DOSE INDEXING DEVICE, DOSE INDEXING METHOD, AND MEASUREMENT DEVICE HAVING DOSE INDEXING FUNCTION

摘要

A dose indexing device 50 provided with: a detector 20 for detecting a physical quantity as a voltage; a V/I conversion element 28 for converting the physical quantity from a voltage to a current; a recording unit 51 in which the amount of span deviation from a true value and the zero-point current of the V/I conversion element 28 are recorded by the emitting of radiation; a correlation holding unit 52 for holding zero-point shift data that indicates the correlation between a cumulative radiation dose acquired in advance and the zero-point current, and span shift data that indicates the correlation between the cumulative radiation dose and the amount of span deviation; a first estimation unit 53 for estimating at least one cumulative radiation dose of the V/I conversion element 28 on the basis of the zero-point shift data and the zero-point current recorded by the recording unit 51; a second estimation unit 54 for estimating at least one cumulative radiation dose of the V/I conversion element 28 on the basis of the span shift data and the amount of span deviation recorded by the recording unit 51; and a comparison unit 56 for comparing the cumulative radiation doses estimated by the first estimation unit 53 and the second estimation unit 54 and specifying a shared cumulative radiation dose as the true cumulative radiation dose.