Live Animal Mri
Live Animal Mri - Related Videos
12:27
Noninvasive In Vivo Small Animal MRI and MRS: Basic Experimental Procedures
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Cited by 9 •
2009
This work describes basic procedures of noninvasive small animal MRI and MRS in vivo.
06:06
Optogenetic Functional MRI
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Cited by 15 •
2016
This protocol describes the steps and data analysis required to successfully perform optogenetic functional magnetic resonance imaging (ofMRI). ofMRI is a novel technique that combines high-field fMRI readout with optogenetic stimulation, allowing for cell type-specific mapping of functional neural circuits and their dynamics across the whole living brain.
08:41
Assessment of Cardiac Function and Myocardial Morphology Using Small Animal Look-locker Inversion Recovery (SALLI) MRI in Rats
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Cited by 2 •
2013
Contrast enhanced cardiac magnetic resonance (CMR) imaging allows comprehensive in vivo assessment of the heart in small animal models of cardiovascular disease. Here we detail the procedures to perform CMR imaging, reconstruction and analysis using Small Animal Lock-Locker Inversion Recovery (SALLI) in rats.
01:37
Non-invasive Monitoring and Imaging in Animal Research
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2026
All animal procedures described here must be conducted in accordance with institutional animal ethics guidelines and approved by IACUC. All procedures must follow the principles of the 3Rs—Replacement, Reduction, and Refinement—and must be performed by trained personnel. Non-invasive technologies support the principles of 3Rs by enabling repeated data collection from the same animal without the need for euthanasia at multiple time points. These approaches reduce the number of animals required...
26:43
Computer-Generated Animal Model Stimuli
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Cited by 8 •
2007
Computer-generated stimuli using the Jacky dragon as a model.
FAQs
The imaging signal begins when the magnetic field aligns hydrogen nuclei in tissue. Radiofrequency pulses then interact with these aligned nuclei, and spatial magnetic-field gradients distinguish signals according to their location. The scanner converts the resulting signals into cross-sectional images, allowing researchers to relate image features to specific anatomical regions within a living animal.
Hydrogen nuclei provide the tissue-based source of the MRI signal described in the scanning process. Their alignment in the magnetic field and subsequent response to radiofrequency pulses produce measurable information. Because tissues differ in composition and relaxation behavior, their hydrogen-related signals are not identical, enabling image contrast between internal structures.
MRI contrast reflects differences in tissue composition and relaxation behavior. These differences change how tissues contribute to the measured signal, so adjacent structures can appear distinct even within the same cross-sectional image. Interpreting this contrast helps researchers examine organ structure and physiology rather than viewing anatomy as a uniform pattern.
Longitudinal imaging allows the same animal to be examined repeatedly as disease progresses or a treatment takes effect. This reduces reliance on sacrificing separate animals at each observation point and provides a way to follow changes over time. The resulting measurements can connect structural or physiological changes with individual disease and therapy trajectories.
The workflow includes positioning the living animal for scanning, applying the magnetic field and radiofrequency pulses, using spatial gradients to encode signal location, and converting the recorded signals into cross-sectional images. Researchers then examine tissue-dependent contrast to assess anatomy or physiology. This sequence supports repeated observations when the study requires measurements at multiple time points.
In medicine and biomedical research, live animal MRI can support studies of disease progression, organ structure, organ function, and treatment response. It also helps evaluate how findings from experimental models relate to clinical medicine. By supplying noninvasive, time-linked observations, the method contributes to pathology research, therapy assessment, and translational outcomes.