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CC BY-NC-ND 4.0 · Indian J Radiol Imaging 2019; 29(03): 299-304
DOI: 10.4103/ijri.IJRI_211_18
Miscellaenous

Artifacts in cranial MRI caused by extracranial foreign bodies and analysis of these foreign bodies

Selim Kayaci
Departments of Neurosurgery, Faculty of Medicine, Erzincan University, Erzincan
,
Ahmet Tabak
Department of Radiology, Dışkapı Training and Research Hospital, Ankara, Turkey
,
Irmak Durur-Subasi
Department of Chemistry, Faculty of Arts and Sciences, Sinop University
,
Tugba Eldes
Departments of Radiology, Faculty of Medicine, Recep Tayyip Erdogan University
,
Vaner Koksal
Departments of Neurosurgery, Faculty of Medicine, Recep Tayyip Erdogan University
,
Murat Sirin
Department of Physics, Faculty of Arts and Sciences, Recep Tayyip Erdogan University, Rize
,
Yusuf Kemal Arslan
Departments of Biostatistics, Faculty of Medicine, Erzincan University, Erzincan
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Abstract

Purpose: The purpose of our study was to conduct a chemical analysis of extracranial foreign bodies (FBs) causing artifacts in cranial magnetic resonance imaging (MRI) and to investigate the association between chemical composition, magnetic susceptibility, and artifact size. Materials and Methods: A total of 12 patients were included in the study. The FBs responsible for the artifacts were visualized using cranial computed tomography (CT). Artifact-causing FBs were removed from the scalps of 10 patients and analyzed using scanning electron microscope with energy dispersive spectroscopy (SEM-EDS), X-ray diffraction spectroscopy (X-RD), and Fourier-transform infrared spectroscopy (FT-IR). The magnetic susceptibility of the samples was determined using the reference standard material MnCl2.6H2O. The volume of the MRI artifacts was measured in cubic centimeters (cm3). Results: EDS results demonstrated that the mean Fe ratio was 5.82% in the stone samples and 0.08% in the glass samples. Although no phase peaks were detected in the X-RD spectra of the glass samples, peaks of Fe2O3, Al2Ca (SiO4) were detected in the X-RD spectra of the stone samples. The FT-IR spectra revealed metal oxide peaks corresponding to Fe, Al, in the stone samples and peaks confirming Al2SiO5and Na2SiO3structures in the glass samples. The mean volumes of the MRI artifacts produced by the stone and glass samples were 5.9 cm3 and 2.5 cm3, respectively. Conclusions: Artifacts caused by extracranial FBs containing metal/metal oxide components are directly associated with their chemical composition and the artifact size are also related to element composition and magnetic susceptibility.

Keywords

Artifact - glass - magnetism - magnetic resonance imaging - stone


Publication History

Received: 22 May 2018

Accepted: 03 September 2019

Article published online:
22 July 2021

© 2019. Indian Radiological Association. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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