RF-induced Heating Effects of Metallic Biomaterial Designs at 1.5T MRI Exposure

Akdoğan G., İstanbullu Ö. B.

INTERNATIONAL JOURNAL OF BIOMEDICAL ENGINEERING AND TECHNOLOGY, cilt.41, sa.4, ss.376-393, 2023 (ESCI)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 41 Sayı: 4
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1504/ijbet.2023.10056081
  • Dergi Adı: INTERNATIONAL JOURNAL OF BIOMEDICAL ENGINEERING AND TECHNOLOGY
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus, Aerospace Database, Biotechnology Research Abstracts, Communication Abstracts, Compendex, EMBASE, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.376-393
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

This study analyses the performance of implantable bio-metals in magnetic resonance imaging (MRI) conditions to ensure that patients with MRI-conditional implants are not precluded from MRI applications. 316L, 316LVM, Ti-alloy, and CoCrMo-alloy specimens in different geometries were placed in a phantom that imitates the thermal/electrical features of human anatomy. The phantom was scanned in a 1.5T-MRI using ‘axial-T1-gradient-echo’, ‘sagittal-T1-gradient-echo’, ‘axial-T2-spin-echo’ and ‘sagittal-T2-spin-echo’ imaging sequences. The specimens were examined regarding radiofrequency (RF) induced heating using a 2-channel-fiber-optical- temperature-transmitter and magnetic deflection/torque formation. 316LVM specimens that are not allowed to be in the MRI environment were found to be acceptable in the 1.5T-MRI environment since there was no magnetic deflection and RF-induced overheating. Ti-alloy specimens were found harmless under the same conditions. 316L and CoCrMo-alloy specimens were considered hazardous due to the magnetic deflection formation. This study demonstrates that bio-metals which were not allowed to be in MRI devices such as 316LVM are not harmful to patients in 1.5T MRI.

Keywords: Biomaterials; Material Design and Analysis; RF-Induced Heating; Magnetic Resonance Imaging; MRI; Thermal Properties; Material Characterisation; Safety and Hazards.