With what energy must the radiation be given to image a bone of thickness 5 cm which has covering of skin of thickness of 2 cm on the both sides and the emerging intensity of the X – Ray is 200MeV. (impedance for bone = bfor skin = s )(a) 2000e^9(b) 200e^(4s + 5b)(c) 20/e(d) 2eThe question was posed to me during an interview.Question is taken from Diathermy, Measurement of Radiation, Dose and its Calculations topic in chapter Radiation Therapy of Clinical Science

With what energy must the radiation be given to image a bone of thickn

1.	With what energy must the radiation be given to image a bone of thickness 5 cm which has covering of skin of thickness of 2 cm on the both sides and the emerging intensity of the X – Ray is 200MeV. (impedance for bone = bfor skin = s )(a) 2000e^9(b) 200e^(4s + 5b)(c) 20/e(d) 2eThe question was posed to me during an interview.Question is taken from Diathermy, Measurement of Radiation, Dose and its Calculations topic in chapter Radiation Therapy of Clinical Science
Answer» CORRECT choice is (B) 200e^(4s + 5b) The explanation is: The formula GOES like : I = I0e^(-μt) where I is the final radiation, I0 is the initial radiation, μ is the impedance and t is the thickness. Since we know the emerging radiation, by using back processing formula, we get 200e^(4s+5b).

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