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Magnetic Resonance Imaging

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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...

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Edge-Enhancing Gradient-Echo MP2RAGE for Clinical Epilepsy Imaging at 7T.

S Tao¹, X Zhou², E Greco²

¹From the Departments of Radiology (S.T., X.Z., E.G., V.G., E.M.W., V.P., E.H.M.) Tao.Shengzhen@mayo.edu.

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Summary

The new EDGE-MP2RAGE sequence improves 7T MRI for detecting focal cortical dysplasia by enhancing image quality and acquisition efficiency. This advanced technique offers better contrast for clearer visualization of brain abnormalities.

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A Multimodal Imaging- and Stimulation-based Method of Evaluating Connectivity-related Brain Excitability in Patients with Epilepsy

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Published on: November 13, 2016

Area of Science:

Neuroimaging
Magnetic Resonance Imaging (MRI)
Medical Physics

Background:

Focal cortical dysplasia (FCD) detection is crucial for epilepsy diagnosis and treatment.
Conventional 3D edge-enhancing gradient-echo (EDGE) MRI offers high contrast-to-noise ratio (CNR) for FCD detection.
Applying EDGE at 7 Tesla (7T) MRI presents challenges including image inhomogeneity and low acquisition efficiency.

Purpose of the Study:

To develop an optimized 7T MRI sequence for improved FCD detection.
To enhance data acquisition efficiency while maintaining high image quality.
To simultaneously acquire both EDGE and T1-weighted contrasts.

Main Methods:

Development and optimization of a novel EDGE-MP2RAGE sequence for 7T MRI.
Simultaneous acquisition of EDGE and T1-weighted contrasts.
Evaluation of image uniformity and gray-to-white matter contrast.

Main Results:

The optimized EDGE-MP2RAGE sequence successfully provided both EDGE and T1-weighted contrasts.
Achieved sufficient image uniformity in EDGE images at 7T.
Demonstrated high gray-to-white matter contrast in T1-weighted images.

Conclusions:

The EDGE-MP2RAGE sequence offers a promising solution for overcoming 7T MRI limitations in FCD detection.
Simultaneous acquisition improves efficiency, making advanced neuroimaging more feasible.
Optimized sequence parameters yield high-quality images crucial for accurate FCD diagnosis.