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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 6441711 | Magnetizing magnet 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 magnet... | 08/27/2002 |
| 6385478 | Magnetic resonance imaging apparatus 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 volumetr... | 05/07/2002 |
| 6377837 | Nuclear magnetic resonance imaging apparatus 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 coil... | 04/23/2002 |
| 6366092 | Magnetic resonance imaging 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 t... | 04/02/2002 |
| 6359279 | Detector for nuclear imaging 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 dimens... | 03/19/2002 |
| 6320379 | Nuclear magnetic resonance apparatus 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 on... | 11/20/2001 |
| 6281773 | Magnetizing magnet 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 magnet... | 08/28/2001 |
| 6275039 | Magnetic resonance pre-polarization apparatus 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... | 08/14/2001 |
| 6208885 | Injector for injection of pre-polarised fluid into a patient for magnetic resonance (MR) measurement 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... | 03/27/2001 |
| 6201247 | Line source for gamma camera 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 ... | 03/13/2001 |
| 6192106 | Field service flashable getter for x-ray tubes 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 envel... | 02/20/2001 |
| 6177675 | Gamma camera system having multi-resolution detectors A gamma camera system includes a rotatable gantry supporting multiple detector heads each capable of receiving radiation from a region of interest of a subject disposed in an examination region. Each of the detector heads include a collimator which substa... | 01/23/2001 |
| 6175116 | Hybrid collimation and coincidence imager for simultaneous positron and single photon imaging A gamma camera includes detector heads disposed about an examination region. A high energy collimator collimates the radiation received by each of the detector heads. Either a positron emitting radionuclide or a positron emitting radionuclide and a single... | 01/16/2001 |
| 6171243 | Combination of collimated and coincidence information for positron imaging A diagnostic imaging system includes oppositely disposed radiation detectors (32, 34) configured to detect coincidence radiation events caused by a substance injected into a subject which generates positron emissions. A coincidence data processor (40) col... | 01/09/2001 |
| 6147353 | Image shift for gamma camera A gamma camera includes first and second detectors which face an examination region. The detectors are rotatable about the examination region and translatable in a direction tangential to the examination region. Translation of the detectors is coordinated... | 11/14/2000 |
| 6123078 | Radionuclide angiographic collimator system A gamma ray collimator for use in a cardiac inspections system is disclosed which resolves energetically unperturbed gamma rays emitted from a patient and removes inelastic scattered gamma rays. A plurality of collimator elements each have walls, with eac... | 09/26/2000 |
| 6111257 | Support assembly for scintillating crystal A gamma camera includes at least one detector assembly 10. The detector assembly includes an array of photomultiplier tubes, a sheet of scintillating crystal material, a sheet of optical glass, and a matrix of mu-metal material. The mu-metal matrix define... | 08/29/2000 |
| 6111410 | Nuclear magnetic resonance imaging apparatus A magnet having a yoke and a pair of poles coupled to the yoke in a spaced apart relationship includes a pair of energization coils in proximity to each of the poles for creating a magnetic field of a desired strength. A pair of prepolarization coils are ... | 08/29/2000 |
| 6108403 | X-ray equalization filter An object (22) is positioned on a patient support (25) between an x-ray source (10) and an x-ray detector assembly (15). The x-ray source (10) is selectively activated to transmit an x-ray beam (20) through an imaging region (32) to the x-ray detector ass... | 08/22/2000 |
| 6079681 | MR compatible neurosurgical positioning apparatus An apparatus (1) for supporting a surgical instrument in the operative environment of an imaging device comprises components all made of a material compatible for use in the operative environment of the imaging device. The components of the apparatus (1),... | 06/27/2000 |
| 6064720 | Magnetic support for removable antiscatter grid In an x-ray imaging system, an x-ray detector assembly includes an x-ray detector and a support assembly secured to the x-ray detector for supporting an antiscatter grid assembly. The x-ray detector preferably includes a matrix of crystal detectors. The s... | 05/16/2000 |
| 6060712 | Scanning line source for gamma camera A gamma camera system includes two or more radiation detector heads and which are mounted opposite each other to a gantry for rotation about a subject. A transmission radiation source assembly is mounted to the front face of at least one of the detectors ... | 05/09/2000 |
| 6044129 | Gas overload and metalization prevention for x-ray tubes An x-ray tube includes an anode, a cathode, and an electrode disposed in an evacuated envelope. The electrode is positioned such that the electrode is remote from an area in immediate proximity to the envelope. An electric field defined by electrode is of... | 03/28/2000 |
