich Wolfgang Haesing, S. Nicolai, B. Wolters

Proceedings Volume 1201, Optical Fibers in Medicine V; (1990) https://doi.org/10.1117/12.17567
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

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.

Citation Download Citation

Harald Bueker, Friedrich Wolfgang Haesing, S. Nicolai, and B. Wolters "Fiber optic radiation dosimetry for medical applications", Proc. SPIE 1201, Optical Fibers in Medicine V, (1 July 1990); https://doi.org/10.1117/12.17567

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