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 Field Due To A Thin Straight Wire01:28

Magnetic Field Due To A Thin Straight Wire

5.9K
Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
5.9K
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

6.0K
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.
6.0K
Magnetic Field of a Solenoid01:18

Magnetic Field of a Solenoid

5.4K
A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
Consider a solenoid with 100 turns wrapped around a cylinder of...
5.4K
Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

4.2K
Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
4.2K
Magnetic Fields01:27

Magnetic Fields

7.0K
A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
7.0K
Magnetic Field due to Moving Charges01:23

Magnetic Field due to Moving Charges

11.2K
A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
11.2K

You might also read

Related Articles

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

Sort by
Same author

Reversible alterations of brain acetate metabolism associated with alcohol consumption.

Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology·2026
Same author

Field-Based Spatial Self-Registration of Multicoil Hardware for B<sub>0</sub> Field Control.

Magnetic resonance in medicine·2026
Same author

Sample size calculations for pilot cluster-randomised controlled trial: a review 2010-2020.

Pilot and feasibility studies·2026
Same author

Simulation of B<sub>0</sub> magnetic field conditions in the human heart for improved diagnostic MRI.

Zeitschrift fur medizinische Physik·2026
Same author

Robust determination of deuterium abundance in water.

Magma (New York, N.Y.)·2026
Same author

The consequences of using statistical tests on proxy measurements in place of gold standard measurements: an application to magnetic resonance spectroscopy.

Scientific reports·2025
Same journal

Localization-driven exchange contrast in diffusion exchange spectroscopy.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
Same journal

4.5 Tesla superconducting miniature magnet in liquid nitrogen.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
Same journal

Folding and unfolding dynamics of a DNA aptamer studied by heteronuclear <sup>1</sup>H-<sup>13</sup>C correlation zz-exchange spectroscopy.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
Same journal

Multi-spin control from one-spin pulses.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
Same journal

Altering MRI rotating frame relaxations by changing the truncation level of Hyperbolic Secant pulse.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
Same journal

Effects of proton exchange on the lifetimes of long-lived states in aliphatic chains.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
See all related articles

Related Experiment Video

Updated: Dec 18, 2025

Electric and Magnetic Field Devices for Stimulation of Biological Tissues
13:29

Electric and Magnetic Field Devices for Stimulation of Biological Tissues

Published on: May 15, 2021

5.6K

Multi-coil magnetic field modeling.

Christoph Juchem1, Dan Green, Robin A de Graaf

  • 1Yale University School of Medicine, Department of Diagnostic Radiology, MR Research Center (MRRC), 300 Cedar Street, New Haven, CT 06520, USA.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|October 8, 2013
PubMed
Summary
This summary is machine-generated.

Multi-coil (MC) magnetic field modeling effectively generates spherical harmonic (SH) shapes for magnetic resonance imaging, matching or exceeding the efficiency of dedicated coils for complex field generation.

Keywords:
AccuracyEfficiencyMagnetic fieldsModelingSpherical harmonic functions

More Related Videos

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T
10:22

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T

Published on: January 16, 2021

5.8K
How to Use the H1 Deep Transcranial Magnetic Stimulation Coil for Conditions Other than Depression
07:00

How to Use the H1 Deep Transcranial Magnetic Stimulation Coil for Conditions Other than Depression

Published on: January 23, 2017

24.6K

Related Experiment Videos

Last Updated: Dec 18, 2025

Electric and Magnetic Field Devices for Stimulation of Biological Tissues
13:29

Electric and Magnetic Field Devices for Stimulation of Biological Tissues

Published on: May 15, 2021

5.6K
MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T
10:22

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T

Published on: January 16, 2021

5.8K
How to Use the H1 Deep Transcranial Magnetic Stimulation Coil for Conditions Other than Depression
07:00

How to Use the H1 Deep Transcranial Magnetic Stimulation Coil for Conditions Other than Depression

Published on: January 23, 2017

24.6K

Area of Science:

  • Magnetic Resonance Imaging (MRI) and Spectroscopy
  • Electromagnetism and Magnetic Field Modeling

Background:

  • Spherical harmonic (SH) shapes are fundamental for spatial encoding and magnetic field homogenization in MRI.
  • Dedicated wire patterns and SH coils are traditionally used for generating these magnetic field shapes.

Purpose of the Study:

  • To compare the performance of multi-coil (MC) magnetic field modeling against dedicated wire patterns for SH shape generation.
  • To evaluate the efficiency and capabilities of an MC setup for various SH orders and region sizes in MRI.

Main Methods:

  • Analysis of a 48-channel MC setup for generating SH shapes up to fourth order.
  • Comparison of MC efficiency for linear gradient fields with conventional and state-of-the-art SH gradient coils.
  • Assessment of MC efficiency for synthesizing complex field shapes requiring multiple SH terms.

Main Results:

  • The analyzed MC setup successfully generated all first through fourth order SH shapes across relevant regions of interest.
  • MC efficiency for linear gradients is comparable to dedicated SH coils; efficiency increases with field complexity.
  • MC shimming demonstrates superior performance and efficiency gains compared to current SH shimming techniques.

Conclusions:

  • The MC approach shows significant potential to replace conventional shim coil systems in MRI.
  • MC technology enables object-specific magnetic field optimization, similar to object-specific RF coils, offering tailored solutions.