Using High Energy Lasers to Heat and Kill the Cells in an Internal Cancerous Body Tumor

High energy lasers are expected to be useful in the future to heat and kill the cells in internal cancerous human body tumors. It is proposed to use several very thin bers to transfer the energy from the laser sources to the surface of a tumor or to any inner point of a tumor. Each laser source may produce a steady state signal or may produce a time signal corre- sponding to a pulsating function. Prior to the treatment with the lasers we in- ject a substance that accumulate in the tumor and increases the absorption of heat in the tumor. Results with a simple circular 2D tumor and 4 bers with endpoints distributed equidistant on the tumor surface is presented for two sets of ab- sorption coefcients. The 2D model can be extended to a 3D model. The 3D model can be used to optimize the location of the end point of each ber and to optimize the energy level in each ber for an arbitrary 3D form of a tumor.