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A New 3-D Double Window Adaptive Hybrid Smoothing Algorithm and Its Applications to Radionuclide Images

机译:一种新的3-D双窗口自适应混合平滑算法及其在放射性核素图像中的应用

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摘要

In contrast with most static studies in nuclear medicine, dynamic studies have an inherently high noise level because of low count statistics. Preprocessing of the raw image data by the application of suitably designed smoothing filters, provides a significant contri- bution to the dynamic studies. Because dynamic studies are 3-D, consisting of two spatial dimensions and time, preprocessing of the raw image data by a specially tailored 3-D filter, would be expected to fit more precisely and efficiently than the utilization of conven- tional 2-D filters. In this study a new 3-D Double Window Adaptive Hybrid Smoothing Algorithm (3-D DWAH filter) is introduced and the results obtained by its application on the pixel basis dynamic renal scintigraphic images are compared with those of the conventional filters and unsmoothed raw data. The 3-D DWAH filter effectively and optimally combines the FIR-Median Hybrid (FMH) and the running mean filters within a variably tuned interval providing a significant improvement in SNR without unacceptable degradation of spatial and temporal resolution.
机译:与核医学中的大多数静态研究相比,动态研究由于统计数量少而具有固有的高噪声水平。通过使用适当设计的平滑滤波器对原始图像数据进行预处理,为动态研究提供了重要的帮助。因为动态研究是3-D,包括两个空间维度和时间,所以通过特殊定制的3-D过滤器对原始图像数据进行预处理比使用常规2-D可以更准确,更有效地进行拟合。过滤器。在这项研究中,介绍了一种新的3-D双窗口自适应混合平滑算法(3-DWAWA滤镜),并将其在像素动态肾脏闪烁图像上的应用结果与常规滤镜和未平滑的原始数据进行了比较。 。 3-DWAWA滤波器在可变调谐间隔内有效且最佳地组合了FIR中值混合(FMH)和运行均值滤波器,可显着提高SNR,而不会出现不可接受的时空分辨率下降。

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