Abstract—

The use of a special device that limits the field of view of a detector, i.e., a confocal collimator, is one of the approaches to obtaining information about the spatial distribution of the detected material in the methods for radionuclide diagnostics (in medicine) and X-ray fluorescence analysis (in material science). This device is a monolithic construction with a large number of straight channels whose axes are directed towards a single point that is the focus of the confocal collimator. The possibility of fabricating confocal collimators using 3D printing technology is demonstrated. The advantages of 3D printing are simplicity, reliability, and wide availability. It is shown that the use of a confocal collimator in radionuclide diagnostics instead of a single-channel collimator is advantageous, since it substantially increases the sensitivity (by 2−7 times) with the simultaneous improvement of the resolution (approximately by 9 times). The applicability of the confocal collimator for determining the depth of occurrence of a radiation source, i.e., for measuring the three-dimensional distribution of the emitting (fluorescent) substance, is also demonstrated.

中文翻译：

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用于放射性核素诊断和X射线荧光分析的共聚焦准直仪

摘要-

使用限制检测器（即共聚焦准直仪）视场的特殊设备是在放射性核素诊断（医学）和X射线成像方法中获取有关被检测物质空间分布信息的方法之一。射线荧光分析（材料科学中）。该设备是具有大量直通道的整体结构，其通道的轴线指向共聚焦准直仪的焦点所在的单个点。演示了使用3D打印技术制造共聚焦准直器的可能性。3D打印的优势在于简单，可靠和广泛的可用性。结果表明，在放射性核素诊断中使用共聚焦准直仪代替单通道准直仪是有利的，因为它可以显着提高灵敏度（提高2到7倍），同时提高分辨率（大约提高9倍）。还证明了共聚焦准直仪用于确定辐射源的出现深度，即用于测量发射（荧光）物质的三维分布的适用性。