Patents Examined by Brij B. Shrivastav
  • Patent number: 7821261
    Abstract: A data processing system configured to process acquired image data (e.g., as part of a diagnostic imaging apparatus) uses a signal-power estimating unit for estimating signal power by using reference data containing data different from processing-target data and a data processing unit for processing the processing-target data by using a WF (wiener filter) based on the signal power estimated by the signal-power estimating unit.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: October 26, 2010
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventor: Tokunori Kimura
  • Patent number: 7821268
    Abstract: An electronics device for a magnetic resonance apparatus has a housing in which one or more electronic components to be cooled are accommodated, with a flat cold distributor provided in the housing that can be supplied with an externally fed coolant, and that is associated with a blower to circulate the air inside the housing.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: October 26, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventor: Herbert Albrecht
  • Patent number: 7816919
    Abstract: A magnetic resonance apparatus gantry includes a cylindrical static magnet housing which accommodates a static field magnet and in which an opening portion is formed, a cylindrical gradient magnet housing which accommodates a gradient coil, is placed in the opening portion, and is shorter in length in an axial direction than the static magnet housing, and a support unit which supports the gradient magnet housing on the static magnet housing, and includes a first support member mounted on the static magnet housing, a second support member mounted on the gradient magnet housing and supported by the first support member, and an adjustment unit which is placed inside the static magnet housing in the axial direction and adjusts a relative positional relationship between the static magnet housing and the gradient magnet housing by changing the relative positional relationship between the first support member and the second support member.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: October 19, 2010
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventor: Masatoshi Yamashita
  • Patent number: 7816916
    Abstract: In a magnetic resonance imaging method and apparatus, magnetic resonance data are acquired (an examination subject) using a zoomed method, and reconstruction of the image of the examination subject is undertaken using a parallel imaging reconstruction method.
    Type: Grant
    Filed: September 15, 2008
    Date of Patent: October 19, 2010
    Assignees: Siemens Aktiengesellschaft, Siemens S.p.A.
    Inventors: Fabrizio Fasano, Robin Heidemann, Josef Pfeuffer
  • Patent number: 7816917
    Abstract: A permeability measurement apparatus includes a magnetic field generation means applying an alternating magnetic field having a predetermined frequency to a magnetic substance to be measured; a probe needle placed in proximity or in contact to a microscopic area of the magnetic substance to be measured to which the alternating magnetic field is applied; a resonator including a coil wound on the probe needle, and generating a magnetic field having a resonant frequency higher than the frequency of the alternating magnetic field applied on the microscopic area having the probe needle in proximity or in contact thereto, and having an inductance of the coil varied as permeability in the microscopic area varies; and a measurement means measuring the permeability of the microscopic area of the magnetic substance to be measured based on the variation of the resonant frequency of the resonator according to the variation of the coil inductance.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: October 19, 2010
    Assignee: Tohoku University
    Inventor: Yasuo Cho
  • Patent number: 7812605
    Abstract: A phantom for examination in nuclear spin tomographs comprises at least one test body for abstract imitation of a human or animal body part, and also means for supplying the test body with a liquid during the examination by nuclear spin tomography. Another phantom for examination in nuclear spin tomographs comprises at least one abstract imitation of a human or animal body part, of which at least one abstract imitation is adapted to be an at least partially flexible test body, and a flexible layer surrounding the partially flexible test body to imitate a lipid layer. Methods for producing test bodies include molding the test bodies from plastic material.
