Fricke spaces

Genetics: Fricke and Demerec

1Wright, S., Genetics, 16, 97-159 (1931). 2 Wright, S., Jour. Genetics, 30, 243-256 (1934). 3Fisher, R. A., Proc. Roy. Soc. Edinburgh, 42, 321-341 (1922). 4Wright, S., Amer. Nat., 63, 556-561 (1929). 5 Fisher, R. A., The Genetical Theory of Natural Selection, Oxford, Clarendon Press, 272 pp. (1930). 6 Fisher, R. A., Proc. Roy. Soc. Edinburgh, 50, 205-220 (1930). 7 Haldane, J. B. S., The Causes ...

Review of Fricke gel dosimeters

The innovation of adding a gel matrix to the traditional Fricke dosimeter to stabilize geometric information established the field of gel dosimetry for radiation therapy. A discussion of Fricke gels provides an overview of the issues that determine the dose response of all gel dosimeters in general. In this paper we review some of the features of Fricke systems to illustrate these issues and, i...

1 1 Ja n 20 09 Trace coordinates on Fricke spaces of some simple hyperbolic surfaces

Dosimetry in HDR brachytherapy with Fricke-gel layers and Fricke-gel catheters

Fricke-gel layer dosimeters (FGLD) and Fricke gel dosimetric catheters (FGDC) have been designed and tested with the aim of enquiring their suitability for HDR Ir brachytherapy source control and for in-vivo dose verification during treatment. Anisotropy function measurements have been carried out with FGLDs in which a thin plastic tube has been placed in for the Ir source insertion. FGDCs are ...

Fricke dosimetry for synchrotron stereotactic radiotherapy

In synchrotron stereotactic radiotherapy (SSR) the tumor is loaded with a high Z element, and exposed to monochromatic x-rays from a synchrotron source, in stereotactic conditions. The SSR treatment efficiency is related to the heavy element concentration achievable in the tumor, to the radiation energy, and the irradiation geometry [1,2]. The experimental dose verification of SSR in three dime...