| Patent Number |
Title Of Patent |
Date Issued |
| RE36495 |
RF coil identification and testing interface for NMR systems |
January 11, 2000 |
| A movable patient supporting portion (10) of a patient couch (A) includes a socket (26) for receiving a mating plug (24) on a localized coil (B). The patient couch selectively inserts the localized coil and a supported patient into a bore (14) of a cryogenic magnet system (C). The locali |
| RE36047 |
Multi-mode TDI/raster-scan television camera system |
January 19, 1999 |
| Mode selection switches (76, 96, 98) selectively interconnect a sensor line shift timing generator (76) with one of three signal sources - (1) a conventional raster scan timing signal from a raster scan sync generator (70), (2) variable speed external timing signals from a tachometer (32 |
| D345606 |
Medical gamma camera gantry |
March 29, 1994 |
|
| D332312 |
CT scanner control console |
January 5, 1993 |
|
| D322780 |
Computer control panel |
December 31, 1991 |
|
| D314393 |
Daylight film loader |
February 5, 1991 |
|
| D314078 |
Disposable cape for use in mammographic examinations |
January 29, 1991 |
|
| D294173 |
Diagnostic image display console for use with digital radiography, computerized tomography or nu |
February 9, 1988 |
|
| 6441711 |
Magnetizing magnet |
August 27, 2002 |
| A high temperature superconductor (HTSC) 5 is magnetized between drive coils 1,2 forming poles of a magnet connected by an iron yoke 9 by relative movement of a vacuum insulated cryostat 4 containing the HTSC and the magnetizing magnet, in order to magnetize a large area of HTSC using a |
| 6385478 |
Magnetic resonance imaging apparatus |
May 7, 2002 |
| In a magnetic resonance imaging apparatus in which excitation pulses are applied to a restricted region 5 of a magnetic resonance imaging magnet bore, in which the field is uniform, and the data samples collected are Fourier transformed to form a volumetric image of the restricted region |
| 6377837 |
Nuclear magnetic resonance imaging apparatus |
April 23, 2002 |
| A medical instrument, for use in relation to an MR scanner, comprising body portion having mounted thereon a plurality of positioning elements each of which comprises a reservoir containing a liquid and at least two spaced tuned MR auxiliary receiver coils positioned coaxially with respe |
| 6366092 |
Magnetic resonance imaging |
April 2, 2002 |
| In magnetic resonance imaging apparatus having a resistive electromagnet with a bore 6, r.f. excitation pulse substantially simultaneously excites a number of slices A to D which are phase encoded and frequency encoded in the usual way, the direction of the main field being along the bor |
| 6359279 |
Detector for nuclear imaging |
March 19, 2002 |
| A radiation detector includes slit collimator. A radiation detector receives radiation which has been received in each of the slits. The aspect ratio of the detector is approximately three, and each semiconductor radiation detector has a transverse dimension which is less than that o |
| 6340887 |
Multiple contrast FSE approach to black blood angiography with redundant and supplementary vascu |
January 22, 2002 |
| A black blood magnetic resonance angiogram is produced by exciting dipoles (52) and repeatedly inverting the resonance (54.sub.1, 54.sub.2, . . . ) to produce a series of magnetic resonance echoes (56.sub.1, 56.sub.2, . . . ). Early echoes (e.g., (56.sub.1, . . . , 56.sub.8)) are more he |
| 6339652 |
Source-assisted attenuation correction for emission computed tomography |
January 15, 2002 |
| A method of ML-EM image reconstruction is provided for use in connection with a diagnostic imaging apparatus (10) that generates projection data. The method includes collecting projection data, including measured emission projection data and measured transmission projection data. Opt |
| 6327327 |
Multi-channel segmented slip ring |
December 4, 2001 |
| A computerized tomography system includes a stationary section (A) and a rotating section electrically linked by at least one interconnecting slip ring (D). On one side the slip ring (D) is configured as a series of electrically conductive segments (20A-20H) separated by non-conductive |
| 6323649 |
Modular MRI gradient amplifier using unipolar PWM drive |
November 27, 2001 |
