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首页> 外文期刊>IEEE Transactions on Medical Imaging >A practical method for position-dependent Compton-scatter correction in single photon emission CT
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A practical method for position-dependent Compton-scatter correction in single photon emission CT

机译：单光子发射CT中依赖位置的康普顿散射校正的实用方法

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摘要

A new method is proposed to subtract the count of scattered photons from that acquired with a photopeak window at each pixel in each planar image of single-photon emission computed tomography (SPECT). The subtraction is carried out using two sets of data: one set is acquired with a main window centered at photopeak energy and the other is acquired with two subwindows on both sides of the main window. The scattered photons included in the main window are estimated from the counts acquired with the subwindows and then they are subtracted from the count acquired with the main windows. Since the subtraction is performed at each pixel in each planar image, the proposed method has the potential to be more precise than conventional methods. For three different activity distributions in cylinder phantoms, simulation tests gave good agreement between the activity distributions reconstructed from unscattered photons and those from the corrected data.
机译：提出了一种新方法，该方法从单光子发射计算机断层扫描（SPECT）的每个平面图像中每个像素的光峰窗口获取的光子计数中减去计数。减法是使用两组数据进行的：一组是通过以光峰值能量为中心的主窗口获取的，另一组是通过在主窗口两侧的两个子窗口获取的。从子窗口获取的计数中估算主窗口中包含的散射光子，然后从主窗口获取的计数中减去它们。由于在每个平面图像中的每个像素处执行相减，所以所提出的方法具有比常规方法更精确的潜力。对于圆柱体模型中的三种不同的活动分布，模拟测试给出了从未散射光子重建的活动分布与从校正数据重建的活动分布之间的良好一致性。

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