Radiation measuring system based on optimal measurement geometry and radiation measuring method using the same

摘要

A radiation measuring system includes a whole-body counter having upper and lower radiation detectors that are located in front of a measurement space, which has an inlet passage and is located in a housing, and that detects respective internal radiations of a measurement target and first and second internal radiations of a body region corresponding to one of a thyroid gland, a lung, a whole body, or a hypogastrium, and a processor controlling determination of an internal radioactive contamination location of the measurement target, based on a ratio of the first and second internal radiations, applying the optimal measurement mode corresponding to the ratio of the first and second internal radiations, and detecting the first and second internal radiations of a body region corresponding to the internal radioactive contamination location.

主权项

1. A radiation measuring system comprising:
a whole-body counter having upper and lower radiation detectors that are installed in front of a measurement space, wherein
the measurement space has an inlet passage and is located in a housing, andthe counter detects respective internal radiations of a measurement target and first and second internal radiations of a human body region corresponding to one of a thyroid gland, a lung, a whole body, and a hypogastrium; and a processor including:
a calculator calculating a ratio of the first internal radiation of the measurement target, which is detected by the upper radiation detector, to the second internal radiation of the measurement target, which is detected by the lower radiation detector, and adding the detected first and second internal radiations of the corresponding body region to produce an added value;a controller
determining whether the ratio of the first and second internal radiations is within a first range of between 80 and 100 to between 0 and 20, a second range of between 65 and 80 to between 20 and 35, a third range of between 40 and 65 to between 35 and 60, or a fourth range of between 0 and 40 to between 60 and 100, by referencing lookup tables,determining an internal radioactive contamination location of the human body according to the ratio,controlling the upper and lower radiation detectors to apply a thyroid gland measurement mode if the ratio is within the first range, to apply a lung measurement mode if the ratio is within the second range, to apply a whole-body measurement mode if the ratio is within the third range, or to apply a hypogastrium measurement mode if the ratio is within the fourth range, anddetecting the first and second internal radiations of the body region corresponding to one of the thyroid gland, the lung, the whole body, and the hypogastrium; andan output unit outputting the added value of the detected first and second internal radiations of the corresponding body region from the calculator.