Influence of x-rays on the radiofrequency dielectric properties of bovine kidney tissues
AbstractThe radiofrequency dielectric properties of x-irradiated and non-irradiated bovine kidney tissues have been investigated. The relative permittivity α , the dielectric loss factor α , and the a.c conductivity α of the tissues have been measured in the frequency range 1.0 to 50.0 MHz using a Marconi Q-meter, TF 1245 working in conjunction with an Oscillator TF 1246 at a room temperature of 28 0.5°C.The tissues were irradiated at dose levels of 0 to 6.25mGy, using a 3 phase diagnostic xray machine, Watson PX 304 (Picker International, U.K.). The xray doses were determined by Thermoluminescence Dosimetry (TLD) technique using the LiF TLD discs and Automated SOLARO TLD Reader. The dielectric properties of the irradiated tissues were found to be distinctly different from those of the non-irradiated tissues, showing that the dielectric behaviour of the tissues is highly influenced by x-irradiation.
Keywords: x-rays, radiofrequency, dielectric, permittivity, conductivity
Nigerian Journal of Physics Vol. 17, 2005: 117-122