Abstract:
A magnetic-resonance imaging system including a magnetic-resonance sensor including at least one magneto-resistive element; and a sample disposed adjacent to the magnetic-resonance sensor and configurable to generate a magnetic-resonance signal, wherein the magneto-resistive element is configured to generate a magnetic field in response to a current driven through the magneto-resistive element, the magnetic field being configured to polarize spins of the sample, and detect a magnetic-resonance signal from precession of the spins.
Abstract:
A magnetic-resonance imaging system including a magnetic-resonance sensor including at least one magneto-resistive element; and a sample disposed adjacent to the magnetic-resonance sensor and configurable to generate a magnetic-resonance signal, wherein the magneto-resistive element is configured to generate a magnetic field in response to a current driven through the magneto-resistive element, the magnetic field being configured to polarize spins of the sample, and detect a magnetic-resonance signal from precession of the spins.
Abstract:
The invention combines (A) capabilities in fabrication, characterization, and manipulation of single domain magnetic nanostructures, with (B) the use of binding chemistry of biological molecules to modify the magnetic nanostructures into magnetic sensors (40) and magnetically controllable nanoprobes (70). A biological characterization scheme is realized by combining nanomanipulation and observation of small magnetic structures in fluids. By coating nanomagnets with biological molecules, ultra-small, highly sensitive and robust biomagnetic devices are defined, and molecular electronics and spin electronics are combined. When these nano-sensors are integrated into microfluidic channels, highly efficient single-molecule detection chips for rapid diagnosis and analysis of biological agents are constructed.
Abstract:
Tomographic imaging using an imaging sensor that lias a stupe-like shape is disclosed where a stripe sensor is mechanical!) scanned over a sample at different angles f or a single stripe detector imaging, linear motion and angular rotation are required Single stripe sensor imaging may be performed using an elongated inductive coil detector B\ utilizing an array of parallel stnpe sensors that can be individually addressed, two-dimensional imaging can be performed with rotation, only, eliminating the requirement for linear motion, e g with parallel coils array Imaging with a stripe-type sensor of particular width and thickness (where width is much larger than thickness) is resolution limited αnl\ by the thickness (smaller parameter) of the sensor Multiple sensor families can be produced where this imaging technique max be beneficial such as magneto-resistix- e. inductiv e, SQl UD, and Hall effect sensors, and particularly in the field of magnetic resonance imaging (Mill).
Abstract:
An electromagnetic actuator for a microfluidic pump of the type that causes periodic pinching and releasing against the walls of a fluidic channel, e.g., a tube. At least one permanent magnet is placed against the walls of the fluidic channel, and located in an area with magnetic fields, produced by coils that are radially symmetric to the channel. The permanent magnet is cause to press and release against the wall of the fluid channel to cause a fluid flow through the channel.
Abstract:
A glass pipette such as an electrode for electrophysiological recording is coated with quantum dots. This greatly aids the ability to observe the glass pipette, particular in tissue as the quantum dots provide an excellent performance under two-photon illumination used to visualize objects at depths of hundreds of microns.
Abstract:
The reversible transverse susceptibility of magnetic nanoparticles is used to achieve magnetic flux amplification in magnetic resonance settings. Nanoparticles having substantially uniaxial or unidirectional magnetic anisotropy and a reversible transverse susceptibility in the presence of the high DC magnetic field provide either or both of an amplification of the generated signal of an inductive coil or the detected signal of an inductive coil.
Abstract:
The reversible transverse susceptibility of magnetic nanoparticles is used to achieve magnetic flux amplification in magnetic resonance settings. Nanoparticles having substantially uniaxial or unidirectional magnetic anisotropy and a reversible transverse susceptibility in the presence of the high DC magnetic field provide either or both of an amplification of the generated signal of an inductive coil or the detected signal of an inductive coil.
Abstract:
Systems and methods for obtaining two- and three-dimensional magnetic resonance images by using azimuthally symmetric dipolar magnetic fields from magnetic spheres . A complete two- or three- dimensional structured rendering of a sample can be obtained without the motion of the sample relative to the sphere. Magnetic spheres in the range of 100 μm and 100 nm are used with samples that are approximately one-tenth as large as the magnetic sphere . Sequential positioning of the integrated sample-sphere system in an external magnetic field being much larger than the magnetic field of the sphere (e.g. 10T) at various angular orientations provides all the required imaging slices for successful computerized tomographic image reconstruction. The requirement to scan the sample relative to the magnetic tip is eliminated. Resolutions approaching atomic dimensions are expected to be obtained.
Abstract:
An electromagnetic actuator for a microfluidic pump of the type that causes periodic pinching and releasing against the walls of a fluidic channel, e.g., a tube. At least one permanent magnet is placed against the walls of the fluidic channel, and located in an area with magnetic fields, produced by coils that are radially symmetric to the channel. The permanent magnet is cause to press and release against the wall of the fluid channel to cause a fluid flow through the channel.