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Development of a Cost-Effective Modular Pixelated NaI(Tl) Detector for Clinical SPECT Applications

机译:临床应用spECT具有成本效益的模块化像素化碘化钠检测仪的研制

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摘要

A new pixelated detector for high-resolution clinical SPECT applications was designed and tested. The modular detector is based on a scintillator block comprised of 2.75×2.75×10 mm3 NaI(Tl) pixels and decoded by an array of 51 mm diameter single-anode PMTs. Several configurations, utilizing two types of PMTs, were evaluated using a collimated beam source to measure positioning accuracy directly. Good pixel separation was observed, with correct pixel identification ranging from 60 to 72% averaged over the entire area of the modules, depending on the PMT type and configuration. This translates to a significant improvement in positioning accuracy compared to continuous slab detectors of the same thickness, along with effective reduction of “dead” space at the edges. The observed 10% average energy resolution compares well to continuous slab detectors. The combined performance demonstrates the suitability of pixelated detectors decoded with a relatively small number of medium-sized PMTs as a cost-effective approach for high resolution clinical SPECT applications, in particular those involving curved detector geometries.
机译:设计并测试了一种用于高分辨率临床SPECT应用的新型像素化检测器。模块化检测器基于闪烁体块,该闪烁体块由2.75×2.75×10 mm 3 NaI(Tl)像素组成,并由51毫米直径的单阳极PMT阵列解码。利用准直光束源评估了利用两种PMT的几种配置,以直接测量定位精度。观察到良好的像素分离,根据PMT类型和配置,正确的像素识别率在整个模块区域平均范围为60%到72%。与相同厚度的连续平板检测器相比,这可以显着提高定位精度,并且可以有效减少边缘处的“死角”空间。观察到的10%的平均能量分辨率与连续平板探测器相比非常好。综合性能证明,用像素数量较少的中型PMT解码的像素化探测器适合作为高分辨率临床SPECT应用(尤其是涉及弯曲探测器几何形状的探测器)的一种经济有效的方法。

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  • 期刊名称 other
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  • 年(卷),期 -1(59),5
  • 年度 -1
  • 页码 1831–1840
  • 总页数 33
  • 原文格式 PDF
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