| A gradient amplifier (20), for driving a gradient coil (22) of an MRI scanner, includes a plurality of first modules (60). The first modules (60) provide unipolar PWM control of an input supplied thereto to generate a unipolar waveform. A high voltage DC power supply (64) electrically |
| 6320385 |
Multi-channel balun for magnetic resonance apparatus |
November 20, 2001 |
| A multi-channel balun (70, 72) blocks stray RF current from flowing on shield conductors of coaxial RF cables of a magnetic resonance apparatus. The balun comprises a parallel combination of an even number of helical coils of shielded transmission cable (L10, L12; L14, L16, L18, L20) wou |
| 6320379 |
Nuclear magnetic resonance apparatus |
November 20, 2001 |
| A probe 1, for use with magnetic resonance imaging apparatus, which is designed to be inserted into and removed from a patient and which comprises a former 2 upon which an r.f. coil 3 is mounted is characterised in that the former also carries at least one transducer or sensor 6-9 by |
| 6314311 |
Movable mirror laser registration system |
November 6, 2001 |
| A registration system (200) for use in connection with an image guided surgery system (10) is provided. It includes a medical diagnostic imaging apparatus (100) for collecting image data from a subject (310). An image data processor (130) reconstructs an image representation of the subje |
| 6313629 |
Prescan calibration of spatially dependent data errors in single echo sequences |
November 6, 2001 |
| A method of magnetic resonance imaging includes subjecting a number of regions of an object being imaged to a magnetic resonance calibration pulse sequence. Each calibration pulse sequence generates a single calibration echo. Each of the calibration echoes are collected and therefrom |
| 6310968 |
Source-assisted attenuation correction for emission computed tomography |
October 30, 2001 |
| A method of ML-EM image reconstruction is provided for use in connection with a diagnostic imaging apparatus (10) that generates projection data. The method includes collecting projection data, including measured emission projection data. An initial emission map and attenuation map are |
| 6307373 |
Anti-aliasing transmitter coil array for magnetic resonance |
October 23, 2001 |
| In a magnetic resonance imaging apparatus 1 there is a region of good i.e. uniform field between A and B but, where the field falls off, say, at D, the r.f. excitation pulse can produce an alias image of D which overlies the desired image of say, B. To reduce this effect, the r.f. excita |
| 6294916 |
NMR and ESR probes for closed loop control of gradient fields |
September 25, 2001 |
| Magnetic resonance imaging apparatus uses magnetic field gradients X, Y, Z to spatially encode the magnetic signals arising from a patient on a couch 2 in bore 1 of a main magnet. Thermal stresses arising from aggressive gradients during multiple acquisitions result in imperfectly repeat |
| 6281773 |
Magnetizing magnet |
August 28, 2001 |
| A high temperature superconductor (HTSC) 5 is magnetized between drive coils 1,2 forming poles of a magnet connected by an iron yoke 9 by relative movement of a vacuum insulated cryostat 4 containing the HTSC and the magnetizing magnet, in order to magnetize a large area of HTSC using a |
| 6278276 |
Phased array gradient coil set with an off center gradient field sweet spot |
August 21, 2001 |
| A gradient coil assembly (22) generates substantially linear gradient magnetic fields through an examination region (14). The gradient coil assembly (22) includes a pair of primary gradient coil sets (22a, 22b) and a pair of shield coil sets (23a, 23b) which are disposed in an overlappin |
| 6278275 |
Gradient coil set with non-zero first gradient field vector derivative |
August 21, 2001 |
| A gradient coil assembly (22) generates substantially linear magnetic gradients across the central portion of an examination region (14). The gradient coil assembly (22) includes primary x, y, and z-gradient coils (62, 66, 68) which generate a gradient magnetic field (90) having a no |
| 6276145 |
Aerostatic CT suspension |
August 21, 2001 |
