A method for controlling radiation delivery from a radiation source to a treatment area with a multi-leaf collimator. The method includes dividing the treatment area into a plurality of cells each having a predefined treatment intensity level and defining an edge margin on a portion of the cells. The...http://www.google.com/patents/US6330300?utm_source=gb-gplus-sharePatent US6330300 - High definition intensity modulating radiation therapy system and method