Evaluation of the X-ray digital linear tomosynthesis reconstruction processing method for metal artifact reduction
Evaluation of the X-ray digital linear tomosynthesis reconstruction processing method for metal artifact reduction
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DOI：
10.1016/j.compmedimag.2009.01.004
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发表时间：
2009-06-01
影响因子：
5.7
通讯作者：
Umeda, Tokuo
中科院分区：
文献类型：
--
作者：
Gomi, Tsutomu;Hirano, Hiroshi;Umeda, Tokuo
我们评估了用于金属伪影还原的x射线数字线性断层合成重建处理方法。使用体积x射线数字线性断层成像仪对髋关节假体进行成像。由于断层合成成像通常采用较少的投影和狭窄的角度范围，在数字线性断层合成重建中观察到髋关节假体中高衰减特征引起的伪影。我们开发了基于改进的Shepp和Logan重构滤波器核的伪影减少方法，该方法通过考虑频域空间中直流分量的附加权重来实现。处理导致图像中低频分量的比例增加。该方法在增强假体的可见性方面的有效性是量化的去除重影伪影。伪影减少处理的潜力为数字线性断层合成评估髋关节假体被证明。改进的Shepp和Logan重构滤波器核减少了伪影，提高了受金属伪影影响的图像质量。未来的研究将研究数字线性断层合成的能力，以量化这些装置金属成分之间的空间关系，以及该技术识别具有诊断意义的骨变化的能力。2009爱思唯尔有限公司版权所有。
We evaluated the X-ray digital linear tomosynthesis reconstruction processing method for metal artifact reduction. A volumetric X-ray digital linear tomosynthesis instrument was used to image a hip prosthesis. Artifacts caused by high-attenuation features in hip prostheses were observed in digital linear tomosynthesis reconstruction due to the few projections and narrow angular range typically employed in tomosynthesis imaging. We developed artifact reduction methods based on a modified Shepp and Logan reconstruction filter kernel realized by taking into account additional weighing by direct current (DC) components in frequency domain space. Processing leads to an increase in the ratio of low-frequency components in an image. The effectiveness of the method in enhancing the visibility of a Prosthetic case was quantified in terms of removal of ghosting artifacts. The potential of artifact reduction processing for digital linear tomosynthesis in the evaluation of hip Prostheses was demonstrated. A modified Shepp and Logan reconstruction filter kernel causes artifact reduction and improved the quality of images affected by metal artifacts. Future investigations will study the ability of digital linear tomosynthesis to quantify the spatial relationship between the metallic components of these devices as well as the ability of the technique to identify bony changes of diagnostic significance. (C) 2009 Elsevier Ltd. All rights reserved.