Dose-response curve slope improvement and result reproducibility of ferrous sulphate doped gels analyzed by NMR imaging
Articolo
Data di Pubblicazione:
1994
Citazione:
Dose-response curve slope improvement and result reproducibility of ferrous sulphate doped gels analyzed by NMR imaging / G. Gambarini, S. Arrigoni, M.C. Cantone, N. Molho, L. Facchielli, A.E. Sichirollo. - In: PHYSICS IN MEDICINE AND BIOLOGY. - ISSN 0031-9155. - 39:4(1994), pp. 703-717. [10.1088/0031-9155/39/4/004]
Abstract:
Ferrous sulphate gel analysed by relaxation time measurements with NMR imaging is considered a useful dosimeter for 3D determinations of absorbed dose. A protocol for the gel preparation with agarose SeaPlaque that leads to a dosimeter with very high dose sensitivity is described. The dose-response curve slope is about 0.2 s-1 Gy-1 and the G factor turns out to be ~185 ions per 100 eV of absorbed energy. A method for making the measurements and analysing the results that brings about good result reproducibility is suggested. A thorough experimental study of the dependence of the dosimeter response on the elapsed time from preparation to irradiation and from irradiation to NMR measurement has revealed good reproducibility. The above characteristic of the gel system is very interesting, because it shows the possibility of utilizing the dosimeter for absolute dose determinations with satisfactory reliability.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
G. Gambarini, S. Arrigoni, M.C. Cantone, N. Molho, L. Facchielli, A.E. Sichirollo
Link alla scheda completa: