METHOD FOR ATTENUATION CORRECTION IN RADIONUCLIDE COMPUTED TOMOGRAPHY
METHOD FOR ATTENUATION CORRECTION IN RADIONUCLIDE COMPUTED TOMOGRAPHY
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DOI：
10.1109/tns.1978.4329385
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发表时间：
1978-01-01
影响因子：
1.8
通讯作者：
CHANG, LT
中科院分区：
文献类型：
--
作者：
CHANG, LT
放射性核素计算机断层扫描（RCT）算法的发展是复杂的存在衰减的伽玛射线体内。一些现有的RCT重建算法将近似公式应用于投影数据以进行衰减校正，而另一些算法通过一些迭代过程将衰减考虑在内。这些算法的缺点是，常用的近似公式通常是不够的，迭代过程通常是非常耗时的。我们提出的RCT中的衰减校正方法对未校正的图像采用了简单有效的两步程序。在该过程中，滤波反投影算法被用于其快速的速度。本文给出了一个简单的数学基础和描述的过程，以及一些说明性的计算机结果。
The development of algorithms for Radionuclide Computed Tomography (RCT) is complicated by the presence of attenuation of gamma-rays inside the body. Some of the existing RCT reconstruction algorithms apply approximation formulas to the projection data for attenuation correction, while others take attenuation into account through some iterative procedures. The drawbacks of these algorithms are that the approximation formulas commonly used are generally inadequate and the iterative procedures are usually very time-consuming. The method for attenuation correction in RCT, which we propose, applied a simple, effective two-step procedure to the uncorrected image. In this procedure the filtered back-projection algorithm is used for its fast speed. A simple mathematical basis and description of the procedure together with some illustrative computer results are given in this paper.