US 10,376,713 B2
Radiation therapy planning system, radiation therapy planning method, and radiation therapy system
Taisuke Takayanagi, Tokyo (JP); Shusuke Hirayama, Tokyo (JP); and Shinichiro Fujitaka, Tokyo (JP)
Assigned to Hitachi, Ltd., Tokyo (JP)
Appl. No. 15/513,276
Filed by HITACHI, LTD., Tokyo (JP)
PCT Filed May 12, 2015, PCT No. PCT/JP2015/063689
§ 371(c)(1), (2) Date Mar. 22, 2017,
PCT Pub. No. WO2016/047194, PCT Pub. Date Mar. 31, 2016.
Claims priority of application No. 2014-193472 (JP), filed on Sep. 24, 2014.
Prior Publication US 2017/0304651 A1, Oct. 26, 2017
Int. Cl. A61N 5/10 (2006.01)
CPC A61N 5/1031 (2013.01) [A61N 5/10 (2013.01); A61N 5/1043 (2013.01); A61N 2005/1034 (2013.01); A61N 2005/1087 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A radiation therapy planning apparatus, using a simplified Monte Carlo algorithm for calculating a dose to be assigned to particles by referring to an integrated dose distribution table, comprising:
an input device to input a target region and a prescription dose of an irradiated body which is to be irradiated with radiation;
a memory storing a radiation decreasing rate table indicating a relationship between a track length of the radiation to the irradiated body and a decreasing rate of the radiation; and
a processor coupled with the input device and the memory that is configured to calculate dose distribution by using the simplified Monte Carlo algorithm based on the target region and the prescription dose of the irradiated body and correct the calculated dose distribution by using the decreasing rate of the radiation of the radiation decreasing rate table stored in the memory,
wherein the calculated dose distribution is stored in the memory.