Lung counter measuring system

Abstract

The invention belongs to the radiation protection technology, and particularly relates to a measuring system used for directly measuring radionuclide deposited in a lung outside a body. The technical scheme includes that a lung counter measuring system is characterized by comprising a measuring instrument (1), a positioning device (2), a measuring bed (3), a spectrometer (4) and a computer, wherein the computer is provided with passive efficiency mark software and dose calculating software. The lung counter measuring system can be used for the direct measurement of the radionuclide deposited in the lung outside the body. Due to the fact that the bed body, a detector and the like are all shielded, interference of nature background radial rays is avoided to a certain degree. The positioning device enables the detector to be parallel to the irregular wall of a chest as far as possible, and the detector is enabled to receive radial rays emitted from the radionuclide in the lung to the maximum degree, measuring effect is guaranteed, and measuring precision is improved.

Description

technical field [0001] The invention belongs to radiation protection technology, in particular to a measuring system for directly measuring radionuclides deposited in the lungs in vitro. Background technique [0002] Radionuclides such as U and Pu may enter the human body through the respiratory tract and deposit in the lungs. Since these nuclides have a long half-life and are difficult to metabolize through the circulatory system, they will cause serious internal radiation damage to the human body. [0003] Internal irradiation technology monitoring technology includes two methods of living body measurement and excreta measurement. After applying these two methods to obtain the intake of radionuclides in the body, the committed effective dose caused by the nuclides can be further deduced. The in vivo measurement method is to place the detector at a certain position outside the body, and realize the internal radiation monitoring through the signal response of the detector t...

AI Technical Summary

Problems solved by technology

If the amount of radionuclides in the body is sufficient to generate a significant signal response from the detector, more accurate results can be obtained using biometric techniques than measuring excreta, because biometric techniques are fast and sensitive and do not need to consider the presence of nuclides in the body. The metabolic process in the body and its excretion rate, and some radionuclide doses are difficult to measure through metabolites such as urine

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