| 模型试验研究SPECT滤波函数的最佳选择 |
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| 引用本文： | 陈盛祖.模型试验研究SPECT滤波函数的最佳选择[J].核电子学与探测技术,1998,18(5):336-337. |
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| 作者姓名： | 陈盛祖 |
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| 作者单位： | 中国医学科学院肿瘤研究所核医学科 |
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| 摘 要： | 目的：为了寻找临床应用中ＳＰＥＣＴ滤波函数的最佳选择，方法，我们用Ｊａｓｃｚａｋ模型进行了模拟试验，模拟的主要参数为信息量和空间分辨，信息量用高计数和低计数模拟，空间分辨改变滤波器函数种类和滤波参数模拟，共模拟８种条件，结果：８种条件中，低计数以Ｂｕｔｔｅｒｗｏｒｔｈ０．５截止频率为最佳，高计数时以Ｂｕｔｔｅｒｗｏｒｔｈ０．７截止频率为最佳，结论：临床ＳＰＥＣＴ滤波不能单用Ｒａｍｐ滤波函数Ｂｕｔｔ
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| 关 键 词： | SPECT 模型试验 滤波函数 放射性核素标记 |
Optimization of the Filter Selection in SPECT Based on Phantom Study |
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| Chen Shengzu.Optimization of the Filter Selection in SPECT Based on Phantom Study[J].Nuclear Electronics & Detection Technology,1998,18(5):336-337. |
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| Authors: | Chen Shengzu |
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| Abstract: | The aim of this study is to optimize selection of the filter functions in SPECT. The Jaszczak phantom was used for simulation study. The simulation parameters include information dencity and spatial resolution. 8 filtering conditions were simulated by changing counts rate and filter parameters. The results showed that Butterworth with cutoff frequency 0 5 is preferable in the low counts rate but 0 7 in the high counts rate. This study suggested that single Ramp filter can not be used in clinical study. Butterworth filter with moderate values of filter parameters is the first choice and then adjust slightly according to the dose and the size of the lesion. ( |
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| Keywords: | SPECT Phantom study Filter function) |
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