US 12,226,656 B2
Orthogonal double-layer grating dynamic intensity modulation segmentation method based on quadrant
Yunfei Xiang, Suzhou (CN); Huer Wen, Suzhou (CN); and Jonathan Yi Yao, Suzhou (CN)
Assigned to SUZHOU LINATECH MEDICAL SCIENCE AND TECHNOLOGY CO., LTD., Suzhou (CN)
Appl. No. 17/915,385
Filed by SUZHOU LINATECH MEDICAL SCIENCE AND TECHNOLOGY CO., LTD., Suzhou (CN)
PCT Filed Nov. 20, 2020, PCT No. PCT/CN2020/130429
§ 371(c)(1), (2) Date Sep. 28, 2022,
PCT Pub. No. WO2021/248837, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 202010515666.6 (CN), filed on Jun. 8, 2020.
Prior Publication US 2023/0132237 A1, Apr. 27, 2023
Int. Cl. A61N 5/10 (2006.01)
CPC A61N 5/1036 (2013.01) [A61N 5/103 (2013.01); A61N 5/1031 (2013.01); A61N 5/1045 (2013.01); A61N 5/1047 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An orthogonal dual-layer grating dynamic intensity modulation segmentation method based on a quadrant including the following steps:
S1: calculating a fluence distribution under each radiation field by a treatment planning system, the fluence distribution can be expressed as a fluence F(x,y) within a radiation field range in an isocenter plane;
S2: using an orthogonal double-layer collimator for a fluence segmentation;
S3: dividing the quadrant, and dividing each radiation field surrounded by an upper leaf, a lower leaf, a left leaf, and a right leaf into at least two quadrants, to obtain the fluence distribution and a corresponding leaf sequence of each quadrant;
S4: performing regional planning of the fluence F(x,y) in each quadrant to obtain multiple different regions, and determining a segmentation mode of different regions; and
S5: for any quadrant, using two mutually orthogonal leaf groups for the fluence segmentation.