Correlation analysis and research of CT artifacts of columnar metal phantom

doi:10.3877/cma.j.issn.2095-2015.2018.03.004

Abstract

Abstract:

Objective

To investigate the effects of metal artifact artifacts on the CT values of surrounding pixels are investigated by scanning different diameter columnarcylindrical metal modules and comparing them with empty scanning images.

Methods

The same scanning of different diameter columnar metal modules were scanned in the same condition, and compared with empty scanning images.The range of pixel was mould body, and empty scan images were determined.on the range of pixels, a single pixel CT pixel unit of measurement, measurement of The pixel CT values of two kinds of phantom images corresponding to the study area were measured by single pixel measurement unit, and compared with value and air scan form pixelthe CT values of empty scanning images data control, analysis t. The changing characteristicses of CT values were analyzed.

Results

Through the comparison of different diameter metal module scanning and emptyair scanning, the columnarcylindrical metal mold has had a definite influence on the CT value of the surrounding pixels, resulting in the increase of the CT value of the surrounding pixels to different degrees comapred with empty scanning, and t. The influence degree of pixel CT value between different diameter modules wais different.The ring artifact was formed by beam hardening is formed by a circular artifact atin the columnar metal peripheryrim, and its pixel CT value wais significantly different from the change in the CT value of the adjacent pixels.

Conclusion

The influence of the metal module on the CT value of the surrounding pixel is positively related to the moduledie diameter, and is negatively related to the pixel and module distance.The beam hardening causes the CT value of the peripheral pixel of the metal module to be much lower than that of the neighboring pixel.

Key words: Metal artifact, Beam hardening artifact, CT value

Weiwei Li, Tao Lian, Jiliang Zhai. Correlation analysis and research of CT artifacts of columnar metal phantom[J]. Chinese Journal of Digestion and Medical Imageology(Electronic Edition), 2018, 08(03): 112-115.

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Figures/Tables 4

References 21

1	Veldkamp WJ, Joemai RM, van der Molen AJ, et al.Development and validation of segmentation and interpolation techniques in sinograms for metal artifact suppression in CT[J]. Med Phys, 2010, 37(2): 620-628.
2	钱根年，陈自谦，付丽媛，等．多层螺旋CT图像常见伪影的影响因素与解决方案[J]．中国医学装备, 2017, 14(05): 18-22.
3	Abu Anas EM, Lee SY, Hasan MK.Removal of ring artifacts in CT imaging through detection and correction of stripes in the sinogram.[J]. Phys Med Biol, 2010, 55(22): 6911-6930.
4	Low DA, White BM, Lee PP, etal.A novel CT acquisition and analysis technique for breathing motion modeling.[J]. Phys Med Biol, 2013, 58(11): L31-36.
5	孙鸿飞，高留刚，倪昕晔．计算机断层扫描图像金属伪影校正方法研究现状[J]．中国医学影像技术, 2017, 33(04)616-619.
6	Hsieh J..Computed tomography: principles, design, artifacts, and recent advances[M]. SPIE Press, 2009.
7	Yazdi M, Mohammadi M. Metal Artifact Reduction in Dental Computed Tomography Images Based on Sinogram Segmentation Using Curvelet Transform Followed by Hough Transform[J]. J Med Signals Sens, 2017, 7(3): 145-152.
8	刘思伟，董硕，白玫，等．CT图像金属伪影的处理方法[J]．中国医学装备, 2014, 11(11): 77-82.
9	Prell D, Kyriakou Y, Beister M, et al.A novel forward projection-based metal artifact reduction Method for flat-detector computed tomography[J]. Phys Med Biol, 2009, 54(21): 6575-6591.
10	Choi J, Kim KS, Kim MW, etal.Sparsity driven metal part reconstruction for artifact removal in dental CT[J]. J X-Ray Sci Technol, 2011, 19(4): 457-475.
11	郁斌，吕富荣，张黎，等．胸部CT扫描中迭代去金属伪影算法减少金属伪影的有效性[J]．中国医学影像技术, 2017, 33(4): 590-593.
12	Liang X, Zhang Z, Niu T, et al.Iterative image-domain ring artifact removal in cone-beam CT[J]. Phys Med Biol, 2017, 62(13): 5276-5292.
13	Kalisz K, Buethe J, Saboo SS, et al.Artifacts at Cardiac CT: Physics and Solutions[J]. Radiographics, 2016, 36(7): 2064-2083.
14	Xie H, Tang X. Optimization of data acquisition in axial CT under the framework of sampling on lattice for suppression of aliasing artifacts with algorithmic detector interlacing[J]. Med Phys, 2017, 44(12): 6239-6250.
15	Groβe Hokamp N, Neuhaus V, Abdullayev N, et al.Reduction of artifacts caused by orthopedic hardware in the spine in spectral detector CT examinations using virtual monoenergetic image reconstructions and metal-artifact-reduction algorithms[J]. Skeletal Radiol, 2018, 47(2): 195-201.
16	何卫红，方向军，彭建春，等．螺旋CT图像常见伪影的分析和处理[J]．中南医学科学杂志, 2011, 39(6): 692-694.
17	程春，陈蕾，梁晓航，等．腰椎间盘突出MR工与CT诊断的应用的价值分析[J]．中国CT与MRI杂志, 2014, 12(7): 97-93.
18	杨震，杨树欣，高磊，等．CT图像伪影消除技术的研究[J]．中国医学装备, 2015, 12(2): 30-33.
19	Einstein AJ, Henzlova MJ, Rajagopalan S. Estimating risk of cancer associated with radiation exposure from 64-slice computed tomography coronary angiography.[J]. JAMA, 2007, 298(3): 317-323.
20	Silverman SG, Tuncali K, Adams DF, et al.CT fluoroscopy-guided abdominal interventions: techniques, results, and radiation exposure.[J]. Radiology, 1999, 212(3): 673-681.
21	陈豫．CT图像金属伪影校正算法研究[D]．合肥：中国科学技术大学，2009.

模体类型	金属柱状体外周数据	对应空扫数据	统计像素	差值	平均差值
粗金属模体	－195 805	－243 998	244	48 193	197.5
细金属模体	－238 547	－251 997	252	13 450	53.4

模体类型	金属柱状体外周数据	对应空扫数据	统计像素	差值	平均差值
粗金属模体	－195 805	－243 998	244	48 193	197.5
细金属模体	－238 547	－251 997	252	13 450	53.4

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