Abstract: A magnetic resonance method and system are provided for providing improved simultaneous multislice echo planar imaging (EPI) with navigator-based correction of image data for B0 drift and N/2 ghosting. The correction is based on two types of multi-echo phase-encoded navigator sequences having opposite readout gradient polarities, and optionally also uses a non-phase-encoded navigator sequence. One or more navigator sequences can be generated between each RF excitation pulse and the subsequent EPI readout sequence. A dynamic off-resonance in k-space technique can be used to correct for B0 drift, and a modified slice GRAPPA technique that is based on odd and even kernels can provide slice-specific correction for N/2 ghosting effects for the EPI MR image data sets. Various patterns of navigator sequences and/or interpolation of navigator data can be used to improve accuracy of the image data corrections.

Abstract: An apparatus for performing magnetic resonance force microscopy on one or more large area samples comprising a base plate, one or more heat sink plates coupled to the base plate, one or more suspension mechanisms coupled to the base plate and the heat sink plates, a probe head suspended from the one or more suspension mechanisms for scanning the one or more samples and a sample cylinder comprising a sample stage coupled to the probe head for sample positioning and an outer drum for isolating the sample stage.

Abstract: A high resolution magnetic resonance force microscope is adapted to study biological systems, such as isolated cells, sub-cellular organelles and other sub-cellular structures, or cellular receptors and proteins, at resolutions ranging from 1 micron to 1 Å. The proposed magnetic resonance force microscope allows the direct, non-destructive, chemical specific, three-dimensional imaging of biological systems. In some embodiments, the biological sample may be altered to enhance its ability to be detected by its nuclear or electron spin resonance. In a particularly preferred embodiment, a paramagnetic agent is incorporated into cells by endocytosis.

Abstract: A nondestructive detection apparatus for detecting tendon failures in a prestressed concrete slab. The detection apparatus includes a cart adapted to be moved over the prestressed concrete slab. A metal sensor and a distance meter are connected to the cart. As the cart is moved over the slab, the metal sensor takes readings of a length of tendon and the distance meter measures the distance traversed by the cart. The detection apparatus also includes a controller that interfaces with the metal sensor and the distance meter. The controller is constructed and arranged to sample the readings generated by the metal sensor at predetermined distance intervals traversed by the cart.

Abstract: In a method for the phase correction of nuclear magnetic resonance signals given a pulse sequence wherein image echos are acquired under readout gradients of alternating operational sign, first and third reference echos (S.sub.1.sup.+, S.sub.3.sup.+) are acquired under sub-pulses of the readout gradient with a first polarity and a second reference echo (S.sub.2.sup.-) is acquired under a sub-pulse of the opposite polarity. An interpolation echo (S.sub.2.sup.+) that fictitiously occurs at the echo time of the second reference echo (S.sub.2.sup.-) is formed by interpolation from the first and third reference echo (S.sub.1.sup.+, S.sub.3.sup.+). Correction data are determined by comparing the second reference echo (S.sub.2.sup.-) to the interpolation echo (S.sub.2.sup.+).

Abstract: A method for detecting gaps to be bridged in a power supply of an electric rail vehicle includes continuously sensing at least one conductor rail for gaps with at least one contact signal transmitter travelling ahead of a plurality of electrically interconnected real current collectors, as seen in the direction of travel of the rail vehicle, with signal information obtained being stored. An instantaneous contact situation between the real current collectors and the conductor rail is determined from the memory contents. Positions of a virtual current collector travelling in advance are formed for each real current collector from the memory contents, with the distances between the contact signal transmitter and the virtual current collectors being such that a necessity to change over the traction power converter into the regenerative braking mode is indicated as soon as all of the virtual current collectors meet a gap in the conductor rail.

Abstract: A high frequency magnetic property measuring apparatus for soft magnetic film includes a magnetic detection device for detecting the intensity of magnetization in a sample material, a high frequency magnetic field generator for generating magnetic field, a power source for supplying current to the magnetic field generator, and a data processing device for getting high frequency magnetic parameters of the sample by using a detection signal output from the magnetic detector. The magnetic field generator is made up of a plane-shaped coil of a conductor having a configuration in which both ends of the plane-shaped coil are closed to form a cavity as a second internal cavity in which the detector is placed. The magnetic detector is made up of a plane-shaped coil of a conductor having a configuration in which both ends of said plane-shaped coil are closed to form a cavity as a first internal cavity in which the sample material is placed. The magnetic detector is placed in the magnetic field generator.