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: October 12, 2010
    Assignee: Schleifring und Apparatebau GmbH
    Inventor: Harry Schilling
  • Patent number: 7812604
    Abstract: A thermal management system for cooling a heat generating component of a Magnetic Resonance Imaging (MRI) apparatus includes at least one heat pipe having a portion disposed proximate the heat generating component, such as a gradient coil and/or RF coil. When heat is removed from the component, a working fluid in a relatively hotter end of the heat pipe vaporizes and travels toward a relatively colder end of the heat pipe. The colder end may be operatively coupled to a heat sink for removing the heat from the colder end and increase the overall efficiency of the system. The heat pipe may be disposed along a horizontal, a vertical direction and/or along a diagonal of the heat generating component.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: October 12, 2010
    Assignee: General Electric Company
    Inventors: Tunc Icoz, Mehmet Arik, Yogen Vishwas Utturkar, Bruce Courtney Campbell Amm
  • Patent number: 7812607
    Abstract: In one aspect, a magnet comprising a pair of pole supports spaced apart from one another and extending in a generally horizontal direction. The magnet includes a pair of flux return members extending between the pole supports so as to define a frame, each of the flux return members including a first columnar section that extends parallel to the polar axis and a second columnar section that extends perpendicular to the polar axis and projects towards the pole. In another aspect, a magnetic resonance imaging system comprises a ferromagnetic frame that is operative to support an upper pole member and a lower pole member along a vertical polar axis such that a gap is defined between the upper and lower pole members and an access floor that is isolated from the ferromagnetic frame and pole members for providing access to the gap.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: October 12, 2010
    Assignee: Fonar Corporation
    Inventors: Raymond V. Damadian, William H. Wahl, Hank Hsieh, Gordon T. Danby, John W. Jackson, Jevan Damadian, Luciano B. Bonanni, Mark Gelbien, Keith Saboe
  • Patent number: 7808241
    Abstract: A vertical magnetic field type MRI apparatus is capable of high-speed-imaging a large cross section such as a whole human body while suppressing an increase in the number of channels and maintaining sensitivity to a deep portion of a subject to be high. A receiving coil is composed of a plurality of sub coils. A first sub coil (3-1) of the receiving coil is arranged in a first plane (1001) including an axis substantially parallel to the direction of a static magnetic field and forms a first current loop around the surface of the subject. A second sub coil (5-1) of the receiving coil is constituted by a pair of conductor loops (5-2, 5-3) that sandwich the subject in the vicinities of the surface of the subject and are arranged substantially symmetrically each other. The conductor loops have respective cross points (5-4, 5-5). The conductor loops are arranged with the first sub coil to ensure that the cross points are located in the first plane in which the current loop of the first sub coil is provided.
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: October 5, 2010
    Assignees: Hitachi, Ltd., Hitachi Medical Corporation
    Inventors: Masayoshi Dohata, Hisaaki Ochi, Yoshiyuki Miyamoto
  • Patent number: 7808243
    Abstract: A circulator has a ferrite, and the circulator is arranged in the vicinity of a device that produces a static magnetic field in the environment surrounding the device, this static magnetic field giving the circulator a non-reciprocal behavior, with respect to circulation of energy among the gates of the circulator, as a result of interaction of the ferrite with the static magnetic field. A magnetic resonance apparatus embodies such a circulator, and the basic field magnet of this magnetic resonance apparatus generates the static magnetic field.
    Type: Grant
    Filed: January 22, 2007
    Date of Patent: October 5, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Peter Feld, Georg Rauh, Wilfried Schnell, Markus Vester
  • Patent number: 7808239
    Abstract: A magnetic resonance imaging apparatus includes an imaging condition setting unit and an image acquisition unit. The imaging condition setting unit includes an input part for inputting an imaging condition with applying plural pre-pulses. The image acquisition unit performs imaging according to the imaging condition and generates an image based on data acquired by the imaging. The imaging condition setting unit includes a display part configured to display an application region and attribute information of at least one pre-pulse of the plural pre-pulses together with a position of the imaging.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: October 5, 2010
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventor: Mitsue Miyazaki
  • Patent number: 7804300
    Abstract: A radio frequency coils array includes a plurality of conductive RF loops (62a, 62b, 62c, 62d, 162a, 162b, 262a, 262b, 362a, 362b, 362c, 462a, 462b, 462c, 562a, 562b) configured to excite or receive magnetic resonance signals, and a plurality of electronics modules (64a, 64b, 64c, 64d, 164a, 164b, 264a, 264b, 364a, 364b, 364c, 464a, 464b, 64c, 564a, 564b) corresponding to the plurality of conductive RF loops. The electronics modules are grouped together in a compact electronics region (66, 166, 266, 366, 466, 66). Each RF coil is operatively connected with a corresponding electronics module. Each electronics module includes at least a pre-amplifier.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: September 28, 2010
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Cecilia Possanzini
  • Patent number: 7804297
    Abstract: Pulse sequences are applied to a fluid in an earth formation in a static magnetic field and NMR spin echo signals are obtained. The signals are inverted to give T2 distributions at a plurality of depths. Similarities between logs of the T2 bins with resistivity and/or gamma ray logs are used to identify and subtract contributions to the NMR signal from oil. having internal gradients. From the received signals, relaxation and diffusion characteristics of the fluid are determined. The determination takes into account the internal field gradients. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: September 28, 2010
