4 results about "Dose estimation" patented technology

The application provides a voxel-level radionuclide dose estimation method based on radionuclide imaging and a computer device. The method comprises the following steps: acquiring X-ray structural images and gamma-ray functional images at a single time point or multiple time points; segmenting a region of interest to obtain multiple sub-regions of interest; performing regional partial volume correction on the multiple sub-regions of interest of the gamma-ray functional images to obtain corrected gamma-ray functional images; performing registration on the corrected gamma-ray functional images; performing activity-dose rate conversion on the registration results to obtain a dose rate, and performing voxel-level curve fitting and integration on the dose rate to obtain an absorbed dose distribution result, and determining the absorbed dose of each sub-region of interest based on the absorbed dose result. The application can reduce the influence of the partial volume effect on the resolution of radionuclide imaging, improve the accuracy of radionuclide image registration, and further improve the accuracy of radionuclide absorbed dose estimation.

The application discloses a kind of nuclear medicine department radioactive sewage discharge environmental impact assessment method, equipment and medium, it is related to radiation environmental impact assessment technical field, solve the current radiation environmental impact assessment technology cannot provide the influence of different discharge routes to public dose Technical problems, its technical scheme main point is to the condition that radioactive nuclide-containing wastewater is discharged into urban sewage pipe network, the public dose after radioactive nuclide-containing wastewater is discharged into landscape water and receiving water body is calculated respectively, and the deposition concentration on the surface of vegetation soil and the deposition concentration on the surface of crop soil are redefined, improve the accuracy of public dose estimation, can simply and accurately evaluate the radiation dose caused to public.

The invention relates to the technical field of nuclear radiation evaluation, in particular to a rapid population biological dose evaluation system used under the condition of large-scale ionizing radiation exposure. According to the rapid evaluation method, the analysis efficiency can be improved, the dose can be accurately estimated, and the rapid and effective method can replace manual DCA dose estimation. The method and the curve can be potentially applied to a triage mode and serve as an alternative scheme for manual analysis under large-scale radioactive events, and rapid dose evaluation is achieved.

Computer-implemented method for dose estimation for the irradiation of an object (5) with ionizing radiation, wherein a three-dimensional model with a total number (9) of spatial elements is provided on a storage element (4), wherein the model specifies a material composition of the object (5) for each spatial element, and by means of a computing unit (3) - for a connected neighborhood (10) of spatial elements of the total number (9) of spatial elements, depending on the respective material compositions of all spatial elements of the neighborhood of the model, a neighborhood material composition is determined by averaging or homogeneously approximating one or more material parameters of the respective material compositions; - a radiation dose for the neighborhood (10) with respect to ionizing radiation is determined by means of a simulation depending on the neighborhood material composition; and - a dose distribution for the object (5) with respect to ionizing radiation is determined based on the radiation dose for the neighborhood (10).