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REVERSE DATA RECONSTRUCTION FOR OPTIMAL TIME SAMPLING OF COUNTS IN PHYSIOLOGICAL LIST-MODE NUCLEAR IMAGING

机译:生理列表模式核成像中计数的最佳时间采样的反向数据重建

摘要

A diagnostic imaging device includes detector elements (16) for detecting y-rays indicative of nuclear decay events. Pairs of concurrently detected γ-rays define lines of response (LORs) which are collected, time stamped, and compiled in list-mode. In tissue perfusion studies, it is beneficial to use the data that concurrently maximizes contrast and signal-to-noise ratio in the reconstructed images. Using the list-mode data, events in an adjustable temporal window (33) are reconstructed and the reconstructed images are analyzed to determine a figure of merit based on contrast and signal-to-noise properties of the image. By iteratively adjusting the temporal window, extending its start point (36) backwards in time, and repeating the reconstructing, analyzing, and adjusting steps, an image with an optimal figure of merit is obtained.
机译:一种诊断成像设备,包括用于检测指示核衰变事件的y射线的检测器元件( 16 )。成对的并发检测到的γ射线对定义了响应线(LOR),这些响应线以列表模式进行收集,标记时间戳和编译。在组织灌注研究中,使用在重建图像中同时最大化对比度和信噪比的数据是有益的。使用列表模式数据,可重构时间窗( 33 )中的事件被重建,并基于图像的对比度和信噪比特性对重建的图像进行分析以确定品质因数。通过迭代调整时间窗口,将其起点( 36 )在时间上向后扩展,并重复进行重构,分析和调整步骤,即可获得具有最佳品质因数的图像。

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