Iranian Journal of Medical Physics

Iranian Journal of Medical Physics

Energy Window Selection for Bremsstrahlung 90Y SPECT-CT Imaging: A Phantom Study

Document Type : Original Paper

Authors
Denise Curto 1
Faustino Bonutti 2
Youssef Bouzekraoui 3
Farida Bentayeb 4
Hicham Asmi 4
1 Physics Department, University of Trieste, Italy
2 Academic Hospital of Udine, Medical Physics Department, Italy
3 Hassan First University of Settat, High Institute of Health Sciences, Laboratory of Sciences and Health Technologies, Settat, Morocco
4 Department of Physics, LPHE, Modeling and Simulations, Faculty of Science, Mohammed V University, Rabat, Morocco
10.22038/ijmp.2021.51256.1837
Abstract
Introduction: In Yttrium-90 SPECT imaging, the energy window and collimator used during projection acquisition can significantly affect image quality. In this work, we used a new and independent method to verify previous results, which suggest suitable energy around 130 keV.
Material and Methods: We used Siemens Symbia SPECT-CT system fitted with High Energy General Purpose (HEGP), Medium Energy General Purpose (MEGP), and Low Energy High Resolution (LEHR) to acquire data from NEMA IEC PET Body Phantom filled with 90Y chloride. ISO-counting curve is a new method analysed in this study to evaluate the adequate parameters for 90Y SPECT imaging.
Results: HEGP collimator was the most suitable for acquisitions of 90Y bremsstrahlung radiation from the point of view of the correct volume reproduction. ISO-counting analyses have shown that for the bigger phantom spheres, the optimum acquisition energy is centered on 130 keV.
Conclusion: The ISO-counting curve method is consistent to previous studies’ results and can help to improve image quality.
Keywords
Bremsstrahlung Yttrium
90 NEMA IEC PET Body Phantom ISO
Counting Curves
Subjects
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Iranian Journal of Medical Physics
Volume 19, Issue 1
January and February 2022
Pages 43-48

  • Receive Date 15 August 2020
  • Revise Date 19 January 2021
  • Accept Date 14 February 2021