轫致辐射Y90 SPECT-CT成像的能量窗优化:一项幻象研究

Q3 Health Professions

Iranian Journal of Medical Physics Pub Date : 2021-02-14 DOI:10.22038/IJMP.2021.51256.1837

D. Curto, F. Bonutti, Youssef Bouzekraoui, Hicham Asmi, F. Bentayeb

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引用次数: 0

摘要

在钇-90 SPECT成像中，采集过程中使用的能量窗口和准直器会对图像质量产生重大影响。在这项工作中，我们使用了一种新的独立方法来验证先前的结果，这些结果提出了不同的能量范围，但都集中在130 keV。材料和方法:我们使用西门子Symbia SPECT-CT系统，配备高能通用(HEGP)，中能通用(MEGP)和低能高分辨率(LEHR)，获取NEMA IEC PET体体幻影的数据，其直径为3.7,2.8,2.2,1.7,1.3,1.0 cm的6种不同球体。结果:从正确的体积再现角度看，HEGP准直仪最适合采集90Y轫致辐射。对于较大球体的研究，最佳的iso计数曲线与以130 keV为中心的能量范围有关。结论:所得结果与前人研究结果一致。Iso计数曲线方法可以帮助提高图像质量。

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Energy window optimization for Bremsstrahlung Y90 SPECT-CT imaging : a phantom study

Introduction: In Yttrium-90 SPECT imaging, the energy window and collimator used during acquisition can have a major effect on image quality. In this work, we used a new and independent method to verify the prevoius results suggest different energy ranges, but all centered at 130 keV. Materials and method: 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 with its 6 different spheres of 3.7, 2.8, 2.2, 1.7, 1.3, 1.0 cm diameter. Results:HEGP collimator is the most suitable for acquisitions of 90Y bremsstrahlung radiation from the point of view of the correct volume reproduction. For the bigger sphere’s study, the optimum ISO-counting curves is related to the energy range centred in 130 keV.Conclusion: The results obtained are consistent with previous studies. The Iso Counting Curves method can help to improve image quality.

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来源期刊

Iranian Journal of Medical Physics Health Professions-Radiological and Ultrasound Technology

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

8 weeks

期刊介绍： Iranian Journal of Medical Physics (IJMP) is the official scientific bimonthly publication of the Iranian Association of Medical Physicists. IJMP is an international and multidisciplinary journal, peer review, free of charge publication and open access. This journal devoted to publish Original Papers, Review Articles, Short Communications, Technical Notes, Editorial and Letters to the Editor in the field of “Medical Physics” involving both basic and clinical research. Submissions of manuscript from all countries are welcome and will be reviewed by at least two expert reviewers.