Multileaf Collimator Shape Matrix Decomposition............ thomas kalinowski

The most common approach in treatment planning is to divide the optimization into two phases. At first step, a set of beam angles and corresponding fluence matrices are determined. In a second step, a sequence of leaf positions for the MLC for each of the angles is determined that yields the desired fluence distribution. Very recently, there have been attempts to combine both steps into one optimization routine [8,20].