Statistical Studies on Sequential Probability Ratio Test for Radiation Detection

A Sequential Probability Ratio Test (SPRT) algorithm helps to increase the reliability and speed of radiation detection. This algorithm is further improved to reduce spatial gap and false alarm. SPRT, using Last-in-First-Elected-Last-Out (LIFELO) technique, reduces the error between the radiation measured and resultant alarm. Statistical analysis determines the reduction of spatial error and false alarm

Prototyping the new-guard portable device for radiation detection

A novel and efficient radiation detection algorithm fused together with a new generation detection unit will produce an effective detector to battle field radiation measurement problems and reduce field surveyor work hazards. The SPRT (Sequential Probability Ratio Test) algorithm helps increase reliability and speed of radiation detection; the new generation detector improves the detector\u27s flexibilities, applications, and functions. A prototype system of the New Generation User Adaptable Radiation Detector (New-GUARD) is developed and analyzed to determine the system feasibility of usage, development, and safety for radiation detection. Development stages include the implementation of the Graphical User Interface (GUI), building the ideal hardware components for the detection unit, and the integration of the two to form the complete New-GUARD system. The New-GUARD GUI is created using the Visual Basic .NET programming language along with the .NET Compact Framework and Windows Mobile 6 SDK for all Windows Mobile based devices. The hardware portion is implemented using a microcontroller that sends data out to the GUI via a wireless transmission medium. New-GUARD system performance metrics are provided to show real-time processing capabilities. Lastly, alternative New-GUARD hardware designs as well as a future plan to eliminate human presence entirely from radiation fields are discussed

A study of SPRT algorithm and New-Guard for radiation detection

A novel and efficient radiation detection algorithm combined with a measuring unit will produce an ideal detector to battle field radiation measurement problems. Studies of Sequential Probability Ratio Test (SPRT) for radiation detection are essential towards developing efficient and accurate radiation detection algorithms. In this study, the performance of the classical Single-Threshold-Test (STT) and the SPRT First-In-First-Out (FIFO) algorithms is considered. Next, improvements made by the Last-In-First-Elected-Last-Out (LIFELO) algorithm are analyzed. Further, enhancements to the LIFELO algorithm, using the Dynamic Background Updating and Maximum Likelihood Estimator (MLE), are performed; The thesis also provides detailed requirements for an innovative hand-held radiation detection system and underlines additional features available on a New Generation User Adaptable Radiation Detector (New-GUARD) to help the field survey processes. Currently available technologies are studied to rationalize the need for the New-GUARD prototype. The New-GUARD is compared to similar products that are already available in the market to show its completeness as a radiation detector incorporated with Global Positioning System (GPS), wireless communication, and a self-correcting system. Primary performance evaluations of the algorithms are executed using Mathematica and further analysis is carried out with Matlab and C