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

5.4K
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...
5.4K
Paramagnetism01:30

Paramagnetism

2.6K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
2.6K
Ferromagnetism01:31

Ferromagnetism

2.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.4K

You might also read

Related Articles

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

Sort by
Same author

Thermal and imaging effects of Feraheme in MR-guided focused ultrasound: a phantom study.

Physics in medicine and biology·2026
Same author

Mast cells shape early pulmonary inflammation and regulate dendritic cell abundance and localization after chemical induced lung injury.

Frontiers in immunology·2026
Same author

The growth and structural characterization of a La<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub>/BaTiO<sub>3</sub> superstructure (superlattice).

Acta crystallographica. Section A, Foundations and advances·2026
Same author

Comparison of commercial 1Tx32Rx vs. 8Tx32Rx head coils for routine 7T neuroimaging.

Frontiers in neuroimaging·2026
Same author

Wood smoke particles elicit events associated with adverse effects in human lung epithelial cells.

Frontiers in toxicology·2026
Same author

Graphene Modified with Curcumin: A Novel Approach to Tailoring the Glass Transition of PVC.

The journal of physical chemistry. B·2026

Related Experiment Video

Updated: Aug 6, 2025

Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere
08:52

Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere

Published on: April 30, 2018

8.2K

Magnetic particle based MRI thermometry at 0.2 T and 3 T.

John Stroud1, Yu Hao1, Tim S Read2

  • 1UCCS BioFrontiers Center, University of Colorado, Colorado Springs, 1420 Austin Bluffs Pkwy, Colorado Springs, CO 80918, United States; Department of Physics and Energy Science, University of Colorado, Colorado Springs 1420 Austin Bluffs Pkwy, Colorado Springs, CO 80918, United States.

Magnetic Resonance Imaging
|March 18, 2023
PubMed
Summary
This summary is machine-generated.

Ferrite particles in agar gel are effective MRI temperature indicators for low-field scanners. Even with lower signal, they offer accurate temperature measurement (±1.0°C) within short acquisition times.

Keywords:
Low magnetic field scannersMRI temperature sensorsMRI thermometryMagnetic particlesMagnetic resonance imaging

More Related Videos

Magnetic-, Acoustic-, and Optical-Triple-Responsive Microbubbles for Magnetic Hyperthermia and Pothotothermal Combination Cancer Therapy
09:01

Magnetic-, Acoustic-, and Optical-Triple-Responsive Microbubbles for Magnetic Hyperthermia and Pothotothermal Combination Cancer Therapy

Published on: May 22, 2020

3.2K
Magnetic Resonance Imaging of Multiple Sclerosis at 7.0 Tesla
08:51

Magnetic Resonance Imaging of Multiple Sclerosis at 7.0 Tesla

Published on: February 19, 2021

9.1K

Related Experiment Videos

Last Updated: Aug 6, 2025

Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere
08:52

Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere

Published on: April 30, 2018

8.2K
Magnetic-, Acoustic-, and Optical-Triple-Responsive Microbubbles for Magnetic Hyperthermia and Pothotothermal Combination Cancer Therapy
09:01

Magnetic-, Acoustic-, and Optical-Triple-Responsive Microbubbles for Magnetic Hyperthermia and Pothotothermal Combination Cancer Therapy

Published on: May 22, 2020

3.2K
Magnetic Resonance Imaging of Multiple Sclerosis at 7.0 Tesla
08:51

Magnetic Resonance Imaging of Multiple Sclerosis at 7.0 Tesla

Published on: February 19, 2021

9.1K

Area of Science:

  • Biomedical Engineering
  • Magnetic Resonance Imaging

Background:

  • Accurate temperature monitoring is crucial in various medical applications.
  • Magnetic Resonance Imaging (MRI) offers non-invasive temperature mapping capabilities.
  • Ferrite particles show potential as MRI-based temperature-sensitive agents.

Purpose of the Study:

  • To evaluate ferrite particles in agar gel phantoms as MRI temperature indicators.
  • To compare the performance of these indicators at low-field (0.2 T) versus high-field (3.0 T) MRI scanners.
  • To assess the feasibility of using low-field MRI for temperature measurements.

Main Methods:

  • Preparation of agar gel phantoms embedded with ferrite particles.
  • Acquisition of MR images at 0.2 T and 3.0 T under varying temperatures.
  • Analysis of temperature-dependent changes in MR image intensity and signal-to-noise ratio.
  • Calculation of temperature measurement uncertainty.

Main Results:

  • Low-field (0.2 T) MRI enables shorter repetition times and significant T2* weighting.
  • Strong temperature-dependent changes in MR image brightness were observed at 0.2 T within short acquisition times.
  • Despite lower signal-to-noise ratio at 0.2 T, a temperature uncertainty of ±1.0°C was achieved at 37°C with 90 μg/mL ferrite concentration.
  • High-field (3.0 T) MRI provided higher signal-to-noise ratio but required longer acquisition times for comparable temperature sensitivity.

Conclusions:

  • Ferrite-embedded agar gel phantoms are viable MRI temperature indicators for low-field scanners.
  • Low-field MRI offers advantages for rapid temperature mapping due to enhanced T2* effects.
  • The achieved temperature measurement accuracy at low-field MRI is sufficient for certain applications, balancing speed and precision.