Analysing the effects of metallic biomaterial design and imaging sequences on MRI interpretation challenges due to image artefacts

Gulsen Akdogan; Omer Burak Istanbullu

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Analysing the effects of metallic biomaterial design and imaging sequences on MRI interpretation challenges due to image artefacts

机译：分析金属生物材料设计和成像序列对图像伪影导致的 MRI 解释挑战的影响

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Biometals cause signal loss and susceptibility artefacts in the surrounding tissue, resulting in deterioration in magneticresonance (MR) images. This metal-artefact effect may lead to interpretation challenges for MR images. Therefore, artefactreduction is required to obtain higher-quality images. This paper aims to analyse the impact of imaging sequence and metallicbiomaterial design on MR image artefacts. In this respect, implant specimens were designed in thin, thick, and pointedforms and manufactured using 316LVM, 316L, CoCr-alloy, and Ti-alloy, which are commonly utilized materials in thebiomaterials field. Specimens were placed in a phantom that simulates average human anatomy separately and scanned in a1.5 T MRI under four imaging conditions: “Axial-T1-Gradient-Echo (GRE)”, “Sagittal-T1-GRE”, “Axial-T2-Spin-Echo (SE)”and “Sagittal-T2-SE”. Images were analysed regarding image artefact amount. The lower magnetic susceptibility of Ti-alloyspecimens caused 84.76% less deterioration than 316LVM specimens in the MR images with the mean image artefactto-specimen size ratio. Thinner implant designs provided better performance regarding the metal artefact by reducing theartefact-to-specimen size ratio. T_2SEdecreased the image artefact by 44.7% for 316LVM and 54.6% for Ti-Alloy specimensand provided better image quality than T_1GREfor clinical interpretation. This study reveals that image artefacts directlydepend on material content, implant volume, geometry, and imaging sequence selection. The minor artefact effect of T_2SEprovides more accurate MR images than T1GREregarding the interpretation of the images of the patients with biometals.The higher magnetic susceptibility of biometals causes more deterioration of the images.

机译：Biometals导致信号丢失和易感性文物在周围组织,导致恶化磁这可能导致metal-artefact作用先生解释挑战图像。因此,人工制品获得高质量的图像。分析成像序列和所带来的影响金属文物。被设计在薄,厚,指出和制造使用316 lvm, 316 l, CoCr-alloy,钛合金,通常利用材料的被放置在一个模拟平均的幻影人体解剖学和扫描MRI在四个成像条件下:“Axial-T1-Gradient-Echo (GRE)”,“Sagittal-T1-GRE”、“Axial-T2-Spin-Echo (SE)”“Sagittal-T2-SE”。图像的人工制品。易感性的钛合金比316少84.76%恶化lvm标本MR图像的均值图像artefactto -设计提供更好的性能有关金属产物减少的T_2SE316个lvm和钛合金标本为54.6%提供比T_1GRE更好的图像质量临床解释。直接形象的文物内容,植入物体积、几何和成像序列的选择。T_2SET1GREbiometals患者。biometals引起更多的磁化率恶化的图像。

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《Physical and Engineering Sciences in Medicine》 |2022年第4期|1163-1174|共12页
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Gulsen Akdogan; Omer Burak Istanbullu;
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Department of Biomedical Engineering, Facultyof Engineering, Erciyes University, Kayseri, Turkey;

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机译：喷雾样品的数字图像分析系统（Un systeme D'analyseD'Image pour L'analyze D'Echantillons D'arrosage）

Analysing the effects of metallic biomaterial design and imaging sequences on MRI interpretation challenges due to image artefacts

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