4 results about "Dose verification" patented technology

This specification discloses a dose verification method, apparatus, storage medium, and electronic device, relating to the field of radiotherapy technology. It can acquire target distance, equipment distance, detector convolution kernel, CT correction factor, detector dose data, and irradiation distances at multiple dose accumulation points. Based on the dose data at each coordinate point and the detector scattering convolution kernel, the initial deposited dose corresponding to each target point is determined. Then, based on the equipment distance, target distance, and the initial deposited dose at each coordinate point, the output beam intensity of the radiation device is determined. Based on the output beam intensity, initial deposited dose, equipment distance, CT correction factor, and irradiation distances at multiple dose accumulation points, the dose distribution at each dose accumulation point is determined. Finally, the dose distribution is compared and verified with the planned dose distribution. It is evident that the dose verification process considers the influence of various factors such as radiation device performance and detector position, thus improving the accuracy of dose verification.

This invention discloses an intelligent adaptive dose verification calculation method and system. The intelligent adaptive dose verification calculation method includes: obtaining preliminary dose distribution data for a patient based on a deep learning-based dose prediction model; dynamically assigning variance reduction parameters to particles in a Monte Carlo simulation based on the high and low dose distribution information in the preliminary dose distribution data, wherein the variance reduction parameters include simulation weights, with simulation weights assigned to particles predicted to be in high-dose regions being less than those assigned to particles predicted to be in low-dose regions; and using a Monte Carlo dose calculation engine, simulating the planned beam based on the dynamically assigned variance reduction parameters to obtain high-precision verification dose distribution data. This invention's intelligent adaptive dose verification calculation method ensures the physical authenticity of the final verification dose distribution and the credibility of the "gold standard."

The utility model relates to the technical field of applicator in cervical cancer radiotherapy, disclose a kind of verification cervical cancer after-loading radiotherapy real dose applicator, including applicator body and thermoluminescence detector.Applicator body includes guide tube and radioactive source support block, the one end of guide tube is used to connect with after-loading therapeutic instrument, radioactive source support block is fixedly connected with the other end of guide tube, and radioactive source support block is internally provided with the radioactive source cavity matched with the other end of guide tube, and installation groove is provided on the outer surface of radioactive source support block, and thermoluminescence detector is detachably installed in installation groove.It can improve the low problem of dose verification accuracy of conventional applicator in prior art.

This application relates to the field of radiotherapy technology, specifically to a method for predicting three-dimensional radiotherapy dose distribution for proton and heavy ion radiotherapy equipment. The method includes: generating a reference dose curve containing detector response and a standard three-dimensional dose distribution map under ideal conditions; calculating the gradient weights of each depth point to divide different sampling intervals and perform differentiated sampling to obtain observation depth points; obtaining the measured dose values ​​collected by the detector at each observation depth point; matching and mapping the sparse observation depth points onto the dense reference dose curve to determine the matching depth point corresponding to each observation depth point on the curve; calculating the intensity scaling factor characterizing the beam output intensity; calculating the range deviation characterizing the beam penetration depth; and performing spatial translation transformation and global dose correction on the standard three-dimensional dose distribution map to generate a predicted three-dimensional dose distribution map that eliminates detector interference. This application improves the accuracy and efficiency of dose verification for radiotherapy equipment.