Quality Electrodynamics, LLC

Siemens Aktiengesellschaft

Quality Electrodynamics (Qed)

Matthew Finnerty

Tsinghua Zheng

Xiaoyu Yang

Yong Wu

Thomas Eastlake

Arne Hengerer

Volker Matschl

David Michael Berendt, Jr

John Thomas Carlon

Gregory Weisberg

Joshua Robert Reiderman

In some embodiments, the present disclosure relates to a multi-turn (MT) birdcage magnetic resonance imaging (MRI) radio-frequency (RF) coil. The MT birdcage MRI RF coil includes a first conductive ring, a second conductive ring, and a plurality of conductive rungs. Each of the plurality of conductive rungs includes a first end coupled to the first conductive ring, and a second end coupled to the second conductive ring. At least one of the first conductive ring and the second conductive ring includes more than one turn. The first conductive ring, the second conductive ring, and the plurality of conductive rungs form a plurality of meshes.

Multi-turn birdcage MRI coil and applications

The present disclosure is directed to a balun package comprising a set of inductive baluns for a magnetic resonance imaging (MRI) radio frequency (RF) coil. A first resonant circuit and a second resonant circuit each comprise an inductor. A first decoupling circuit leg is between and shared by the first and second resonant circuits and includes one or more decoupling inductors and/or one or more decoupling capacitors. A first cable bundle is wound to form the inductor of the first resonant circuit or is otherwise spaced from and inductively coupled to the inductor of the first resonant circuit.

Balun package comprising multiple inductive baluns for an MRI RF coil

In some embodiments, the present disclosure relates to a flexible magnetic resonance imaging (MRI) radio frequency (RF) array coil configured to operate in at least one of a transmit (Tx) mode or a receive (Rx) mode. The MRI RF array coil includes a first row of saddle coil elements. At least a first saddle coil element and a second saddle coil element are in the first row. The first and second saddle coil elements partially overlap with one another. Each of the first and second saddle coil elements include a left loop and a right loop that is coupled to the left loop by two connection segments.

MRI saddle based flexible array coil

Example magnetic resonance imaging (MRI) radio frequency (RF) coils employ flexible coaxial cable. An MRI RF coil may include an LC circuit and an integrated decoupling circuit. The LC circuit includes one or more flexible coaxial cables having a first end and a second end, the one or more flexible coaxial cables having an inner conductor, an outer conductor, and a dielectric spacer disposed between the inner conductor and the outer conductor, where the outer conductor of the coaxial cable is not continuous between the first end and the second end at a first location. The integrated decoupling circuit may include a PIN diode and a tunable element. The tunable element may be tunable with respect to resistance, capacitance, or inductance, and thus may control, at least in part, the frequency at which the LC circuit resonates during RF transmission, or an impedance at the first location.

Flexible coaxial magnetic resonance imaging (MRI) coil with integrated decoupling

In order to provide interventional access during an image-guided interventional procedure, while increasing the signal-to-noise ratio for generated images compared to a single loop coil, a local coil includes a single coil element disposed around an opening through the local coil and two coil elements positioned on opposite sides of the single coil element. The opening provides access for an interventional tool used during the image-guided interventional procedure.

MRI coil for use during an interventional procedure

Example magnetic resonance imaging (MRI) radio frequency (RF) coils are described. An MRI RF coil may include an LC circuit and an integrated decoupling circuit. The integrated decoupling circuit may include a wire or other conductor that is connected to the LC circuit and that is positioned within a defined distance of the LC circuit. The integrated decoupling circuit may include a PIN diode and a tunable element. The tunable element may be tunable with respect to resistance, capacitance, or inductance, and thus may control, at least in part, the frequency at which the LC circuit resonates during RF transmission. The example MRI RF coil has more than one point of high impedance, which facilitates reducing heating and operational issues associated with conventional coils.

Magnetic resonance imaging (MRI) coil with integrated decoupling

Example magnetic resonance imaging (MRI) radio frequency (RF) coils are described. An MRI RF coil may include a first terminal and a second terminal that are connected by a coaxial cable. Rather than rely exclusively on two terminal passive components (e.g., resistor, inductor, capacitor), example coax MRI RF coils rely on the capacitance that can be created in the coax cable between the inner conductor and the outer conductor. The capacitance of the coil may be controlled by selectively disrupting (e.g., cutting, stripping) the outer conductor, the inner conductor, or the dielectric material disposed between the inner and outer conductor.

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University Heights, OH, United States of America

Matthew Finnerty