Abstract: The present technique provides a novel method and apparatus for magnetic resonance device tracking. In one aspect of the present technique, a plurality of magnetic resonance tracking signals are acquired in response to a corresponding plurality of pulse sequences, wherein the plurality of magnetic resonance tracking signals are acquired from a tracking coil mounted in a device. A location value is also determined for each pulse sequence to produce a plurality of location values. Further, a candidate location value of the plurality of location values for replacement, an off-resonance error value for the plurality of magnetic resonance tracking signals, and a replacement location value based on the off-resonance error value are determined. The location of the device is also determined based on the plurality of location values, wherein the candidate location value was replaced in the plurality of location values with the replacement location value.

Abstract: The arrangement (10) is suited for transmitting an informative signal (S1), generated by suitable signal generator (1) at a first electrical site (7a) to a second electrical site (7b). The first electrical site (7a) is electrically connected to the second electrical site (7b) by means of a capacitively coupled transmission line (5a, 5b). In order to enable such capacitively coupled transmission line distributed or lumped capacitors (4a, 4b, 4c, 4d) can be used. The arrangement is connectable to an accessory device (6), which may comprise a spectrometer, a further signal generator, tuning means, etc. The further signal (S2) is generated by the accessory device (6) and transported via the capacitively coupled transmission line (5a, 5b) in a direction from the second electrical site (7b) to the first electrical site (7a). The further signal (S2) can be used for feeding an amplifier (2), or for carrying the signal (S1).

Abstract: A method of operation for a magnetic resonance imaging suite. A power supply of magnetic resonance injector system receives electrical power from an AC power outlet, both of which are located outside of a shielded room of the magnetic resonance imaging suite. Electrical power from the power supply of the magnetic resonance injector system is conveyed (via an appropriate power connection) into the shielded room of the magnetic resonance imaging suite and to a component (e.g., a power head) of the magnetic resonance injector system located inside the shielded room. While this electrical power is being conveyed, radio frequency energy emitted from the power connection is being filtered.

Abstract: A method for determining a proportion of a hydrocarbon constituent in a mixture including at least one hydrocarbon, includes determining at least one nuclear magnetic resonance (NMR) property for at least one hydrocarbon constituent in the mixture; correlating an NMR response for the property for each hydrocarbon constituent in the mixture; and from the correlating, calculating the proportion of at least the constituent. A computer program product is also provided.

Abstract: A method and system for imaging using labeled contrast agents and a magnetic resonance imaging (MRI) scanner are provided. The method comprises performing a prescan at a frequency selected to be substantially similar to a frequency of the labeled contrast agent and performing an examination scan at the frequency of the labeled contrast agent substantially immediately after administering the labeled contrast agent to a subject.

Abstract: A method for generating a calibrated parallel magnetic resonance image is provided in a manifestation of the invention. A magnetic resonance imaging excitation is applied. A plurality of echoes at different echo times (TE) is acquired. The acquired plurality of echoes from different echo times is used to create a chemical shift corrected calibration map.

Abstract: A probe suitable for use in unilateral nuclear magnetic resonance imaging and adapted to be embedded in a sample to be analysed, the probe comprising; a static magnetic field generator; a radiofrequency magnetic field generator adjacent to the static magnetic field generator; a circuit controlling the frequency response of the radiofrequency magnetic field generator, adjacent to the static magnetic field generator; an input cable coupled to the frequency control circuit and the frequency control circuit coupled to the radiofrequency magnetic field generator.

Abstract: There is provided an RF (radio frequency) coil assembly of a magnetic resonance imaging (MRI) system, which comprises a birdcage transmit-only coil using inhomogeneous modes. Further, a multi-channel receive-only phased array coil is provided. In one embodiment, the multi-channel receive-only phased array coil may include a plurality of ring-shaped receive-only coils, wherein the receive-only coils are connected to each other in a pseudo-chain-link configuration to form a ring shape. The multi-channel receive-only phased array coil may be located inside said transmit-only coil and spaced a predetermined distance apart therefrom. In accordance with the embodiments, emphasis images of the peripheral part of a human brain with high resolution and high signal to noise ratio may be obtained.

Abstract: In a measurement sequence and apparatus for three-dimensional magnetic resonance imaging, in which an acquisition of measurement data ensues by scanning multiple lines in k-space; and the number of k-space lines is apportioned among a number of partial acquisitions so that scanning of associated k-space lines occurs in each partial acquisition, the k-space lines are associated with the partial acquisitions such that the association corresponds to the following association rule: (a) evaluation of each k-space line with a distance measure that characterizes the distance of the respective k-space line relative to the k-space center, (b) arrangement of the k-space lines to be scanned in an order dependent on the distance measure, (c) grouping of the k-space lines arranged in order into a number of groups with a number of successive k-space lines being combined into a group, and (d) association of the k-space lines with the partial acquisitions by, for each group, the k-space lines combined into this group are app

Abstract: A inventive flow-meter uses a measuring method which is based on the passage time of fluid molecules in a single sensor, without using any magnetic field gradient for the measurement of said fluid mean velocity. This method consists of the ultrafast irradiation of hydrogen nuclei from fluid molecules through pulses which are repeated every short time intervals, following a Carr-Purcell-Meiboom-Gill (CPMG) type sequence.