| A CT scanner (10) for obtaining a medical diagnostic image of a subject includes a stationary gantry (12), and a rotating gantry (16) rotatably supported on the stationary gantry (12) for rotation about the subject. A fluid bearing (18) is interposed between the stationary and rotating |
| 6275039 |
Magnetic resonance pre-polarization apparatus |
August 14, 2001 |
| Interventional MRI imaging leads to the development of open magnets such as for example C-magnet 1, in which it is correspondingly more difficult to generate a large field in order to obtain a good signal-to-noise ratio. To overcome this, a pre-polarizing unit 7 is provided which utilize |
| 6262576 |
Phased array planar gradient coil set for MRI systems |
July 17, 2001 |
| A uniplanar gradient coil assembly (40) generates substantially linear gradient magnetic fields through an examination region (14). The gradient coil assembly (40) includes at least a pair of primary uniplanar gradient coil sets (40a, 40b) and a pair of shield coil sets (41a, 41b) which |
| 6255820 |
Variable bandwidth MRI data collection |
July 3, 2001 |
| The present invention is directed to an MRI apparatus. It includes a main magnet 12 that generates a substantially uniform temporally constant main magnetic field, B.sub.0, through an examination region 14 wherein an object being imaged is positioned. A magnetic gradient generator produc |
| 6252400 |
Spin and field echo (safe) FSE |
June 26, 2001 |
| The present invention is directed to an MRI apparatus including a main magnet (12) that generates a substantially uniform temporally constant main magnetic field, B.sub.0, through an examination region (14) wherein an object being imaged is positioned. A magnetic gradient generator p |
| 6236708 |
2D and 3D tomographic X-ray imaging using flat panel detectors |
May 22, 2001 |
| A penetrating radiation source (14) is disposed on one side of a object (10) which is on a object support (12). A flat panel radiation detector (18) is stationarily disposed on the opposite side of the object (10) than the source (14). A moving system (16, 50, 52) moves the source (14) w |
| 6236203 |
Super shielding of finite length structures in open magnetic and electric systems |
May 22, 2001 |
| Methods of designing an active shield for substantially zeroing an electro-magnetic field on one side of a predetermined boundary in open magnetic resonance imaging systems and in open electric systems are provided. The methods include defining a finite length geometry for a primary |
| 6229870 |
Multiple fan beam computed tomography system |
May 8, 2001 |
| A CT scanner includes a stationary gantry (A) defining an examination region (12) and a rotating gantry (C) which rotates about the examination region. Multiple fan beam generators (B), each capable of producing a beam of radiation directed through the examination region, are mounted to |
| 6222902 |
Real-time tomographic system with flat panel detectors |
April 24, 2001 |
| An object (14) is positioned on an object support (16). A radiation source (10) projects a beam of radiation through a region of interest (12) of the object. A plurality of focal planes (F.sub.1, F.sub.2, . . . , F.sub.n) mark the center of selected slice images through the region of int |
| 6219572 |
Imaging using a contrast agent |
April 17, 2001 |
| When imaging a region of a patient using a contrast agent, for example in magnetic resonance imaging apparatus including a superconducting magnet 2, it is usual to take an image before and after injection of a contrast agent from an injector 5 into the patient. The invention provides a s |
| 6218838 |
MRI magnet with high homogeneity, patient access, and low forces on the driver coils |
April 17, 2001 |
| A pair of annular magnets (10) generate a vertical magnetic flux field through an imaging volume (12). The flux is focused by a pair of Rose rings (26) of high cobalt steel. A high order shim set includes a plurality of permanently magnetized or magnetized iron rings (32a, 32b, 32c, |
| 6211677 |
Lung coil for imaging hyper-polarized gas in an MRI scanner |
April 3, 2001 |
| In a magnetic resonance imaging apparatus, a whole-body RF coil (42) disposed circumferentially around an examination region (14) is tuned to a first Larmor frequency, e.g., that of hydrogen. A first transmitter (44) transmits RF signals at the first Larmor frequency. A first T/R switch |
| 6211523 |
