Invivo Corporation

Mri Devices Corp.

Koninklujke Philips N.v.

Charles Albert Saylor

G Randy Duensing

Arne Reykowski

Feng Huang

Wei Lin

Yu Li

A magnetic resonance system includes a magnetic resonance scanner () and a magnetic resonance scan controller (). A plurality of markers () are attached to the subject to monitor motion of a portion of a subject within an examination region. A motion control unit receives motion data from the markers indicative of the motion and controls the magnetic scan controller to adjust scan parameters to compensate for the motion. In one embodiment, the marker () includes a substance () which resonates at a characteristic frequency in response to radio excitations by the magnetic resonance scanner. A controller () switches an inductive circuit () disposed adjacent the substance between a tuned state and a detuned state.

Wireless prospective motion marker

Embodiments of the invention pertain to a resonator for use in magnetic resonance imaging. Embodiments of the subject invention pertain to a high-field mode-stable resonator for use in magnetic resonance imaging. Embodiments also pertain to a method of generating and/or receiving rf magnetic fields in a field of view (FOV) for magnetic resonance imaging. An embodiment can incorporate a shielded cylindrical resonator having 16 elements that are coupled to one another by a transmission line resonator.

High-field mode-stable resonator for magnetic resonance imaging

Embodiments of the subject invention can utilize a single coil structure for dual-mode operation. In a specific embodiment, a single coil structure can be used as a volume coil in the transmitting phase and as a phase array in the receiving phase. In an embodiment, a transmit coil array in accordance with the subject invention can be utilized for one or more of the following:) parallel RF excitation on an MRI scanner equipped with a multiple-channel transmitter;) serial RF excitation with the use of a switch system with a single channel transmitter; and) generation of a homogeneous Bfield for regular MRI with the use of a power splitter on a standard scanner. In a specific embodiment, the use of a concentric double loop coil with different tunings of inner and outer loops can be implemented. In an embodiment, the coil elements can be decoupled using the CRC mode of a concentric double loop coil. In an embodiment, a surface coil transmit array can provide better compatibility with a receive array. In a specific embodiment, an over-coupled technique can be used to improve the phase control of the transmitting pulse.

High field head coil for dual-mode operation in magnetic resonance imaging

The subject invention pertains to a technique and device that can isolate and separate resultant electromagnetic fields of volume coils at high frequency. In an embodiment, an RF shield can be used to isolate and separate resultant electromagnetic fields. In an embodiment, the shield can have a cylindrical shape that can form a partially closed volume in which an object to be imaged, or sample, can be inserted. In an embodiment, the RF shield can be part of a RF coil. In a specific embodiment, some parts of a volume coil can be inside a shield, and the other parts of a volume coil can be outside the shield. The shielding of some of the parts of a volume coil can create conductor patterns corresponding to the specific parts inside the shield and the specific parts outside the shield. In an embodiment, two or more conductor patterns can be placed in proximity to the same shield and either be driven independently, driven together, or act as receiving elements, combined or uncombined. This embodiment is advantageous because the combination of conductor patterns can be optimized by the flexibility of separating the fields of end-rings from the fields of leg currents.

Method and apparatus for discrete shielding of volume RFcoil arrays

The subject invention pertains to an imaging technique and apparatus which can utilize an array of RF probes to measure the non-resonant thermal noise which is produced within a sample, such as a body, and produce a non-resonant thermal noise correlation. The detected noise correlation is a function of the spatial overlap of the electromagnetic fields of the probes and the spatial distribution of the conductivity of the sample. The subject technique, which can be referred to as Noise Tomography (NT), can generate a three-dimensional map of the conductivity of the sample. Since the subject invention utilizes detection of the thermal noise generated within the body, the subject method can be non-invasive and can be implemented without requiring external power, chemicals, or radionuclides to be introduced into the body. The subject imaging method can be used as a stand along technique or can be used in conjunction with other imaging techniques.

Growing community of inventors

Gainesville, FL, United States of America

Charles Albert Saylor