Metal Artifact Reduction Techniques for Single Energy CT and Dual-energy CT with Various Metal Materials

Overview

Journal BJR Open

Publisher Oxford University Press

Specialty Radiology

Date 2020 Nov 12

PMID 33178930

Citations 6

Authors

Daisuke Kawahara

Shuichi Ozawa

Kazushi Yokomachi

Toru Higaki

Takehiro Shiinoki

Akito Saito

Tomoki Kimura

Ikuno Nishibuchi

Ippei Takahashi

Yuuki Takeuchi

Nobuki Imano

Katsumaro Kubo

Masayoshi Mori

Yoshimi Ohno

Yuji Murakami

Yasushi Nagata

Affiliations

Soon will be listed here.

Abstract

Objective: The aim of the current study is to evaluate the effectiveness of reduction metal artifacts using kV-CT image with the single-energy based metal artefact reduction (SEMAR) technique by single-energy reconstruction, monochromatic CT and rED reconstructed by dual-energy reconstruction.

Methods: Seven different metal materials (brass, aluminum, copper, stainless, steel, lead and titanium) were placed inside the water-based PMMA phantom. After DECT-based scan, the artefact index (AI) were evaluated with the kV-CT images with and without SEMAR by single-energy reconstruction, and raw-data based electron density (rED), monochromatic CT images by dual-energy reconstruction. Moreover, the AI with evaluated with rED and the converted ED images from the kV-CT and monochromatic CT images.

Results: The minimum average value of the AI with all-metal inserts was approximately 80 keV. The AI without SEMAR was larger than that with SEMAR for the 80 kV and 135 kV CT images. In the comparison of the AI for the rED and ED images that were converted from 80 kV and 135 kV CT images with and without SEMAR, the monochromatic CT images of the PMMA phantom with inserted metal materials at 80 keV revealed that the kV-CT with SEMAR reduced the metal artefact substantially.

Conclusion: The converted ED from the kV-CT and monochromatic CT images could be useful for a comparison of the AI using the same contrast scale. The kV-CT image with SEMAR by single-energy reconstruction was found to substantially reduce metal artefact.

Advances In Knowledge: The effectiveness of reduction of metal artifacts using single-energy based metal artefact reduction (SEMAR) technique and dual-energy CT (DECT) was evaluated the electron density conversion techniques.

Citing Articles

Evaluation of the effect of reducing metal artifacts in multi-detector CT imaging of zirconia and titanium implants.

Suito H, Yoshihara H, Maeda N, Kasai R, Inoue T, Amano M Oral Radiol. 2025; .

PMID: 40038165 DOI: 10.1007/s11282-025-00814-5.

Reduction of metal artefacts from bilateral hip prostheses during lower extremity computed tomography angiography: an experimental phantom study.

Abdalqader O, Hjouj M, Aljamal M, Hjouj F, Abuzaid M, Mousa M J Med Radiat Sci. 2024; 71(3):421-431.

PMID: 38941235 PMC: 11569399. DOI: 10.1002/jmrs.797.

Dose uncertainty due to energy dependence in dual-energy computed tomography.

Kawahara D, Toyoda T, Yokomachi K, Fujioka C, Nagata Y Pol J Radiol. 2023; 88:e270-e274.

PMID: 37404547 PMC: 10317008. DOI: 10.5114/pjr.2023.128682.

Deep learning reconstruction with single-energy metal artifact reduction in pelvic computed tomography for patients with metal hip prostheses.

Hosoi R, Yasaka K, Mizuki M, Yamaguchi H, Miyo R, Hamada A Jpn J Radiol. 2023; 41(8):863-871.

PMID: 36862290 PMC: 10366278. DOI: 10.1007/s11604-023-01402-5.

Artificial Intelligence in Emergency Radiology: Where Are We Going?.

Cellina M, Ce M, Irmici G, Ascenti V, Caloro E, Bianchi L Diagnostics (Basel). 2022; 12(12).

PMID: 36553230 PMC: 9777804. DOI: 10.3390/diagnostics12123223.

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