Relative estimation of scattering noise and its utility to select radiation detector for Gamma CT scanner

TL;DR

This paper introduces a new method to separately estimate electronic and scattering noise in gamma detectors, aiding in optimal detector selection for Gamma CT scanners by analyzing noise contributions and their dependencies.

Contribution

A novel methodology combining mathematical tools and experimental CT techniques to estimate electronic and scattering noise separately in gamma detectors.

Findings

Detectors with integrated electronics have ~33% less electronic noise.

Scattering noise depends strongly on mass attenuation coefficients.

Predicted and estimated scattering differ by 14.6%.

Abstract

This study investigates two unavoidable noise factors: electronic noise and radiation scattering, associated with detectors and their electronics. This study proposes a novel methodology to estimate electronic and scattering noise separately. It utilizes mathematical tools, namely, Kanpur theorem-1, standard deviation, similarity dice coefficient parameters, and experimental Computerized Tomography technique. Four types of gamma detectors: CsI (Tl), LaBr_3 (Ce), NaI (Tl) and HPGe are used with their respective electronics. A detector having integrated circuit electronics is shown to impart significantly less (~33% less) electronic noise in data as compared to detectors with distributed electronics. Kanpur Theorem-1 signature is proposed as a scattering error estimate. An empirical expression is developed showing that scattering noise depends strongly on mass attenuation coefficients of detector crystal material and weakly on their active area. The difference between predicted and estimated relative scattering is 14.6%. The methodology presented in this study will assist the related industry in selecting the appropriate detector of optimal diameter, thickness, material composition, and hardware as per requirement.