Title: Geometric Algorithms for Intensity-Modulated Radiation Therapy Delivery Planning Speaker: Shuang (Sean) Luan, Department of Computer Science and Department of Radiology University of New Mexico Date/Time: Wednesday, April 13, 2005, 10:00-11:00 am Location: Building 980, Room 95 (Sandia NM), Building 921, Room 137 (Sandia CA) Brief Abstract: Intensity-modulated radiation therapy (IMRT) is a modern cancer treatment technique and aims to deliver a highly conformal dose to a target tumor while sparing the surrounding sensitive structures. A key to performing IMRT is the accurate and efficient delivery of discrete dose distributions using the linear accelerator and the multileaf collimator. The IMRT delivery planning problems arise in such scenarios, whose goal is to determine a control sequence of the linear accelerator and the multileaf collimator that creates a prescribed dose distribution both accurately and efficiently. In this talk, I will present some new delivery planning algorithms and software. Our new algorithms, which are based on geometric optimization techniques, are very efficient and guarantee the optimal quality of the output treatment plans. Comparisons between our software with commercial planning systems and the current most well known leaf sequencing algorithm in the medical literature showed substantial improvement. Our software has already been used for treating cancer patients at a couple of medical centers. |