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Magnetic Resonance Imaging

Magnetic Resonance Imaging

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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Magnetic Resonance Imaging of Multiple Sclerosis at 7.0 Tesla

Magnetic Resonance Imaging of Multiple Sclerosis at 7.0 Tesla

Published on: February 19, 2021

7T human spine imaging arrays with adjustable inductive decoupling.

Bing Wu¹, Chunsheng Wang, Roland Krug

¹Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA 94158, USA.

IEEE Transactions on Bio-Medical Engineering

|August 28, 2009

Summary

Researchers developed novel 7-tesla (7T) magnetic resonance imaging (MRI) transceiver arrays for the human spine. These arrays improve radiofrequency coil element decoupling, enhancing imaging performance for ultrahigh-field applications.

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Area of Science:

Medical Imaging
Biophysics
Electrical Engineering

Background:

Ultrahigh-field (UHF) magnetic resonance imaging (MRI) offers enhanced signal-to-noise ratio but presents significant technical hurdles for human spine coil arrays.
Achieving adequate radiofrequency (RF) B(1) field penetration, sensitivity, and element decoupling remains challenging for large-coverage spine arrays at 7 Tesla (7T).

Purpose of the Study:

To design, fabricate, and evaluate novel transceiver coil arrays for 7T human spine MRI.
To address the critical issue of element-to-element decoupling in UHF spine coil arrays.

Main Methods:

Development of transceiver arrays utilizing loop-shaped microstrip transmission lines for 7T MRI.
Implementation of an adjustable inductive decoupling technique to enhance isolation between adjacent coil elements.
Fabrication and experimental testing of the designed coil arrays.

Main Results:

The designed transceiver arrays demonstrated effective isolation between adjacent elements using the adjustable inductive decoupling method.
Preliminary human spine MRI scans showcased the feasibility and robust performance of the developed arrays.
The arrays proved suitable for parallel imaging techniques in ultrahigh-field MR applications.

Conclusions:

The novel loop-shaped microstrip transmission line transceiver arrays are feasible for 7T human spine MRI.
The adjustable inductive decoupling technique effectively resolves isolation issues between coil elements.
The developed arrays show robust performance, paving the way for advanced ultrahigh-field spine imaging.