125 results about "Array coil" patented technology

A RF array coil system and method for magnetic resonance imaging are provided. The array coil system includes an anterior coil section having a main anterior coil section and at least one secondary anterior coil section removably attachable to the main anterior coil section. The array coil system further includes a posterior coil section having a main posterior coil section and at least one secondary posterior coil section removably attachable to the main posterior coil section.

A MRI array coil for imaging a human includes a posterior array, an anterior torso array and an anterior head-neck-upper-chest array. The head-neck-upper-chest array has a head portion mountable to the anterior array and a neck-upper-chest portion hingingly attached to the head portion.

In a linear motor, each arrayed coil unit (160) of a stator yoke (151) is divided into an upper coil (161) and lower coil (162). A cooling pipe (153) is interposed between the upper coil (161) and the lower coil (162).

A magnetic resonance imaging (MRI) array coil system and method for breast imaging are provided. The MRI array coil system includes a top coil portion with two openings configured to receive therethrough objects to be imaged. The MRI array coil system further includes a bottom coil portion having two openings configured to access from sides of the bottom coil portion the objects to be imaged. The top coil portion and bottom coil portion each have a plurality of coil elements configured to provide parallel imaging.

A method and apparatus for acquiring high resolution MR images of a carotid artery. A six-channel RF coil array has three RF coils placed in an overlapping pattern and positioned adjacent to a first region-of-interest (ROI) of an imaging patient. The six-channel RF coil also has three RF coils placed in an overlapping pattern and positioned adjacent to a second ROI of an imaging patient.

An integrated motorized pump (1) comprising an impeller (2) mounted on an axle (3), two magnetic drives (6) electromagnetically coupled to an electric motor (7), a casing (8) with a flowing space (9), an inlet channel (10) and an (11). The impeller (2) has circumferential arrayed magnetic means (13) magnetized in the direction parallel to the axle (3). The electric motor (7) comprising said impeller (2) as a rotor, and two stator plates (20). The stator plates (20) are covered with a liquid tight coating and comprise circumferential arrayed coils (21) etched on circuit board metal layers (22). Each magnetic drive (6) comprises a stator (14) with circumferential arrayed coil windings (16) and two magnetized disks (15). The magnetized disks (15) are mounted on the axle (3) perpendiculary to it and have a circumferential carry of radially extending poles (17).

An electric drive comprising a stator with at least two ring-shaped windings and controllers, and a magnetized rotor with an axis of rotation. Each of said windings comprises at least one coil layer with circumferentially arrayed coils located around said axis, and a layer of electro-insulating material, and each winding is electrically connected to a power source through an individual controller. At least two said windings are electrically connected by their controllers in parallel, with the possibility to function jointly and/or independently. At least two nearest windings are located in such a way that two said coil layers belonging to the different windings are separated by an additional layer of electro-insulating material. The coils of said nearest coil layers of different windings are made the same in transparent view, so that the distances between corresponding parts of said coils of said nearest windings are equal to the thickness of said additional layer of an electro-insulating material. At least two said nearest windings are made as parts of a common multi-layer printed circuit board.

The invention relates to a method of parallel imaging reconstruction in parallel magnetic resonance imaging reconstruction. Magnetic resonance data is acquired in parallel by an array of separate RF receiver coils. A reconstruction method based on Tikhonov regularization is presented to reduce the SNR loss due to geometric correlations in the spatial information from the array coil elements. In order to reduce the noise amplification of the reconstruction so-called “g-factor”, reference scans are utilized as a priori information of the final reconstructed image to provide regularized estimates for the reconstruction using the L-curve technique. According to the invention the method with the proposed L-curve approach was fully automatic and showed a significant reduction in average g-factors in the experimental_images.

The invention relates to an array induction logging coil system for measuring the formation resistivity. The coil system consists of a transmitting coil and 7 sets of double-receiving coils which consist of a plurality of screening coils and a plurality of main receiving coils, wherein the transmitting coil and each set of the double-receiving coils form a sub array, all 15 coils are wound on a non-conductive frame, the screening coils are connected with the main receiving coils in series, however, the winding directions of the screening coils and the main receiving coils are opposite, the set of the position of the main receiving coils considers the radial investigation depth, the lengthways resolution ratio and the signal focusing and synthesizing treatment requirement, the screening coils are arranged between the transmitting coil and the main receiving coils, the position and the number of the screening coils meet the condition of offsetting direct coupled signals, change the radial investigation depth and the lengthways resolution ratio, and meet the condition that the signal to noise ratio is 2-4; the other screening coils except the first sub array coil in the 7 sub array coils are overlapped with the center positions of the main receiving coils of the former sub array; and the investigation range of the resistivity is wide, so that the coil system can measure the formation resistivity more accurately.

