Magnetic guidewire steering at ultrahigh magnetic fields

Tiryaki M. E., Elmacioglu Y. G., Sitti M.

SCIENCE ADVANCES, cilt.9, sa.17, 2023 (SCI-Expanded, Scopus) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 9 Sayı: 17
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1126/sciadv.adg6438
  • Dergi Adı: SCIENCE ADVANCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, CAB Abstracts, Compendex, MEDLINE, Veterinary Science Database, Directory of Open Access Journals, Nature Index
  • Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

With remote magnetic steering capabilities, magnetically actuated guidewires have proven their potential in minimally invasive medical procedures. Existing magnetic steering strategies, however, have been limited to low magnetic fields, which prevents the integration into medical systems operating at ultrahigh fields (UHF), such as magnetic resonance imaging (MRI) scanners. Here, we present magnetic guidewire design and steering strategies by elucidating the magnetic actuation principles of permanent magnets at UHF. By modeling the uniaxial magnetization behavior of permanent magnets, we outline the magnetic torque and force and demonstrate unique magnetic actuation opportunities at UHF, such as in situ remagnetization. Last, we illustrate the proposed steering principles using a magnetic guidewire composed of neodymium magnets and a fiber optic rod in a 7-Tesla preclinical MRI scanner. The developed UHF magnetic actuation framework would enable nextgeneration magnetic robots to operate inside MRI scanners.