Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

8.9K
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...
8.9K
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

1.6K
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
1.6K
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

6.1K
Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
6.1K
Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

1.1K
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
1.1K
Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

733
Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
733
Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

1.5K
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
1.5K

You might also read

Related Articles

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

Sort by
Same authorSame journal

High-Resolution Atomic Magnetometer-Based Imaging of Integrated Circuits and Batteries.

IEEE transactions on instrumentation and measurement·2026
Same author

Non-invasive ventral cervical magnetoneurography as a proxy of in vivo lipopolysaccharide-induced inflammation.

Communications biology·2024
Same author

High-performance silicon photonic single-sideband modulators for cold-atom interferometry.

Science advances·2024
Same author

Four-channel optically pumped magnetometer for a magnetoencephalography sensor array.

Optics express·2024
Same author

A Four-channel Optically Pumped Magnetometer for a Magnetoencephalography Sensor Array.

ArXiv·2024
Same author

Single-trial classification of evoked responses to auditory tones using OPM- and SQUID-MEG.

Journal of neural engineering·2023
Same journal

Pixel Latency Measurements of Event Cameras.

IEEE transactions on instrumentation and measurement·2026
Same journal

Guest Editorial Special Section on IEEE CPEM 2024.

IEEE transactions on instrumentation and measurement·2026
Same journal

Wearable Ultrasound Sensing with Dual Arrays and Machine Learning for Real-Time Tremor Characterization and Antagonist Muscle Monitoring.

IEEE transactions on instrumentation and measurement·2026
Same journal

Cross-Detection for Bubble-free Thermometer Codes and Dual-Side Monitoring for FPGA-Based High-Accuracy and High-Precision Time-to-Digital Converters.

IEEE transactions on instrumentation and measurement·2026
Same journal

Measuring Subtle HD Data Representation and Multimodal Imaging Phenotype Embedding for Precision Medicine.

IEEE transactions on instrumentation and measurement·2025
See all related articles

Related Experiment Video

Updated: Jan 3, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

7.6K

Magnetic Source Imaging Using a Pulsed Optically Pumped Magnetometer Array.

Amir Borna1, Tony R Carter1, Paul DeRego2

  • 1Sandia National Laboratories, PO Box 5800, Albuquerque, NM 87185-1082, USA.

IEEE Transactions on Instrumentation and Measurement
|November 29, 2019
PubMed
Summary
This summary is machine-generated.

We created a 24-channel pulsed optically pumped magnetometer (OPM) array for magnetic source imaging (MSI). This system accurately maps magnetic fields from current distributions, enabling detailed current imaging.

Keywords:
OPMSERFcurrent distribution imagingmagnetic field mapmagnetic source imagingmagnetometer

More Related Videos

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.9K
Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement
09:43

Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

Published on: November 7, 2017

9.8K

Related Experiment Videos

Last Updated: Jan 3, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

7.6K
Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.9K
Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement
09:43

Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

Published on: November 7, 2017

9.8K

Area of Science:

  • Physics
  • Magnetometry
  • Electrical Engineering

Background:

  • Magnetic field mapping is crucial for understanding current distributions.
  • Optically pumped magnetometers (OPMs) offer high sensitivity for magnetic field detection.

Purpose of the Study:

  • To develop and validate a pulsed optically pumped magnetometer (OPM) array for magnetic source imaging (MSI).
  • To demonstrate the system's capability in reconstructing current distributions from measured magnetic fields.

Main Methods:

  • Development of a 24-channel pulsed OPM array with a data rate of 500 S/s, sensitivity of 0.8 fT/√Hz, and 72 dB dynamic range.
  • Measurement of magnetic field maps from a test coil structure by moving the coils across the OPM array.
  • Application of inverse problem-solving techniques to reconstruct 2D current distributions from the captured magnetic field data.

Main Results:

  • The pulsed OPM MSI system successfully measured magnetic field maps of a test coil.
  • The experimental magnetic field maps showed excellent agreement with simulation results.
  • Reconstructed current distribution images derived from the inverse problem closely matched simulation data.

Conclusions:

  • The developed pulsed OPM array is a viable tool for magnetic source imaging.
  • The system demonstrates high accuracy in mapping magnetic fields and reconstructing current distributions.
  • This technology has potential applications in areas requiring precise current analysis.