Advanced Physics for Brachytherapy 2018
2D Anisotropy Function
• F ( r , θ ) is always unity for a perfect point source
• F ( r , θ ) = 1 at θ 0
• F ( r , θ ) accounts for dose-rate variation over angles due to differing attenuation by source capsule, internal components, …
• Must know source orientation use 2D formalism – otherwise, use the 1D formalism
slide courtesy of Luc Beaulieu
Made with FlippingBook - professional solution for displaying marketing and sales documents online