Comparison of gamma (Anger) camera systems in terms of detective quantum efficiency using Monte Carlo simulation

Abstract

The results indicate that the manufacturers have succeeded differently in their attempts to design a system constituting an optimal compromise between sensitivity and spatial resolution.

A new PET resolution measurement method through Monte-Carlo simulations

“…In contrast, in this study, averaged PSF profiles are obtained after integration of line profiles passing through the center of the point image and covering various angles ranging from 0°to 180°with a 2°angle step. The FWHM as a measure of spatial resolution lacks the possibility for correct and complete system characterization, as different PSF shapes may show equal FWHM values [12].…”

“…To evaluate the performance of PET scanners, the PSF in a slice profile has traditionally been used [10,11]. The full width at half maximum (FWHM) of this function, which is used to measure the spatial resolution, lacks the possibility for complete system characterization and needs to be improved, as different PSF shapes may show equal FWHM values [12]. The response of the system to the incident signal amplitudes can be described by the MTF, which expresses the system's response in the spatial frequency domain by taking the Fourier transform of the corresponding PSF from a reconstructed cross-sectional image.…”

Monte Carlo Simulation of a Uniform Response Silicon X-ray Detector

“…Emitted gamma rays should be deposited in the silicon detector in order to find the response of the detector. So we need to construct the geometry in such a way that gamma rays are absorbed in the silicon detector [6,7]. So we are placing an aluminum foil before the silicon detector.…”