US 5,675,254 AGranted

Double-resonance MRI coil

AssigneeThe Board of Trustees of the University of Illinois

InventorsDaniel Fiat, Janez Dolinsek

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Abstract

A double-resonance coil for use in MRI having a coil element, a first input/output terminal coupled to the coil element, and a second input/output terminal coupled to the coil element. A first resonance means is coupled between the coil element and the first input/output terminal to cause the MRI coil to resonate at a first MRI frequency, and a second resonance means is coupled between the coil element and the second input/output terminal to cause the MRI coil to resonate at a second MRI frequency substantially different than the first MRI frequency. The double resonance coil includes a first frequency-blocking means coupled to the coil element for substantially preventing the second MRI frequency from being detected at the first input/output terminal and a second frequency-blocking means coupled to the coil element for substantially preventing the first MRI frequency from being detected at the second input/output terminal.

Claims20

Dependent claims

A double-resonance MRI coil for use in magnetic resonance imaging, said double-resonance MRI coil comprising:

a coil element for transceiving an MRI imaging signal;
a first input/output terminal coupled to said coil element;
a second input/output terminal coupled to said coil element;
first resonance means coupled between said coil element and said first input/output terminal for causing said MRI coil to resonate at a first MRI frequency of the MRI imaging signal;
second resonance means coupled between said coil element and said second input/output terminal for causing said MRI coil to resonate at a second MRI frequency of the MRI imaging signal, said second MRI frequency being different than said first MRI frequency, and at least one of said first and second MRI frequencies being less than 20 Mhz.;
first frequency-blocking means coupled to said coil element for substantially preventing said second frequency from being detected at said first input/output terminal, said first frequency-blocking means comprising a coaxial cable having a length;
and
second frequency-blocking means coupled to said coil element for substantially preventing said first frequency from being detected at said second input/output terminal, said second frequency-blocking means comprising a second coil element.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/623,667Filed 28 Mar 1996 · continuation
Priority: 2 Jun 1993
Granted: 7 Oct 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G01R 33/3635
Tuning/matching of the transmit/receive coil: multi-frequency operation
G01R 33/3621
Electrical details, e.g. matching or coupling of the coil to the receiver: nMR receivers or demodulators, e.g. preamplifiers, means for frequency…
G01R 33/3628
Electrical details, e.g. matching or coupling of the coil to the receiver: tuning/matching of the transmit/receive coil
G01R 33/563
Image enhancement or correction, e.g. subtraction or averaging techniques , e.g. improvement of signal-to-noise ratio and resolution: of moving…

Family

Serial71,582Parent of this continuation-in-part · filed 2 Jun 1993
Serial105,419Parent of this continuation · filed 12 Aug 1993
Serial501,888Parent of this continuation · filed 13 Jul 1995
US 5,433,196 AParent of this continuation-in-part
US 5,675,254 AThis patent

From the US filing history. Foreign family members aren’t listed.