A novel technique for calculating the particles emerging from a radiotherapy machine head using a transport matrix technique.
Original Publication Date: 2003-Oct-24
Included in the Prior Art Database: 2003-Oct-24
The aim of external radiotherapy treatment is to deliver a curable dose to local cancerous tissue in a patient while keeping the dose in healthy tissues as low as possible in the shortest time possible. In order to design the patient treatment delivery correctly, it is essential to calculate the dose distribution throughout the target volume and within normal tissue as accurately as possible. There are two main methods of achieving this. One is the use of Monte Carlo techniques simulate the production of radiation particles and their interactions within patients. The other is to use deterministic methods. The deterministic methods are used, even though the Monte Carlo techniques are seen as accurate, due to the relative speed of calculation. The Monte Carlo techniques take too long in a clinical environment. A new way of calculating the dose distribution is disclosed which is comparable in quality to the Monte Carlo techniques but in a much shorter time.