Types of Radiotherapy Dose Calculation Algorithms

About this Video

• Video Title: Types of Radiotherapy Dose Calculation Algorithms
• Channel: MedPhysMan
• Speakers: (Unnamed Speaker)
• Duration: 00:07:23

Introduction

This video explains the three main categories (Type A, B, and C) of radiotherapy dose calculation algorithms. The speaker details the characteristics of each type, including their methods for handling electron transport and the level of physical accuracy in their dose absorption process models.

Key Takeaways

• Type A algorithms: These algorithms use correction factors to convert dose from a known scenario (calibration condition) to a new scenario. They assume charged particle equilibrium. Examples include hand calculations.
• Type B algorithms: These algorithms approximately account for changes in electron transport. They often use convolution/superposition techniques with pre-calculated dose kernels (often derived from Monte Carlo simulations). Examples include pencil beam algorithms, anisotropic analytical algorithms, collapse cone convolution, and multi-grid superposition.
• Type C algorithms: These algorithms rigorously account for the physics of dose absorption. Examples include Monte Carlo simulations (considered the gold standard) and linear Boltzmann transport equation solvers (e.g., Acuros). Type C algorithms are more computationally intensive but provide greater accuracy.