High-speed Resonant Scanner
High-speed Resonant Scanner - 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.
02:52
Resonance
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2020
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N-O and N=O bonds. If nitrite ions do indeed contain a single and a double bond, the two bond lengths are expected to be different. A double bond between two atoms is shorter (and stronger) than a single bond between the same two atoms. However, experiments show that both N–O bonds in NO2− have the same strength and length, and are identical in all other...
09:15
fMRI: Functional Magnetic Resonance Imaging
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2023
Functional magnetic resonance imaging (fMRI) is a non-invasive neuroimaging technique used to investigate human brain function and cognition in both healthy individuals and populations with abnormal brain states. Functional MRI utilizes a magnetic resonance signal to detect changes in blood flow that are coupled to neuronal activation when a specific task is performed. This is possible because hemoglobin within the blood has different magnetic properties depending on whether or not it is bound...
13:56
The Use of Magnetic Resonance Spectroscopy as a Tool for the Measurement of Bi-hemispheric Transcranial Electric Stimulation Effects on Primary Motor Cortex Metabolism
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Cited by 30 •
2014
This article aims to describe a basic protocol for combining transcranial direct current stimulation (tDCS) with proton magnetic resonance spectroscopy (1H-MRS) measurements to investigate the effects of bilateral stimulation on primary motor cortex metabolism.
11:37
Cardiac Magnetic Resonance Imaging
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2023
Source: Frederick W. Damen and Craig J. Goergen, Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana In this video, high field, small-bore magnetic resonance imaging (MRI) with physiological monitoring is demonstrated to acquire gated cine loops of the murine cardiovascular system. This procedure provides a basis for assessing left-ventricular function, visualizing vascular networks, and quantifying motion of organs due to respiration. Comparable small animal...
FAQs
The scanner drives an oscillating mirror or similar element near its natural frequency. At this operating condition, the element repeatedly sweeps the focused beam across the sample, producing rapid line scans without requiring a separate repositioning step for every scan. This repeated motion supports fast acquisition of changing signals in neural tissue.
Position synchronization links each detected signal to the beam location that produced it. Because the scanning element is continuously moving, the system must associate signal measurements with the corresponding points along each line. Accurate synchronization allows the recorded data to form a spatially meaningful image while preserving the timing information needed to examine dynamic neural changes.
Higher scanning speed helps capture time-sensitive neuronal activity and other rapid changes that a slower acquisition may blur or fail to resolve clearly. It also shortens the interval during which motion can affect the image, which can reduce motion-related distortion during live-sample imaging. The main benefit is improved capture of transient rather than static features.
Researchers would favor this approach when the experiment focuses on changing neural activity or dynamic alterations in neural tissue rather than only stable structure. Its rapid repeated line scans are particularly relevant for live-sample imaging, where both biological events and sample motion can occur during acquisition. The method therefore suits time-sensitive observations in neuroscience.
They provide images in which signal intensity remains associated with a defined location in the sample and a specific point in the scan cycle. This combination supports observation of where dynamic changes occur and when they occur during image acquisition. In neuroscience, that relationship helps researchers examine neuronal activity and evolving features of neural tissue.
Compared with conventional slower scanners, the rapid acquisition can lessen temporal blurring of events that change during imaging. It can also reduce the opportunity for sample motion to distort each acquired image. These advantages are most relevant when researchers need to follow fast neuronal or tissue dynamics and preserve their appearance more faithfully during live imaging.