    Assignee: Baker Hughes Incorporated
    Inventor: Pedro Antonio Romero
  • Patent number: 7804298
    Abstract: In the IR (Inversion Recovery) method, to observe a phenomenon in which a nuclear spin returns to a steady state, a 90-degree pulse is irradiated after a lapse of time ? after finishing applying a 180-degree pulse. An FID signal starts being processed after a lapse of reception delay time Dd after finishing applying the 90-degree pulse. Among the FID signals from protons in a plurality of environments in a solid sample, an FID signal high in time-dependent attenuation rate almost disappears during the lapse of reception delay time Dd. Therefore, an FID signal of a proton in an environment intended to be measured can be easily selected and extracted from FID signals of other protons.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: September 28, 2010
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Iwao Miura, Masahiro Miyake
  • Patent number: 7804299
    Abstract: A preparatory pulse sequence is applied prior to an imaging pulse sequence during a diffusion-weighted MRI scan. The preparatory pulse sequence diffusion weights the longitudinal magnetization using a gradient waveform that is first moment nulled to reduce image artifacts caused by patient motion.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: September 28, 2010
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Scott B. Reeder, Reed Busse, Jean H. Brittain
  • Patent number: 7800370
    Abstract: A receiver coil array for a magnetic resonance imaging system has an inductive coupling coil incorporated in the middle coil unit of the receiver coil array as its secondary coil, which serves to regulate the frequency and impedance of the middle coil unit. The secondary coil has an output regulation circuit which can output the magnetic resonance signals received by the middle coil unit to increase the number of the coil units in the receiver coil array that receive and output resonance signals while further regulating the frequency and impedance of the middle coil unit. Since this receiver coil array achieves regulation of the frequency and impedance of the middle coil unit and increases the number of the coil units in the receiver coil array that receive and output the resonance signals, it can improve the quality of the signals received by the receiver coil array. Moreover, the design is simple and is easy to achieve.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: September 21, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jian Jun Du, Jian Zhong Li, Jian Hua Pei, Yao Xing
  • Patent number: 7800367
    Abstract: A method for generating a susceptibility (or T2*) weighted magnetic resonance (MR) image includes defining a pulse sequence having a plurality of gradient echoes and acquiring MR data for each of the plurality of gradient echoes. A weighting function is applied to image data for each gradient echo such as MR data (e.g., k-space data) or magnitude images associated with each gradient echo. A susceptibility weighted image is generated by combining the image data for each gradient echo based on at least the application of the weighting function.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: September 21, 2010
    Assignee: General Electric Co.
    Inventors: Ravi Bhardwaj, Anthony T. Vu, Ramesh Venkatesan
  • Patent number: 7800369
    Abstract: Remote adjustment of a selected one of a plurality of adjustable NMR probe circuit components is achieved with a plurality of selectable linear actuators, the selected one of which urges a platen against a respective driven gear, azimuthally locked to its shaft, to displace it axially along that shaft. When the driven gear engages a driving gear a single driving motor is energized and controlled to effect the desired adjustment.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: September 21, 2010
    Assignee: Varian, Inc.
    Inventors: Xiao Zhang, John S. Tobias
  • Patent number: 7800366
    Abstract: Three-dimensional MR motion estimation on a single image plane based on tagged MRI and HARP processing. Tagged magnetic resonance imaging technique encodes and automatically tracks displacement of spatially modulated object in three dimensions, encoding both in plane and through-plane motion in a single image plane without affecting acquisition speed. Post-processing unravels encoding in order to directly track 3-D displacement of points within the image plane throughout image sequence. The invention is particularly suited to use on a heart for tracking and determining myocardial displacement. In one embodiment, an MR pulse sequence extends a slice following complementary spatial modulation of magnetization (CSPAMM) pulse sequence with two small z-encoding gradients immediately before the readouts in successive CSPAMM acquisitions, thereby adding a through-plane encoding from which through-plane motion can be computed from acquired images.
    Type: Grant
    Filed: January 13, 2009
    Date of Patent: September 21, 2010
    Assignee: Johns Hopkins University
    Inventors: Jerry L. Prince, Matthias Stuber, Nael Fakhry Osman, Khaled Zakarya Abd-Elmoniem
  • Patent number: 7795871
    Abstract: A nuclear magnetic resonance (NMR) resonator (1; 31) comprising an inductive section (6) and a capacitive section (6a), wherein the inductive section (6) is band-shaped and surrounds a substantially cylindrical volume under investigation (5), wherein the capacitive section (6a) is formed from one or more discrete capacitor(s) (13; 13a, 13b, 13c, 13d), and wherein the ends (7, 8) of the band-shaped inductive section (6) are connected through one or several capacitor(s) (13; 13a, 13b, 13c, 13d) of the capacitive section (6a), is characterized in that the inductive section (6) is formed from a dielectric flexible foil (2) which is conductively coated on both sides and the ends (7, 8) of the band-shaped inductive section (6) overlap, wherein the outer coating (4) of the inner end (7) is electrically conductingly connected to the inner coating (3) of the outer end (8), with one or more through-connections (10) being provided in the area of the inner end (7) of the band-shaped inductive section (6), and the outer c
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: September 14, 2010
    Assignee: Bruker Biospin GmbH
    Inventors: Diether Maier, Michael Maixner