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| Application of O-MAR technique in postoperative CTA of intracranial aneurysms embolization |
| GAO Si-zhe, DING Chang-wei, GUO Wen-li, HONG Yang |
| Shengjing Hospital of China Medical University, Shenyang 110004, China |
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Abstract Objective: To evaluate the clinical value of O-MAR technique in postoperative CTA of intracranial aneurysms embolization. Methods: Twenty-five patients with postoperative CTA of intracranial aneurysm after embolization were collected. The raw data were reconstructed by FBP(group A) and FBP+O-MAR(group B) respectively. Mann-Whitney U test was used for comparisons of the effects of the metal artifacts reduction. t-test or Mann-Whitney U test was used for comparisons of objective evaluating indices(length of artifacts, CT value and image noise). Results: The subjective scores of group B were significant higher than group A(U=0.00, P＜0.01). There were significant differences between group B and group A in the length of artifacts((15.4±3.2) mm and (38.8±7.1) mm, t=7.73, P＜0.01）, CT value(t=2.99, P＜0.05) and image noise((35.1±12.5) HU and (137.5±58.3) HU, t=5.31, P＜0.01). Conclusion: O-MAR technique can reduce the metal artifacts effectively, correct CT values around the plants and improve the image quality.
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Received: 20 October 2016
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[1]马骏，刘宏毅，常义，等. 破裂脑动脉瘤的早期治疗—血管内介入与内窥镜辅助下瘤颈夹闭[J]． 临床神经外科杂志，2007，4（3）：105-107.
[2]Tomandl BF, Hammen T, Klotz E, et al. Bone-subtraction CT angiography for the evaluation of intracranial aneurysms[J]． Am J Neuroradiol, 2006, 27(1): 55-59.
[3]Hang Y, Zhang L, Zhu XＲ, et al. Reducing metal artifacts in conbeam CT images by preprocessing projection data[J]. Int J Radiat Oncol Biol Phys, 2007, 67(3): 924-932.
[4]卢小健，张鸿祺，张鹏，等. 弹簧圈栓塞颅内动脉瘤的远期MRA随访研究[J]. 南京医科大学学报：自然科学版，2010，30（2）：206-210.
[5]Piotin M, Spelle L, Mounayer C, et al． Intracranial aneurysms: treatment with bare platinum coils-aneurysm packing, complex coils, and angiographic recurrence[J]． Radiology, 2007, 243(2): 500-508.
[6]郭建新，冒平，牛刚，等. 3D-CTA、2D-DSA及3D-DSA对颅内动脉瘤诊断价值的对比研究[J]. 中国CT和MRI杂志，2011，9（5）：21-23.
[7]Lin XZ, Miao F, Li JY, et al． High-definition CT Gemstone spectral imaging of the brain: initial results of selecting optimal monochromatic image for beam-hardening artifacts and image noise reduction[J]． J Comput Assist Tomogr, 2011, 35(2): 294-297.
[8]Primak AN, Giraldo JC, Eusemann CD, et al. Dual-source dual-energy CT with additional tin filtration: Dose and image quality evaluation in phantoms and in vivo[J]. Am J Roentgenol, 2010, 195(5): 1164-1174.
[9]Hilgers G, Nuver T, Minken A. The CT number accuracy of a novel commercial metal artifact reduction algorithm for large orthopedic implants[J]. J Appl Clin Med Phys, 2014, 15(1): 4597.
[10]Li H, Noel C, Chen H, et al. Clinical evaluation of a commercial orthopedic metal artifact reduction tool for CT simulations in radiation therapy[J]. Med Phys, 2012, 39(12): 7507-7517. |
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