Reduction of metal artifacts from knee tumor prostheses on CT images: value of the single energy metal artifact reduction (SEMAR) algorithm

Abstract Background To evaluate the effect of the single energy metal artifact reduction (SEMAR) algorithm with a multidetector CT (MDCT) for knee tumor prostheses. Methods First, a phantom of knee tumor prosthesis underwent a MDCT scan. The raw data was reconstructed by iterative reconstruction (IR...

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Autores principales:	Fang-ling Zhang, Ruo-cheng Li, Xiao-ling Zhang, Zhao-hui Zhang, Ling Ma, Lei Ding
Formato:	article
Lenguaje:	EN
Publicado:	BMC 2021
Materias:	Metal artifact reduction Tumor prosthesis Knee Computed tomography Image quality Neoplasms. Tumors. Oncology. Including cancer and carcinogens RC254-282
Acceso en línea:	https://doaj.org/article/2d48230aad5c43d5b8683f537f05c62d
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spelling	oai:doaj.org-article:2d48230aad5c43d5b8683f537f05c62d2021-12-05T12:19:33ZReduction of metal artifacts from knee tumor prostheses on CT images: value of the single energy metal artifact reduction (SEMAR) algorithm10.1186/s12885-021-09029-31471-2407https://doaj.org/article/2d48230aad5c43d5b8683f537f05c62d2021-12-01T00:00:00Zhttps://doi.org/10.1186/s12885-021-09029-3https://doaj.org/toc/1471-2407Abstract Background To evaluate the effect of the single energy metal artifact reduction (SEMAR) algorithm with a multidetector CT (MDCT) for knee tumor prostheses. Methods First, a phantom of knee tumor prosthesis underwent a MDCT scan. The raw data was reconstructed by iterative reconstruction (IR) alone and IR plus SEMAR. The mean value of the CT number and the image noise were measured around the prosthesis at the stem level and articular level. Second, 95 consecutive patients with knee tumor prostheses underwent MDCT scans. The raw data were also reconstructed by the two methods. Periprosthetic structures were selected at the similar two levels. Four radiologists visually graded the image quality on a scale from 0 to 5. Additionally, the readers also assessed the presence of prosthetic complication and tumor recurrence on a same scale. Results In the phantom, when the SEMAR was used, the CT numbers were closer to normal value and the noise of images using soft and sharper kernel were respectively reduced by up to 77.1% and 43.4% at the stem level, and by up to 82.2% and 64.5% at the articular level. The subjective scores increased 1 ~ 3 points and 1 ~ 4 points at the two levels, respectively. Prosthetic complications and tumor recurrence were diagnosed in 66 patients. And the SEMAR increased the diagnostic confidence of prosthetic complications and tumor recurrence (4 ~ 5 vs. 1 ~ 1.5). Conclusions The SEMAR algorithm can significantly reduce the metal artifacts and increase diagnostic confidence of prosthetic complications and tumor recurrence in patients with knee tumor prostheses.Fang-ling ZhangRuo-cheng LiXiao-ling ZhangZhao-hui ZhangLing MaLei DingBMCarticleMetal artifact reductionTumor prosthesisKneeComputed tomographyImage qualityNeoplasms. Tumors. Oncology. Including cancer and carcinogensRC254-282ENBMC Cancer, Vol 21, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Metal artifact reduction Tumor prosthesis Knee Computed tomography Image quality Neoplasms. Tumors. Oncology. Including cancer and carcinogens RC254-282
spellingShingle	Metal artifact reduction Tumor prosthesis Knee Computed tomography Image quality Neoplasms. Tumors. Oncology. Including cancer and carcinogens RC254-282 Fang-ling Zhang Ruo-cheng Li Xiao-ling Zhang Zhao-hui Zhang Ling Ma Lei Ding Reduction of metal artifacts from knee tumor prostheses on CT images: value of the single energy metal artifact reduction (SEMAR) algorithm
description	Abstract Background To evaluate the effect of the single energy metal artifact reduction (SEMAR) algorithm with a multidetector CT (MDCT) for knee tumor prostheses. Methods First, a phantom of knee tumor prosthesis underwent a MDCT scan. The raw data was reconstructed by iterative reconstruction (IR) alone and IR plus SEMAR. The mean value of the CT number and the image noise were measured around the prosthesis at the stem level and articular level. Second, 95 consecutive patients with knee tumor prostheses underwent MDCT scans. The raw data were also reconstructed by the two methods. Periprosthetic structures were selected at the similar two levels. Four radiologists visually graded the image quality on a scale from 0 to 5. Additionally, the readers also assessed the presence of prosthetic complication and tumor recurrence on a same scale. Results In the phantom, when the SEMAR was used, the CT numbers were closer to normal value and the noise of images using soft and sharper kernel were respectively reduced by up to 77.1% and 43.4% at the stem level, and by up to 82.2% and 64.5% at the articular level. The subjective scores increased 1 ~ 3 points and 1 ~ 4 points at the two levels, respectively. Prosthetic complications and tumor recurrence were diagnosed in 66 patients. And the SEMAR increased the diagnostic confidence of prosthetic complications and tumor recurrence (4 ~ 5 vs. 1 ~ 1.5). Conclusions The SEMAR algorithm can significantly reduce the metal artifacts and increase diagnostic confidence of prosthetic complications and tumor recurrence in patients with knee tumor prostheses.
format	article
author	Fang-ling Zhang Ruo-cheng Li Xiao-ling Zhang Zhao-hui Zhang Ling Ma Lei Ding
author_facet	Fang-ling Zhang Ruo-cheng Li Xiao-ling Zhang Zhao-hui Zhang Ling Ma Lei Ding
author_sort	Fang-ling Zhang
title	Reduction of metal artifacts from knee tumor prostheses on CT images: value of the single energy metal artifact reduction (SEMAR) algorithm
title_short	Reduction of metal artifacts from knee tumor prostheses on CT images: value of the single energy metal artifact reduction (SEMAR) algorithm
title_full	Reduction of metal artifacts from knee tumor prostheses on CT images: value of the single energy metal artifact reduction (SEMAR) algorithm
title_fullStr	Reduction of metal artifacts from knee tumor prostheses on CT images: value of the single energy metal artifact reduction (SEMAR) algorithm
title_full_unstemmed	Reduction of metal artifacts from knee tumor prostheses on CT images: value of the single energy metal artifact reduction (SEMAR) algorithm
title_sort	reduction of metal artifacts from knee tumor prostheses on ct images: value of the single energy metal artifact reduction (semar) algorithm
publisher	BMC
publishDate	2021
url	https://doaj.org/article/2d48230aad5c43d5b8683f537f05c62d
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Reduction of metal artifacts from knee tumor prostheses on CT images: value of the single energy metal artifact reduction (SEMAR) algorithm

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