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Published data concerning shrinkage rates of low-grade gliomas implanted with 125I seeds have been used to determine the likely influence of such shrinkage on normal tissue doses. It is demonstrated that a tumour volume shrinkage of 50% over 6 months can bring about a 30% increase in the dose delivered to tissues which shrink centripetally towards the implanted volume. The use of radionuclides with a half-life shorter than that of 125I would substantially reduce shrinkage-induced dose increments.

Type

Journal article

Journal

British Journal of Radiology

Publication Date

03/06/1999

Volume

72

Pages

499 - 501