An inspection system including a radio frequency (RF) subsystem and a quadrupole resonance (QR) tube array coil. The RF subsystem may include a variable frequency RF source to provide RF excitation signals at a frequency generally corresponding to predetermined, characteristic QR frequencies of a specimen. The QR tube array coil may be implemented using a plurality of conductive tubes defining a cavity of predetermined volume. Typically, the plurality of conductive tubes are spaced at a distance relative to one another to form at least two non-conductive gaps between tubes in the array. After RF excitation signals are applied to the specimen within the cavity, the QR tube array coil may generate a QR output signal responsive to QR signals generated by the specimen.

A cooler for electronic devices provides cool air to the inlet sides of the heat sink by using a radial blower with blades located around air outlets of the heat sink. This blower is driven by a brushless DC electric motor. The motor has an opening in the center allowing for the transfer of incoming air to the center of the heat sink. The rotors outer circumferential arrayed poles are rigidly secured to the frame of the radial blower. The stator of the motor is rigidly secured to the heat sink and has an opening in its center. The stator comprises circumferential arrayed coils on circuit board material. When the current flows through the stator coils, the coils acquire a magnetic polarity. The poles of the rotor and stator coils attract and repel depending on the polarities. The cool air comes simultaneously from opposite sides of the heat sink. For this reason the heat sink has a divider located approximately in the middle of the heat sink fins. The blades of the radial blower are located around the air outlets on the heat sink. Because the ambient air is drawn in from both sides of the heat sink the air path length through the heat sinks channels is effectively halved. This results in an increased cooling ability for the heat sink because of the increase in temperature differentials.

The present invention relates to an underwater propelling device (10) i

• • a stator (20) comprising circumferential arrayed coils (35) and being adapted to generate a controlled electromagnetic field along an axial direction,
  • a shaftless propellant rotor (30) comprising:
    • at least two magnetized ring-shaped plates, respectively an upper magnetized plate (31) and a lower magnetized plate (32), coaxially spaced-apart along said axial direction and perpendicular thereto such that said circumferential arrayed coils (35) are positioned therebetween, each plate (31, 32) defining a central aperture (31a, 32a) and having a circumferential array of radially extended magnetized poles (34) embedded therein, said magnetized poles (34) generating a magnetic field which interacts with the electromagnetic field of the stator (20) so as to cause the rotation of said plates (31, 32) about a central axis (ZZ′) parallel to said axial direction,
    • at least one ring-shaped propeller (33) defined by its outer periphery and its inner periphery, said propeller being received inside the central apertures (31a, 32a) of said plates (31, 32) and fixedly secured thereto,
    • a plurality of propeller blades (35) projecting inward from the inner periphery of said propeller (33), said blades (35) producing a thrust along the central axis (ZZ′) when the plates (31, 32) rotate,

wherein the rotor (30) is axially separated from the stator (20) by a gap, preferably less than 3 mm, so as to permit the formation of a hydraulic film inside said gap, said hydraulic film being adapted to provide lubrication of the rotor, thus reducing friction between the rotor and the stator, and to transmit the axial thrust force of the rotor to the stator.

An imaging device for imaging an anaesthetized animal such as a rodent (rats or mice or other animals), with the device having a split array coil capable of providing at least two channels for use in a restraining assembly with animal bed for magnetic resonance imaging (MRI) the animal in real-time in a non-destructive manner.

An imaging device for imaging an anaesthetized animal such as a rodent (rats or mice or other), with the device having a split array coil providing at least two channels for use in a restraining assembly and animal bed for magnetic resonance imaging (MRI) the animal in real-time in a non-destructive manner.

A vertical field MRI RF coil array for neurovascular imaging includes a head section having a solenoid coil element and a quadrature coil element; a neck section having a solenoid coil element and a quadrature coil element; and a chest section having a solenoid coil element and a quadrature coil element.

The invention relates to a wireless charging device, in particular to a wireless magnetic-resonance charging device based on array coils. The wireless magnetic-resonance charging device comprises a power supply, a control circuit, a driving circuit and a transmitting terminal, which are sequentially connected, and a receiving terminal and an electric energy converting circuit, which are sequentially connected, wherein the transmitting terminal comprises a plurality of spiral coils; the receiving terminal is a spiral coil. The wireless magnetic-resonance charging device has the advantages as follows: 1, different from conventional circular coils, the coils adopting efficient array structures can enable an electromagnetic field to be distributed uniformly to a certain extent; 2, the distribution of the electromagnetic field generated by the efficient array coils compared with conventional coils is more regular; 3, under a certain external environmental condition, the distribution of the efficient array coils can be regulated so as to efficiently transmit electric energy; 4, the transmitting array coils and the receiving array coil can have the same or different structures and can be flexibly regulated.