MEDRADSC 2X03 Lecture Notes - Lecture 9: Linear Energy Transfer, Dose Fractionation, Photon
28 Jul 2019
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What you know about linear energy transfer (let) so far . Showing the difference b/n cell survival curves for different amounts of radiation. 0. 1 = 10% is left of initial surviving fraction. The higher the let (alpha) = less dose compared to the rest (less is needed to cause cell killing) Neutrons are 3x more damaging than x-rays bc we need amount of dose to acquire the exact same effect. How easy is it to transfer energy into the body/cell. Definition: quantity of energy deposited per unit path length of radiation through matter. Think of a white pool ball breaking up the rest of the balls in the triangle. There is not just 1 interaction, once the photon hits a cell, more interactions end up happening. How much energy is apart of an ionization or an excitation. Showing the path of 1 electron with 350 kev. End of the line = when the electron runs out of energy.
