Case Western Reserve University

Other

Koninklijke Philips Corporation N.v.

Eddy Y Wong

Jeffrey L Duerk

Jonathan S Lewin

Claudia M Hillenbrand

Daniel Robert Elgort

Mark A Griswold

Michael Andrew Morich

Zhiyong Zhai

Robert Gauss

Chris Flask

Kevin Nieman

Christopher A Flask

Ken Pin Wang

Nabeel M Malik

A router (), for use with magnetic resonance systems (), selectively routes unique excitation signals, generated by a multi-channel radio-frequency (RF) amplifier, over transmission lines (Tx) to any one of a plurality of connection panels () which each accepts at least one RF coil assembly having multiple coil elements (). Each connection panel () includes transceiver ports () for connecting at least one conductor () of the coil elements () to a corresponding transceiver channel (T/R). The router () selectively routes magnetic resonance signals received by the conductors () from the transceiver channels (T/R) to a multi-channel RF receiver (). The coin elements may carry sine-mode currents or uniform currents.

Router and coil array for ultra high field MRI

Systems, methodologies, media, and other embodiments associated with automatically adapting MRI controlling parameters are described. One exemplary method embodiment includes configuring an MRI apparatus to acquire MR signal data using a non-rectilinear trajectory. The example method may also include acquiring MR signals, transforming the MR signals into image data, and selectively adapting the MRI controlling parameters based, at least in part, on information associated with the MR signals.

Adaptive imaging parameters with MRI

A new and improved method for tracking and/or spatial localization of an invasive device in Magnetic Resonance Imaging (MRI) is provided. The invention includes providing an invasive device including a marker having a chemically shifted signal source with a resonant frequency different from the chemical species of the subject to be imaged, applying a pulse sequence, detecting the resulting RF magnetic resonance signals, and determining the 3D coordinates of the marker. The invention also includes generating scan planes and reconstructing an image from the detected signals to generate an image having the marker contrasted from the subject. The invasive device includes a marker having a chemically shifted signal source which has a resonant frequency different from the chemical species of the subject to be imaged for use in tracking the device during imaging.

Chemical shift markers for improved wireless fiducial marker tracking

Extended-coverage magnetic resonance imaging coils with optimized homogeneity in longitudinal sensitivity are described. One exemplary coil includes four elements, where two of the elements are opposed-solenoid imaging elements and two of the elements are single loop imaging elements.

Extended-coverage imaging coil

A radio frequency coil includes an operative radio frequency circuit (') and a trap radio frequency circuit (&#x2032;). The operative radio frequency circuit is tuned to a magnetic resonance frequency and is spatially configured to at least one of generate magnetic resonance in or receive magnetic resonance from a spatial region of interest. The trap radio frequency circuit is tuned to block a selected frequency and is disposed with the operative radio frequency circuit. The trap radio frequency circuit includes at least a generally linear transmission line () having a first end (&#x2032;) at which the operative radio frequency circuit and the trap radio frequency circuit are coupled together and a second end () at which the generally linear transmission line is terminated with a termination impedance ().

RF traps for radio frequency coils used in MRI

A system and method to perform parallel MR imaging are disclosed. The system comprises an MR imaging machine and a probe having at least two MR RF reception coils. Each coil of the probe is operationally connected to a separate receiver channel of the MR imaging machine. The MR imaging machine implements a partially parallel acquisition method to excite precessing nuclear spins, in and around an internal segment of a patient into which the probe is inserted, and to use the coils of the catheter to simultaneously sample a plurality of response signals to form reduced k-space data sets for each of the coils. The plurality of response signals represent nuclear magnetic resonance signals arising from the precessing nuclear spins. The reduced k-space data sets are further processed by the MR imaging machine to generate a full volume dataset of a region in and around the vessel.

System and method to perform parallel imaging

A probe suitable for attachment to, or incorporation in, a medical interventional device, such as a catheter, and which may be employed for tracking, imaging, or both, includes a first material having an MR resonance frequency distinct from a resonance frequency of a second material adjacent to the first material. The probe may include one or more coils, or it may be wireless, that is, it may have no coils. Some probe configurations are directed at tracking or imaging of vascular vessels or tissue, and configurations allow both tracking and imaging.

Growing community of inventors

Richmond Heights, OH, United States of America

Eddy Y Wong