Advanced Physics for Brachytherapy 2018

The MC method …

Choosing interaction site. The probability that a photon interacts within dx after travelling a distance x is μexp(-μx) so that:

Choosing interaction type. Interaction type is a discrete random variable of i values so that P i =μ i /μ total . So given r, I choose interaction j so that:

j= min{ j:

}

Figure from: Venselaar, Baltas, Meigooni, Hoskin (Eds), Comprehensive Brachytehrapy: physical and clinical aspects. CRC Press, Taylor & Francis, © 2013