US 12,329,985 B2
Method and apparatus for adjusting dose rates, computer device, and storage medium
Yue Wu, Xi'an (CN); and Hong Cheng, Xi'an (CN)
Assigned to OUR UNITED CORPORATED, Xi'an (CN); and SHENZHEN OUR NEW MEDICAL TECHNOLOGIES DEVELOPMENT CO., LTD., Shenzhen (CN)
Filed by OUR UNITED CORPORATION, Xi'an (CN); and SHENZHEN OUR NEW MEDICAL TECHNOLOGIES DEVELOPMENT CO., LTD., Shenzhen (CN)
Filed on Feb. 24, 2023, as Appl. No. 18/174,430.
Claims priority of application No. 202111615191.9 (CN), filed on Dec. 27, 2021.
Prior Publication US 2023/0241412 A1, Aug. 3, 2023
Int. Cl. A61N 5/10 (2006.01)
CPC A61N 5/103 (2013.01) [A61N 5/1071 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for adjusting dose rates, comprising:
acquiring a current actual dose, a current target dose, and a current pulse frequency, wherein the current pulse frequency is indicative of a dose rate of a radiation beam emitted by radiation source equipment, the current actual dose is an actually received dose of the radiation beam for a tumor target region, and the current target dose is an expected dose of the radiation beam for the tumor target region;
calculating a dose difference value based on the current actual dose and the current target dose, wherein the dose difference value is an absolute value of a difference value between the current actual dose and the current target dose;
determining, in response to the dose difference value being not less than a target threshold, a reference compensation value based on the dose difference value, a single pulse dose, a first period, and a second period, wherein the reference compensation value is positively correlated with the dose difference value and is negatively correlated with the single pulse dose, the first period, and the second period, the single pulse dose is a dose of a signal pulse of the radiation beam emitted by the radiation source equipment, the first period is a duration required for each rotation of the radiation source equipment by a target angle, and the second period is a number of rotations of the radiation source equipment between each two adjacent adjustments of the dose rate;
determining a first correction coefficient based on the dose difference value, wherein the first correction coefficient is a value of a piecewise function of the dose difference value and is positively correlated with the dose difference value;
determining a second correction coefficient based on the reference compensation value, wherein the second correction coefficient is a value of a piecewise function of the reference compensation value and is negatively correlated with the reference compensation value;
determining a pulse frequency compensation value based on the first correction coefficient, the second correction coefficient, the current pulse frequency, and the reference compensation value;
acquiring an output pulse frequency by adjusting, based on the pulse frequency compensation value, the current pulse frequency; and
updating, based on the output pulse frequency, the dose rate of the radiation beam emitted by the radiation source equipment.