基于准直器的双光子核素重合成像

Radioisotopes Pub Date : 2021-07-15 DOI:10.3769/RADIOISOTOPES.70.271

M. A. Choghadi, Mizuki Kitajima, M. Uenomachi, K. Shimazoe, H. Takahashi

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摘要

本文提出了一种新的基于方向敏感伽马相机的时间/位置相关型层析成像方法，该方法可以识别入射γ射线的方向。该方法利用两个γ射线光子之间的相关性，提供了高分辨率和高信噪比的体内放射性浓度。In被称为级联γ射线发射核素。除了11in外，我们还探索了新的候选核素，并发现了其他一些具有不同寿命的核素。设计了一种聚焦式铅色器，并将其与像素化探测器阵列耦合，用于这种新的符合成像方式。与单光子分析相比，该方法具有明显的背景抑制效果和提高的空间分辨率。

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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Collimator-based Coincidence Imaging for Double Photon Emitting Nuclides

We have proposed a new concept of time/position correlation type tomographic method based on a directionality-sensitive gamma camera, which can identify incident γ-ray direction. This method utilizes the correlation between two γ-ray photons and provides the radioactivity concentration in the body with a high resolution and a high signal-to-noise ratio. 111 In is known as a cascade γ-ray emitting nuclide. Besides 111 In, we have explored new candidates and found some other nuclides with diﬀerent lifetimes. A focused lead col limator was designed and coupled to a pixelated detector array for this new coincidence imaging modality. The method shows a signiﬁcant background rejection and an improved spatial resolution in comparison with the single-photon analysis.

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Radioisotopes

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