Contrast-enhanced Mri
Contrast-enhanced Mri - Related Videos
11:38
In vivo Imaging of Optic Nerve Fiber Integrity by Contrast-Enhanced MRI in Mice
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Cited by 7 •
2014
This video illustrates a method, using a clinical 3 T scanner, for contrast-enhanced MR imaging of the naïve mouse visual projection and for repetitive and longitudinal in vivo studies of optic nerve degeneration associated with acute optic nerve crush injury and chronic optic nerve degeneration in knock-out mice (p50KO).
05:50
Contrast Enhanced Vessel Imaging using MicroCT
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Cited by 17 •
2011
Contrast enhanced small animal vessel imaging by microCT is a rapid, cost-effective and high-throughput technique for serial in situ examination for tumor development, for analyzing the network of blood vessels that nourish them, and for following the response of tumors to preclinical therapeutic intervention(s).
06:24
Dynamic Contrast Enhanced Magnetic Resonance Imaging of an Orthotopic Pancreatic Cancer Mouse Model
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Cited by 9 •
2015
The goal of this protocol is to apply dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) for orthotopic pancreatic tumor xenografts in mice. DCE-MRI is a non-invasive method to analyze microvasculature in a target tissue, and useful to assess vascular response in a tumor following a novel therapy.
08:36
Functional Neuroimaging Using Ultrasonic Blood-brain Barrier Disruption and Manganese-enhanced MRI
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Cited by 4 •
2012
A technique is described for broadly opening the blood-brain barrier in the mouse using microbubbles and ultrasound. Using this technique, manganese can be administered to the mouse brain. Because manganese is an MRI contrast agent that accumulates in depolarized neurons, this approach enables imaging of neuronal activity.
06:49
Phase Contrast and Differential Interference Contrast (DIC) Microscopy
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Cited by 26 •
2008
This protocol highlights the principles and practical applications of Phase and Differential Interference Contrast (DIC)...
FAQs
Gadolinium-based agents change the magnetic relaxation properties of nearby water protons. That change modifies MRI signal intensity in the regions where the agent is present, creating contrast between tissues. The resulting signal differences are not merely visual enhancements: they help radiologists identify areas whose perfusion or tissue-barrier behavior differs from surrounding normal tissue.
Enhancement patterns provide information about how an abnormality interacts with its blood supply and surrounding tissue. Radiologists evaluate these patterns to help assess tumors, inflammation, infection, vascular disorders, and organ function. Interpretation depends on the distribution of signal changes, so enhancement is used as a diagnostic clue rather than an isolated finding.
Contrast-enhanced sequences add information that noncontrast images may not show, particularly changes related to perfusion and breakdown of protective barriers. Comparing both types gives radiologists a more complete evaluation of anatomy and abnormalities. This combined approach helps distinguish baseline tissue appearance from changes that become visible after the agent alters local MRI signal.
Changes in protective barriers can influence where the contrast agent produces visible enhancement. Radiologists use this distribution, together with perfusion-related information, to identify tissue behavior associated with disease. This is important because the pattern may help separate an abnormal region from nearby tissue and can contribute to evaluating tumors, inflammation, infection, or vascular disorders.
The examination generally includes MRI sequences obtained without contrast and additional imaging after an injected contrast agent is administered. Radiologists then compare signal patterns across the sequences, assessing tissues, vessels, and abnormalities. This workflow preserves baseline structural information while adding clues about perfusion, protective-barrier disruption, and organ function.
Contrast-enhanced MRI is particularly useful when clinicians need to characterize disease-related abnormalities, evaluate vascular disorders or organ function, and support treatment planning or monitoring. It can contribute to assessment of tumors, inflammation, and infection as well. Because MRI does not use ionizing radiation, the technique provides this contrast-based information without that form of exposure.