Abstract: In a method and apparatus for accelerated spiral-coded imaging in magnetic resonance tomography using spiral-shaped k-space sampling, the underlying k-matrix is under-sampled such that an additional spiral is obtained by point mirroring of the measured values at the center of the k-matrix. This additional spiral forms a complete data set of the k-matrix together with the first spiral for imaging the output information.

Abstract: In a method for controlling a magnetic resonance system having a radio-frequency antenna structure and a number of individually controllable transmission channels, respective parallel radio-frequency signals are emitted via the transmission channels for generation of a desired radio-frequency field distribution in at least one specific volume region within an examination volume of the magnetic resonance system. A digital signal is generated for each of the transmission channels and is modulated on a carrier frequency. The radio-frequency signal so generated is transmitted via a radio-frequency signal path to the radio-frequency antenna structure and is amplified therein in a radio-frequency power amplifier.

Abstract: A non-linear phase correction method is provided. For the non-linear phase correction method, image information is acquired by gradient echo echo planar imaging (EPI). Reference information is acquired by spin echo EPI. The image information is corrected based on the reference information.

Abstract: A connection device is provided for connecting electronics of a head coil arranged on a patient support to a connector location provided on the patient support, the head coil being insertable into a PET detector arranged in a magnetic resonance instrument so that simultaneous magnetic resonance and PET recording is possible. In at least one embodiment, the connection device includes a cable connection with at least one releasable device for attachment to the electronics and the connector location, wherein the cable connection is fed from the electronics through the annular PET detector and externally on the PET detector back to the connector location.

Abstract: An RF coil assembly for an MRI system includes a resonator formed by a cylindrical shield and pairs of opposing conductive legs disposed symmetrically around a central axis and extending the axial length of the shield. Drive circuitry for each pair of opposing conductive legs includes a current balun that maintains substantially equal and opposite currents in the two conductive legs. Terminal susceptance elements are used to maintain maximum currents and minimum voltage at the midpoints of the conductive legs. Multinuclear measurements can be made simultaneously at different Larmor frequencies.

Abstract: This invention relates to a method for improving the performance of a nuclear quadrupole resonance detection system by reducing, during reception, the coupling between one or more excitation coils that provide a radio frequency magnetic field that excites quadrupole nuclei, and one or more high temperature superconductor receive coils that detect the resulting nuclear quadrupole resonance signal.

Abstract: A method for magnetic resonance imaging (MRI) a first volume and a second volume spaced apart from the first volume is provided. The first volume is excited with a first linearly varying phase with respect to k-space. The second volume is excited with a second linearly varying phase with respect to k-space, wherein the first linearly varying phase has a different slope than the second linearly varying phase. Data in k-space is acquired line by line. The acquired data in k-space is Fourier transformed to image space. An image is formed with a first volume image and a second volume image from the transformed data. Use of phase modulation allows imaging with a reduced field-of-view, which can result in faster scan times or improved performance of parallel imaging acquisition strategies.

Abstract: To reduce high SAR values in the field of magnetic resonance imaging, and particularly with a whole body coil assembly for an MRI apparatus, at least a bracket is added between the supporting tube of a whole body coil assembly and the connecting copper sheet in order to radially raise the connecting copper sheet and the capacitors away from the human body. In addition to effectively solving the problem of a high SAR value, at the same time no significant loss of the imaging performance occurs. Moreover, the structure is simple, so the costs of modification or production are low.

Abstract: A magnetic resonance imaging apparatus includes a unit which generates a diffusion weighted image based on a magnetic resonance signal from an object, a unit which calculates an apparent diffusion coefficient based on the diffusion weighted image, and a processing unit which subjects the diffusion weighted image to a process of indicating a region having the apparent diffusion coefficient of less than a threshold value with a highlight in contrast with other region.

Abstract: A method for determining a wax appearance temperature of a fluid includes obtaining nuclear magnetic resonance (NMR) measurements of the fluid at a plurality of temperatures; deriving a NMR parameter from each of the NMR measurements; and determining the wax appearance temperature by analyzing the NMR parameter as a function of temperature. An apparatus for detecting wax appearance in a fluid includes a sample cell for holding a fluid for nuclear magnetic resonance (NMR) measurements at a plurality of temperatures; a temperature measuring device disposed proximate the sample cell; a magnet for polarizing molecules in the fluid in the sample cell; at least one radiofrequency (RF) coil for generating pulses of magnetic field and for detecting NMR signals; and circuitry for controlling and measuring the temperature of the fluid in the sample cell and for obtaining NMR measurements.