Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Phase Contrast and Differential Interference Contrast Microscopy

Phase Contrast and Differential Interference Contrast Microscopy

Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...

Magnetic Resonance Imaging

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same journal

RETRACTED: Ndaguba et al. Operability of Smart Spaces in Urban Environments: A Systematic Review on Enhancing Functionality and User Experience. <i>Sensors</i> 2023, <i>23</i>, 6938.

Sensors (Basel, Switzerland)·2026

Same journal

Correction: Ma et al. A Lightweight, Low-Frequency, Broadband Underwater Acoustic Transducer with Ternary Symmetric Excitation: Integrating KNN and Terfenol-D for Enhanced Performance. <i>2026</i>, <i>26</i>, 3645.

Sensors (Basel, Switzerland)·2026

Same journal

Correction: He et al. An Edge-Computing-Based Emotion-Aware Adaptive Lighting System for Intelligent Cockpits. <i>Sensors</i> 2026, <i>26</i>, 3489.

Sensors (Basel, Switzerland)·2026

Same journal

Correction: Tu et al. Lower Limb Motion Recognition with Improved SVM Based on Surface Electromyography. <i>Sensors</i> 2024, <i>24</i>, 3097.

Sensors (Basel, Switzerland)·2026

Same journal

Real-Time Detection System for Road Roughness Based on Ultrasonic Technology.

Sensors (Basel, Switzerland)·2026

Same journal

FedHSFV: Federated Learning for Finger Vein Recognition via Hierarchical Decoupling and Subspace Metric.

Sensors (Basel, Switzerland)·2026

Search research articles

Related Experiment Video

Updated: Jul 22, 2026

Measurement Of Neuromagnetic Brain Function In Pre-school Children With Custom Sized MEG

Measurement Of Neuromagnetic Brain Function In Pre-school Children With Custom Sized MEG

Published on: February 19, 2010

Phantom-Based Approach for Comparing Conventional and Optically Pumped Magnetometer Magnetoencephalography Systems.

Daisuke Oyama¹, Hadi Zaatiti²

¹Applied Electronics Laboratory, Kanazawa Institute of Technology, Kanazawa 920-1331, Japan.

Sensors (Basel, Switzerland)

|April 12, 2025

Summary

This study directly compared magnetoencephalography (MEG) sensor technologies using a dry phantom. Optically pumped magnetometers (OPMs) showed higher signal amplitude but greater source localization error than superconducting quantum interference devices (SQUIDs).

Keywords:

dry phantom magnetoencephalography optically pumped magnetometers superconducting quantum interference device

More Related Videos

Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy

Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy

Published on: December 6, 2016

Detecting Pre-Stimulus Source-Level Effects on Object Perception with Magnetoencephalography

Detecting Pre-Stimulus Source-Level Effects on Object Perception with Magnetoencephalography

Published on: July 26, 2019

Related Experiment Videos

Last Updated: Jul 22, 2026

Measurement Of Neuromagnetic Brain Function In Pre-school Children With Custom Sized MEG

Measurement Of Neuromagnetic Brain Function In Pre-school Children With Custom Sized MEG

Published on: February 19, 2010

Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy

Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy

Published on: December 6, 2016

Detecting Pre-Stimulus Source-Level Effects on Object Perception with Magnetoencephalography

Detecting Pre-Stimulus Source-Level Effects on Object Perception with Magnetoencephalography

Published on: July 26, 2019

Area of Science:

Neuroscience
Biophysics
Biomedical Engineering

Background:

Magnetoencephalography (MEG) measures neural activity via magnetic fields.
Superconducting Quantum Interference Devices (SQUIDs) and Optically Pumped Magnetometers (OPMs) are key MEG sensor technologies.
Direct hardware-level comparisons of SQUID and OPM systems using controlled phantoms are lacking.

Purpose of the Study:

To establish a framework for direct hardware-level comparison of SQUID-MEG and OPM-MEG systems.
To evaluate sensor performance using a dry phantom simulating neuronal activity.
To identify factors influencing source localization accuracy in both MEG systems.

Main Methods:

A dry phantom designed to emulate neuronal activity was used.
Data were acquired simultaneously from SQUID and OPM-MEG systems within a magnetically shielded room.
Environmental noise and shielding conditions were kept consistent for both systems.

Main Results:

OPM sensors, positioned closer to the source, yielded signal amplitudes 3-4 times greater than SQUID sensors.
OPM-MEG systems exhibited a source localization error approximately three times larger than SQUID-MEG systems.
Factors such as sensor-to-source distance, sensor count, SNR, and spatial coverage influenced OPM localization error.

Conclusions:

This study provides a novel hardware-level comparison of SQUID and OPM-MEG technologies using a controlled phantom.
While OPMs offer superior signal amplitude, SQUIDs currently provide higher source localization accuracy.
Further research is needed to optimize OPM system configurations for improved spatial resolution in MEG.