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AgusCF
If I study the dose in water with the Black-Gray cavity and the equation for electronic equilibrium... Why I obtain similar results for the same value of MV? Someone knows? Thanks! [Sorry for my english :( ]
Yes, sorry, Bragg- Gray. I mean (as exercise) I calculate the dose in water for 45 MV by Bragg-Gray cavity and by the equation for electronic equilibrium (i do not know its proper name) and I obtained similar values. My question is: Why? I thought that i must obtain very diferent values.gleem said:Your mean Bragg-Gray don't you? Could you please elaborate on your issue? Your question does not make sense as stated,
Well I found the answer. It seems that the charged particle equilibrium it is not a restrictive condition; particulary at low energies is less restrictive than at high energies.gleem said:Bragg Gray Theory assumes that charged particle equilibrium exists at the position of a small cavity in a medium , that the ionization produced in the cavity is proportional to the absorbed dose and that the cavity does not significantly change the spectral characteristics of the ionizing radiation at the cavity position.
Radiophysics Bragg-Gray is a method used in radiation dosimetry to measure the absorbed dose of ionizing radiation in a material. It is named after physicists William Henry Bragg and his son William Lawrence Bragg, who developed the Bragg-Gray method in the early 1900s.
The Bragg-Gray method involves measuring the ionization produced by radiation in a material, typically a gas or a solid. This ionization is then converted into an electrical signal, which can be measured and correlated to the absorbed dose of radiation in the material.
The Bragg-Gray method is a reliable and accurate way to measure the absorbed dose of radiation. It is also relatively simple and inexpensive compared to other methods, making it a popular choice for radiation dosimetry in research and medical settings.
One limitation of the Bragg-Gray method is that it is only suitable for measuring the absorbed dose of ionizing radiation. It cannot measure other forms of radiation, such as non-ionizing radiation. Additionally, the accuracy of the measurements can be affected by factors such as temperature, pressure, and humidity.
The Bragg-Gray method is commonly used in medical physics to measure the absorbed dose of radiation in patients undergoing radiation therapy. It helps ensure that the prescribed dose is delivered accurately and helps monitor the effects of radiation on the patient's tissues. It is also used in quality assurance measures for radiation equipment in medical facilities.