On the Effect of the Patient Table on Attenuation in Myocardial Perfusion Imaging SPECT.

IF 3 2区医学 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING EJNMMI Physics Pub Date : 2025-01-20 DOI:10.1186/s40658-024-00713-4

Tamino Huxohl, Gopesh Patel, Wolfgang Burchert

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Abstract

Background: The topic of the effect of the patient table on attenuation in myocardial perfusion imaging (MPI) SPECT is gaining new relevance due to deep learning methods. Existing studies on this effect are old, rare and only consider phantom measurements, not patient studies. This study investigates the effect of the patient table on attenuation based on the difference between reconstructions of phantom scans and polar maps of patient studies.

Methods: Jaszczak phantom scans are acquired according to quality control and MPI procedures. An algorithm is developed to automatically remove the patient table from the CT for attenuation correction. The scans are then reconstructed with attenuation correction either with or without the patient table in the CT. The reconstructions are compared qualitatively and on the basis of their percentage difference. In addition, a small retrospective cohort of 15 patients is examined by comparing the resulting polar maps. Polar maps are compared qualitatively and based on the segment perfusion scores.

Results: The phantom reconstructions look qualitatively similar in both the quality control and MPI procedures. The percentage difference is highest in the lower part of the phantom, but it always remains below 17.5%. Polar maps from patient studies also look qualitatively similar. Furthermore, the segment scores are not significantly different (p=0.83).

Conclusions: The effect of the patient table on attenuation in MPI SPECT is negligible.

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病人表对心肌灌注显像SPECT衰减的影响。

背景：由于深度学习方法的发展，患者表对心肌灌注成像（MPI） SPECT衰减的影响这一主题正在获得新的相关性。现有的关于这种影响的研究都是陈旧的、罕见的，而且只考虑了虚幻的测量，而不是病人的研究。本研究基于幻影扫描重建与患者研究极坐标图之间的差异，探讨了患者表对衰减的影响。方法：根据质量控制和MPI程序获得Jaszczak幻像扫描。提出了一种从CT上自动移除患者表进行衰减校正的算法。然后通过衰减校正重建扫描结果，在CT中有或没有患者表。对重建结果进行定性比较，并根据它们的百分比差异进行比较。此外，一个小的回顾性队列的15名患者是通过比较所得的极地地图检查。根据节段灌注评分对极坐标图进行定性比较。结果：假体重建在质量控制和MPI过程中具有相似的质量。幻肢下部的百分比差异最大，但始终保持在17.5%以下。患者研究的极坐标图在质量上也很相似。此外，片段得分无显著差异（p=0.83）。结论：患者表对MPI SPECT衰减的影响可以忽略不计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

EJNMMI Physics Physics and Astronomy-Radiation

CiteScore

6.70

自引率

10.00%

发文量

审稿时长

13 weeks

期刊介绍： EJNMMI Physics is an international platform for scientists, users and adopters of nuclear medicine with a particular interest in physics matters. As a companion journal to the European Journal of Nuclear Medicine and Molecular Imaging, this journal has a multi-disciplinary approach and welcomes original materials and studies with a focus on applied physics and mathematics as well as imaging systems engineering and prototyping in nuclear medicine. This includes physics-driven approaches or algorithms supported by physics that foster early clinical adoption of nuclear medicine imaging and therapy.