Algorithm for a wireless, motion and position-sensing, integrating radiation sensor for occupational and environmental dosimetry

摘要

Described is an apparatus, method and machine-readable medium for determining radiation dosages based on a solution vector for each radiation field and an objective function.

主权项

1. An apparatus comprising: one or more processors, and a machine-readable medium for storing instructions thereon which when executed by the one or more processors cause the one or more processors to perform operations comprising the following steps:
(a) determining radiation dose values for a response matrix by determining a radiation dose value for each radiation field in a response matrix from a plurality of detector elements of a dosimeter, (b) determining a final net radiation dose value for each radiation field in the response matrix, and (c) displaying the final net radiation dose value for each radiation field in the response matrix to a user and/or saving the final net radiation dose value for each radiation field to a first storage medium, wherein each radiation field has a radiation source, wherein step (b) comprises conducting a numerical optimization process comprising the following steps:
(i) generating an initial solution vector for each radiation field,(ii) iteratively updating the initial solution vector for each radiation field until an objective function is minimized to thereby generate an optimal solution vector, and(iii) determining a radiation dose value for each radiation field based on the optimal solution vector for the source, wherein the objective function issj=∑i=14⁢(Gij-G_jσij⁢G_j)2⁢sj=∑i=14⁢(Gij-G_jσij⁢G_j)2 where i is the number of detector elements of the dosimeter,where j is the number of radiation fields,where Gj is are expected values of one or more dose conversion factors for radiation field j,where Gij is the dose computed for the ith element of the dosimeter and the jth radiation field, andwhere σij is a total uncertainty of a stored response for the ith detector element of the dosimeter and jth radiation field, and wherein each stored response is one of a plurality of stored responses stored on a second storage medium.