スギモト　コウヘイ   杉本　昂平    所属   川崎医療福祉大学  医療技術学部 診療放射線技術学科    職種   助教
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Quantitative evaluation of the reduction of distortion and metallic artifacts in magnetic resonance images using the multiacquisition variable‑resonance image combination selective sequence.
掲載誌名	正式名：Experimental and therapeutic medicine 略　 称：Exp Ther Med ISSNコード：17921015/17920981
掲載区分	国外
巻・号・頁	25(3),pp.109
著者・共著者	Masaki Hirano, Yuki Muto, Masahiro Kuroda, Yuta Fujiwara, Tomoaki Sasaki, Kazuhiro Kuroda, Ryo Kamizaki, Satoshi Imajoh, Yoshinori Tanabe, Wlla E Al-Hammad, Yuki Nakamitsu, Yudai Shimizu, Kohei Sugimoto, Masataka Oita, Irfan Sugianto, Babatunde O Bamgbose
発行年月	2023/03
概要	Magnetic resonance imaging (MRI) is superior to computed tomography (CT) in determining changes in tissue structure, such as those observed following inflammation and infection. However, when metal implants or other metal objects are present, MRI exhibits more distortion and artifacts compared with CT, which hinders the accurate measurement of the implants. A limited number of reports have examined whether the novel MRI sequence, multiacquisition variable-resonance image combination selective (MAVRIC SL), can accurately measure metal implants without distortion. Therefore, the present study aimed to demonstrate whether MAVRIC SL could accurately measure metal implants without distortion and whether the area around the metal implants could be well delineated without artifacts. An agar phantom containing a titanium alloy lumbar implant was used for the present study and was imaged using a 3.0 T MRI machine. A total of three imaging sequences, namely MAVRIC SL, CUBE and magnetic image compilation (MAGiC), were applied and the results were compared. Distortion was evaluated by measuring the screw diameter and distance between the screws multiple times in the phase and frequency directions by two different investigators. The artifact region around the implant was examined using a quantitative method following standardization of the phantom signal values. It was revealed that MAVRIC SL was a superior sequence compared with CUBE and MAGiC, as there was significantly less distortion, a lack of bias between the two different investigators and significantly reduced artifact regions. These results suggested the possibility of utilizing MAVRIC SL for follow-up to observe metal implant insertions.
DOI	10.3892/etm.2023.11808
PMID	36793326