Retrospective dosimetry using synthesized nano-structure hydroxyapatite.
Micro and nano-structure hydroxyapatite samples were synthesized via several different methods. The samples were characterised utilising the Fourier transmission infra-red, scanning electron microscope and X-ray diffraction methods, to find out the structure most similar to human tooth enamel, and the best method was found. The electron paramagnetic resonance (EPR) signals of the gamma-irradiated samples were measured using an EPR spectrometer system. A calibration curve was established by irradiation of the samples at four doses of 50-500 mGy. The parameters of the calibration curve, slope and intercept with dose axis are determined by linear regression analysis. This calibration curve can be used for human tooth enamel for retrospective dosimetry purposes.
Agricultural, Medical and Industrial Research School, Nuclear Science and Technology Research Institute, PO Box 31485-498, Karaj, Iran. fziaie@nrcam.org
F
F
Ziaie
N
N
Hajiloo
A
A
Alipour
R
R
Amraei
S I
SI
Mehtieva
D002138:Calibration; D003743:Dental Enamel / Q000737:chemistry / Q000528:radiation effects; D017886:Durapatite / Q000032:analysis* / Q000138:chemical synthesis / Q000528:radiation effects*; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D005609:Free Radicals / Q000528:radiation effects*; D006801:Humans; D016014:Linear Models; D008855:Microscopy, Electron, Scanning; D049329:Nanostructures / Q000032:analysis* / Q000528:radiation effects / Q000648:ultrastructure; D011874:Radiometry / Q000379:methods*; D012044:Regression Analysis; D012189:Retrospective Studies; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction / Q000379:methods
D005609:Free Radicals; D017886:Durapatite