Effect of scattering and electronic noise upon selection of detectors for Gamma Computerized Tomography

TL;DR

This paper compares three gamma-ray detectors used in CT to determine which yields the lowest noise, focusing on scattering and electronic noise, to improve image quality in computed tomography.

Contribution

It introduces a comparative analysis of gamma-ray detectors for CT, highlighting the IC CsI(Tl) scintillation detector's superior noise performance.

Findings

IC CsI(Tl) detector has lower electronic and scattering noise

Kanpur Theorem-1 effectively quantifies scattering noise levels

NaI(Tl) and HPGe detectors exhibit higher noise levels

Abstract

Computed tomography (CT) has become a vital tool in a variety of fields as a result of technological developments and continual improvement. High-quality CT images are desirable for image interpretation and obtaining information from CT images. A variety of things influence the CT image quality. Various research groups have investigated and attempted to improve image quality by examining noise/error associated with CT geometry. This study aims to select detectors for CT, which yield the least amount of noise in projection data. Three distinct gamma-ray detectors that are routinely used in CT have been compared in terms of scattering and electrical noise. The sensitivity of Kanpur Theorem-1 to scattering noise is demonstrated in this work and used to quantify the relative level of scattering noise. The detector measures the signal multiple times, and the standard deviation of the signal is used to calculate the electronic noise. It is observed that IC CsI(Tl) scintillation detector produces low electronic noise and relative scattering noise as compared to conventional electronic detectors; NaI(Tl) and HPGe.