Budzik Grzegorz, Turek Paweł
Faculty of Mechanical Engineering & Aeronautics, Rzeszow University of Technology, Powstańców Warszawy Avenue 12, 35-959, Rzeszow, Poland.
Australas Phys Eng Sci Med. 2018 Sep;41(3):687-695. doi: 10.1007/s13246-018-0664-5. Epub 2018 Jul 5.
The article presents a comparative study of influence of the Lanczos resampling filter on improving the accuracy of reconstruction of mandible geometries. The research was performed on eight different patients. Digital Imaging and Communications in Medicine data were obtained on the Siemens Somatom Sensation Open 40 scanner. At the stage of reconstruction, the same parameters were utilized, while only slice thickness was changed. Modeling with voxel dimensions of 0.4 mm × 0.4 mm × 1.5 mm was chosen as the gold standard over the modeling approach comprising voxel dimensions of 0.4 mm × 0.4 mm × 3.0 mm and improved using the Lanczos resampling filter. The influence of the Lanczos resampling filter on the accuracy of reconstruction of mandible geometry is very similar for the eight presented patients. The average results show a distribution with a positive skew and kurtosis. The value of skewness is 0.713 and kurtosis is 4.221 for the model without Lanczos filtering applied. When the Lanczos filtering is applied the value of skewness is 0.542 and kurtosis is 4.313. Based on 95% confidence, changes in layer thickness from 1.5 mm to 3 mm generated errors reconstructing the geometry of the mandible at the value of 0.153 mm ± 1.209 mm. In models improved using the Lanczos resampling filter, the errors generated in reconstructing the geometry of the mandible were minimized at the value of 0.160 mm ± 1.007 mm. The presented research highlights new opportunities to improve the accuracy of reconstruction geometry of the mandible at the stage of data processing.
本文介绍了兰索斯重采样滤波器对提高下颌骨几何形状重建精度影响的对比研究。该研究对八名不同患者进行。医学数字成像和通信数据是在西门子Somatom Sensation Open 40扫描仪上获取的。在重建阶段，使用相同参数，仅改变切片厚度。与体素尺寸为0.4毫米×0.4毫米×3.0毫米并使用兰索斯重采样滤波器改进的建模方法相比，选择体素尺寸为0.4毫米×0.4毫米×1.5毫米的建模作为金标准。对于所呈现的八名患者，兰索斯重采样滤波器对下颌骨几何形状重建精度的影响非常相似。平均结果显示分布呈正偏态和峰态。对于未应用兰索斯滤波的模型，偏度值为0.713，峰度值为4.221。应用兰索斯滤波时，偏度值为0.542，峰度值为4.313。基于95%的置信度，层厚从1.5毫米变为3毫米时，重建下颌骨几何形状产生的误差为0.153毫米±1.209毫米。在使用兰索斯重采样滤波器改进的模型中，重建下颌骨几何形状产生的误差最小化，值为0.160毫米±1.007毫米。所呈现的研究突出了在数据处理阶段提高下颌骨重建几何形状精度的新机会。
