Magnetic Particles Imaging
Magnetic Particles Imaging - Related Videos
07:01
Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
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Cited by 5 •
2016
A scanner for imaging magnetic particles in planar samples was developed using the planar frequency mixing magnetic detection technique. The magnetic intermodulation product response from the nonlinear nonhysteretic magnetization of the particles is recorded upon a two-frequency excitation. It can be used to take 2D images of thin biological samples.
03:06
Growth and Differentiation of Magnetic Nano Particle-Loaded Neurons on Magnetic Platforms
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2025
This video demonstrates the uptake of fluorescent magnetic nanoparticles (MNPs) by the neuronal cells via endocytosis. Growing these MNP-loaded neurons on the magnetically patterned substrate enables the attachment of the cells. The addition of a growth factor containing medium aids in the growth of neuron extensions, while the magnetic field of the substrate directs the orientation of the extension.
09:08
Multiple-mouse Neuroanatomical Magnetic Resonance Imaging
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Cited by 59 •
2011
Magnetic resonance imaging (MRI) has become an increasingly popular tool for examining the phenotype of genetically altered mice. This article illustrates the methods necessary to achieve high-throughput phenotyping of genetically altered mice using multiple-mouse MRI.
03:43
A Technique for Magnetic Glass Particle-Mediated Nucleic Acid Extraction from Blood
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2025
This video demonstrates a technique for nucleic acid extraction from whole human blood using magnetic glass particles (MGPs) — small magnetic beads coated with silica. Upon lysing the blood cells using a lysis buffer, the released nucleic acids bind to the surface of silica-coated MGPs, extracting the molecules from the sample.
16:31
Echo Particle Image Velocimetry
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Cited by 10 •
2012
An echo particle image velocimetry (EPIV) system capable of acquiring two-dimensional fields of velocity in optically opaque fluids or through optically opaque geometries is described, and validation measurements in pipe flow are reported.
FAQs
Superparamagnetic particles respond nonlinearly to the applied magnetic field, so their magnetization changes in a way that distinguishes particle-containing regions from the surrounding sample. This response enables the field-free region to select where signal is generated. As a result, the system can localize magnetic nanoparticle tracers rather than simply recording a nonspecific magnetic response from the entire imaging volume.
The field-free region provides a location where the magnetic nanoparticles can contribute selectively to the detected signal. Moving this region through the imaging volume changes which portion of the sample is interrogated at a given time. The resulting position-dependent measurements allow the distribution of tracer material to be mapped in three dimensions, supporting spatial analysis of transport or biological activity.
The drive field magnetizes the superparamagnetic particles and supports their changing response as the selected region moves. Receiver coils detect the resulting magnetic signal, converting particle behavior into measurable data. Together, these components connect controlled field manipulation with signal acquisition, allowing tracer location and concentration to be assessed across the imaging volume.
Because the measured signal reflects the distribution of magnetic nanoparticle tracer, MPI can provide quantitative information about tracer concentration rather than only a qualitative image. Three-dimensional mapping also makes it possible to follow how material is distributed through a sample or living system. In engineering studies, these outcomes support analysis of transport, delivery, and system performance.
An investigation begins by introducing or preparing a sample containing magnetic nanoparticle tracer, then placing it within the imaging volume. The drive field magnetizes the particles while the field-free region selects locations as it moves. Receiver coils record the resulting signals, which are used to map the tracer distribution and evaluate material movement or function.
MPI can track the distribution of magnetic nanoparticle tracers as they move through a system, making it useful for studying fluid flow and targeted delivery. The same measurements can help evaluate device performance by showing where tracer material travels. In image-guided biomedical systems, this information supports visualization of delivery-related behavior within a sample or living system.