Autocontouring device for gamma camera using radioactive source and transverse motion |
April 3, 2001 |
| A nuclear medicine gamma camera for diagnostic imaging includes a rotating gantry (16) which defines a subject receiving aperture (18). A support (10) supports a subject (12) being examined within the subject receiving aperture (18). A plurality of detector heads (20a-c) is movably attac |
| 6208885 |
Injector for injection of pre-polarised fluid into a patient for magnetic resonance (MR) measure |
March 27, 2001 |
| A patient bed (1) of an MR imaging apparatus is provided with a tube (17) through which pre-polarised fluid can be injected into a patient in order to improve contrast when imaging veins, arteries or other vessels in the body. Fluid is delivered from pump (2) into a high field polarising |
| 6208706 |
Method and apparatus to increase the operational time of a tomographic scanner |
March 27, 2001 |
| A CT scanner includes a stationary gantry (10) defining an examination region (12) and a rotating gantry (16) which rotates about the examination region. At least two x-ray tubes (18a, 18b), each capable of producing a beam of radiation directed through the examination region, are mounte |
| 6208144 |
Magnetic resonance operating room magnet |
March 27, 2001 |
| A region of interest of a subject (20) on a subject support (18) is positioned above a ferrous pedestal (16, 116) that is supported on a ferrous floor yoke portion (76, 176). A lower imaging coil assembly (50) including a lower gradient coil (52), a radio frequency coil (54), and a l |
| 6208141 |
Method and apparatus for mounting gradient tube to diagnostic imaging device |
March 27, 2001 |
| A diagnostic imaging apparatus such as a magnetic resonance imaging (MRI) device includes a vacuum vessel (24) having a central helium reservoir (16) in which superconducting magnetic coil windings (10) are maintained at a superconducting temperature. The vacuum vessel defines a bore (12 |
| 6205347 |
Separate and combined multi-modality diagnostic imaging system |
March 20, 2001 |
| A multi-modality diagnostic imaging system includes a first imaging subsystem (A), such as a computed tomographic (CT) system, for performing a first imaging procedure on a subject. A second imaging subsystem (B), such as a nuclear medicine system (NUC), performs a second imaging pro |
| 6201247 |
Line source for gamma camera |
March 13, 2001 |
| A transmission radiation source assembly suitable for use in both SPECT and PET imaging includes a line source assembly having a medium energy transmission source. The line source assembly includes a primary collimator rotatably disposed about the medium energy transmission source. T |
| 6200024 |
Virtual C-arm robotic positioning system for use in radiographic imaging equipment |
March 13, 2001 |
| A virtual C-arm support system 40 is used in a radiographic imaging apparatus of the type including an x-ray source 44 and an x-ray detector 48. The support system includes a first positioning system 42 operatively connected to the x-ray source for selectively positioning the x-ray sourc |
| 6198961 |
Interventional radio frequency coil assembly for magnetic resonance (MR) guided neurosurgery |
March 6, 2001 |
| A diagnostic imaging apparatus such as a magnetic resonance imaging (MRI) device includes a gradient coil assembly (34) and an RF coil (36) disposed proximate pole faces (30, 32). An interventional head coil assembly (40) includes a base (90), a head frame housing (96) including at least |
| 6198288 |
High power, multiple-frequency transmit-receive switch in magnetic resonance imaging |
March 6, 2001 |
| A magnetic imaging apparatus includes an RF coil (F) in electrical communication with an RF signal generator (C) and a receiver (G) through an interface circuit (E). The signal generator transmits resonance excitation signals at one of at least two resonance frequencies, e.g. the res |
| 6192106 |
Field service flashable getter for x-ray tubes |
February 20, 2001 |
| An evacuated tube (24) includes an envelope (50) and an electrode (78) in the tube envelope (50). The electrode (78) is electrically connected to conductors (74a, 74b) that extend through the tube envelope (50). A getter (72) is included in the tube envelope (50) and is electrically conn |
