Magnetic Microdevices for MRI-Based Detection of SARS-CoV-2 Viruses

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Infectious Disease Diagnostics

Background:

• The COVID-19 pandemic necessitates rapid and accurate diagnostic tools.
• Current methods for SARS-CoV-2 detection can be time-consuming or require specialized equipment.
• Magnetic microdevices offer a novel approach for biosensing applications.

Purpose of the Study:

• To engineer a micron-scale device capable of acting as an MRI-based reporter for SARS-CoV-2.
• To investigate the feasibility of using magnetic microdevices for viral detection via MRI.

Main Methods:

• Fabrication of iron rod microdevices using template-guided synthesis.
• Suspension of microdevices in phosphate-buffered saline (PBS).
• Addition of heat-inactivated SARS-CoV-2 viruses and subsequent low-field MRI imaging.

Main Results:

• Observed decreased MRI signal intensity at lower concentrations of SARS-CoV-2.
• Signal intensity recovered with increasing viral concentrations.
• Electron microscopy suggested concentration-dependent shielding of water protons by iron microdevices.

Conclusions:

• Preliminary findings support the potential of magnetic microdevices for SARS-CoV-2 diagnostics.
• Further research is warranted to explore their role in assessing viral presence and concentration.
• This technology could offer a new avenue for infectious disease detection.