Determination of energy windows for the triple energy window scatter correction method in Gd-159 SPECT using Monte Carlo simulation

Document Type: Original Paper

Authors

1 Physics,Faculty of sciences, University Mohammed V Rabat

2 Departement of Physics, Laboratory of High Energy Physics, Modelling and Simulation, Faculty of Science, Mohammed V Agdal University, Rabat, Kingdom of Morocco

3 Physics, faculty of sciences, University Mohammed V Rabt

4 Academic hospital of Udine

Abstract

Purpose : In radio-nuclides imaging, object scatter is one of major factors which leads to degradation of image quality. Therefore, the correction of scattered photons has a great impact to improve the image quality. The aim of this work was to determine the main and sub-energy windows for the triple energy window (TEW) scatter correction method using Monte Carlo simulation SIMIND code for Gadolinium-159 (Gd-159) imaging.
Methods : Energy window was set for various main energy window width (10,15 and 20%) and sub energy window width (3 and 6 keV). Siemens Medical System Symbia fitted with High Energy collimator (HE) was imaged with Gd-159 point source positioned at seven locations inside cylindrical water phantom. The true primary to total ratio (calculated by SIMIND) and the primary to total ratio estimated using TEW method were compared.
Results : A 20% of main energy window with 3 and 6 keV sub-energy windows were found to be optimal for implementation of the TEW method in Gd-159.
Conclusion: The obtained results provide the optimal energy window for Gd-159 scintigraphy data and will aid the quantification of Gd-159 imaging.

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Articles in Press, Accepted Manuscript
Available Online from 25 February 2019
  • Receive Date: 15 October 2018
  • Revise Date: 12 December 2018
  • Accept Date: 25 February 2019