Combined application of single-energy metal artifact reduction and reconstruction techniques in patients with Cochlear i
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(2020) 49:65
ORIGINAL RESEARCH ARTICLE
Open Access
Combined application of single-energy metal artifact reduction and reconstruction techniques in patients with Cochlear implants Fanqin Wei1,2,3†, Jiahui Li1,2,3,4†, Chunxiang Zhou1,2,3, Yun Li1,2,3, Xianren Wang1,2,3, Bixue Huang1,2,3, Qiyang Sun1,2,3 and Guanxia Xiong1,2,3*
Abstract Background: The purpose of this study was to develop an effective method of reducing metal artifacts in cochlear implant (CI) electrodes. Methods: The temporal bones of 30 patients (34 ears) after CI were examined with 320-detector row computed tomography, which was evaluated by two senior radiologists using a double-blind method. Noise, artifact index, signal-to-noise ratio, and the subjective image quality score were compared before versus after using single-energy metal artifact reduction (SEMAR). The electrode position, single electrode visibility, and electrode count were evaluated using SEMAR combined with either multi-planar reconstruction (MPR) or maximum intensity projection. Results: The two radiologists’ measurements had good consistency. SEMAR significantly reduced the image noise and artifacts index and significantly improved the signal-to-noise ratio and subjective image quality score (P < 0.01). The combination of SEMAR with MPR was conducive to accurate assessment of electrode position and singleelectrode visibility. The combination of SEMAR with MIP facilitated accurate and intuitive matching of the assessed electrode count with the number of electrodes implanted during the operation (P = 0.062). Conclusion: SEMAR significantly reduces metal artifacts generated by CI electrodes and improves the quality of computed tomography images. The combination of SEMAR with MPR and maximum intensity projection is beneficial for evaluating the position and number of CI electrodes. Keywords: SEMAR; electrode, Image quality, Computed tomography
* Correspondence: [email protected] † Fanqin Wei and Jiahui Li contributed equally to this work. 1 Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital, Sun Yat-sen University, 2nd Zhongshan Road 58#, Guangzhou 510080, Guangdong, PR China 2 Institute of Otorhinolaryngology Head and Neck Surgery, Sun Yat-sen University, Guangzhou 510080, Guangdong, PR China Full list of author information is available at the end of the article © The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exc
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