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Simulation Study for Designing a Dedicated Cardiac TOF-PET System

机译:专用心脏TOF-PET系统设计的仿真研究

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摘要

The development of dedicated positron emission tomography scanners is an active area of research, especially aiming at the improvement of lesion detection and in support of cancer treatment and management. Recently, dedicated Positron Emission Tomography (PET) systems with different configurations for specific organs have been developed for improving detection effectiveness. Open geometries are always subject to distortion and artifacts in the reconstructed images. Therefore, the aim of this work is to determine the optimal geometry for a novel cardiac PET system that will be developed by our team, and determine the time resolution needed to achieve reasonable image quality for the chosen geometry. The proposed geometries consist of 36 modules. These modules are arranged in two sets of two plates, each one with different configurations. We performed Monte Carlo simulations with different TOF resolutions, in order to test the image quality improvement in each case. Our results show, as expected, that increasing TOF resolution reduces distortion and artifact effects. We can conclude that a TOF resolution of the order of 200 ps is needed to reduce the artifacts, to acceptable levels, generated in the simulated cardiac-PET open geometries.
机译:专用正电子发射断层扫描仪的开发是一个活跃的研究领域,特别是旨在改善病变检测并支持癌症治疗和管理。近来,已经开发出具有针对特定器官的不同配置的专用正电子发射断层摄影(PET)系统,以提高检测效率。开放几何总是在重构图像中容易变形和失真。因此,这项工作的目的是为我们的团队开发的新型心脏PET系统确定最佳几何形状,并确定为所选几何形状实现合理图像质量所需的时间分辨率。拟议的几何结构由36个模块组成。这些模块分为两组,每组两个板,每个板具有不同的配置。为了测试每种情况下图像质量的改善,我们使用不同的TOF分辨率进行了蒙特卡洛模拟。我们的结果表明,正如预期的那样,提高TOF分辨率可减少失真和伪影效应。我们可以得出结论,需要大约200 ps的TOF分辨率,以将在人工心脏PET开放几何结构中产生的伪影降低到可接受的水平。

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