Radiation detection method and system using the sequential probability ratio test

a probability ratio and detection method technology, applied in the field of radioation detectors and detection methods, can solve the problems of difficult to determine “a priori, difficult to rely on a single parameter set, and difficult to detect radioactive substances

Active Publication Date: 2007-01-25
LAWRENCE LIVERMORE NAT SECURITY LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a computer system that can accurately predict how much radiation from an object being observed has been emitted by another object during a certain period of time. This helps identify any potential threats or issues with the objects being monitored.

Problems solved by technology

The technical problem discussed in this patent text relates to improving the efficiency of radiation detection techniques while reducing the risk of false alarms caused by environmental factors like ambient light interference.

Method used

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  • Radiation detection method and system using the sequential probability ratio test
  • Radiation detection method and system using the sequential probability ratio test
  • Radiation detection method and system using the sequential probability ratio test

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Embodiment Construction

[0021] Generally, the present invention pertains to a radiation detection method and system using the SPRT for triggering an alarm or otherwise providing event notification in radiation detection equipment upon detecting an elevated background radiation event in a field of view. The basic purpose of the device is to provide a proximity alarm whenever a radiation source has entered the field of view (FOV) at a rate consistent with a vehicle traveling through the detection area. This is accomplished without the aid of a presence detector and with no predefined paths of travel.

[0022] For this purpose, it is appreciated that the present invention includes, or is adapted to operate in conjunction with one or more radiation sensors, such as for example, NaI, scintillator, or He3 neutron detector) which are capable of detecting neutrons and / or gammas and producing either simple gross counts or an energy spectrum. Thus the present invention may be incorporated into and utilized with radiati

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Abstract

A method and system using the Sequential Probability Ratio Test to enhance the detection of an elevated level of radiation, by determining whether a set of observations are consistent with a specified model within a given bounds of statistical significance. In particular, the SPRT is used in the present invention to maximize the range of detection, by providing processing mechanisms for estimating the dynamic background radiation, adjusting the models to reflect the amount of background knowledge at the current point in time, analyzing the current sample using the models to determine statistical significance, and determining when the sample has returned to the expected background conditions.

Description

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Claims

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Application Information

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Owner LAWRENCE LIVERMORE NAT SECURITY LLC
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