| 6041100 | Cooling device for x-ray tube bearing assembly An x-ray tube is disposed within an x-ray tube housing defining a chamber filled with oil or other cooling medium for cooling the x-ray tube. The x-ray tube includes an envelope enclosing an evacuated chamber in which an anode assembly is rotatably mounte... | 03/21/2000 |
| 6011829 | Liquid cooled bearing assembly for x-ray tubes An x-ray tube includes an envelope defining an evacuated chamber in which an anode assembly is rotatably mounted to a bearing assembly and interacts with a cathode assembly for production of x-rays. The bearing assembly includes a bearing housing and a pl... | 01/04/2000 |
| 5998792 | Positron emission tomography with variable detector geometry An imaging apparatus includes a plurality of detector assemblies disposed for rotation about an imaging region. The detector assemblies may be adjusted between at least two relative angular orientations about the imaging region. The relative angular orien... | 12/07/1999 |
| 5999837 | Localizing and orienting probe for view devices A microscope calibrator probe includes a handle, a tool head connected to the handle, a viewable target connected to an end of the tool head opposite the handle, and three or more position signaling devices disposed on the handle for tracking the probe in... | 12/07/1999 |
| 5987960 | Tool calibrator A tool calibrator includes two portions shaped to slidably engage and secure a tool in a desired position. The tool is secured by a series of staggered V shaped grooves on each of the two portions having a known geometrical relationship with a diameter of... | 11/23/1999 |
| 5928147 | Magnetic resonance imaging apparatus In magnetic resonance imaging (MRI) apparatus in which weight considerations and accessibility of the patient result in a magnet 1 with a large bore 2, in order to enable spectroscopy or other activities requiring large magnetic fields to nevertheless be ... | 07/27/1999 |
| 5929446 | Configurable multiple detector nuclear medicine gantry A transformable gamma camera includes detectors mounted for circumferential movement with respect to a rotating gantry. The rotating gantry includes radial bores at desired angular positions about the rotating gantry. The stationary gantry includes a dock... | 07/27/1999 |
| 5923038 | Partial angle tomography scanning and reconstruction A nuclear camera system includes oppositely disposed radiation detectors (10a, 10b) which view an examination region 14 wherein a subject 16 is received therein. During a diagnostic scan, a motor and drive assembly (18) concurrently moves the detectors (1... | 07/13/1999 |
| 5904691 | Trackable guide block A surgical guide for use with an image guided surgery includes first and second surfaces. At least three signaling devices such as infrared emitters are disposed on the first surface, and a cylindrical mounting boss is disposed on the second surface. A gu... | 05/18/1999 |
| 5879300 | Magnetic resonance methods and apparatus A method and coil arrangement for use in magnetic resonance imaging facilitates the examination of a localized region of the body. A plurality of substantially identical saddle coils are disposed about a former. The coils, which define a generally cylindr... | 03/09/1999 |
| 5876338 | Nuclear magnetic resonance imaging apparatus An MR compatible endoscope 1 has associated MR saddle coil 10 mounted on a removeable former 9. The tip 2 of the endoscope has the usual service channels for imaging. The coil 10 provides an additional MR signal. To avoid the need to plug the coil 10 in, ... | 03/02/1999 |
| 5877501 | Digital panel for x-ray image acquisition A detector assembly for x-ray image acquisition includes a flat panel detector array. The detector assembly also includes a rechargeable battery, an analog to digital converter, and an image memory. The battery provides electrical power to the detector as... | 03/02/1999 |
| 5823960 | Imaging systems An imaging system produces an image of an internal part of an object and a representation of a tool, which representation corresponds to the position of the tool with respect to the actual object. An imaging apparatus defines an examination region. After ... | 10/20/1998 |
| 5793045 | Nuclear imaging using variable weighting A camera for use in coincidence imaging includes detectors (10a, 10b) disposed about an examination region (12). Coincidence logic (14) determines whether gamma rays are detected by each of the detectors (10a, 10b) occur within a specified time interval. ... | 08/11/1998 |
| 5747812 | Scatter filter for emission tomography A novel scatter filter for use in positron emission tomography which filters out deflected rays of energy due to Compton scattering which generally have a lower energy. The filter allows most of the undeflected rays to pass through by providing a layer of... | 05/05/1998 |
| 5742056 | Real time pet imaging processor for a single photon gamma camera This invention addresses the practical implementation of PET imaging capability on a conventional gamma camera. The primary subject of this invention is the addition of a real time processor to perform the rebinning calculations and other on-the-fly calcu... | 04/21/1998 |
| 5735795 | Marker for magnetic resonance imaging A marker and probe for use in magnetic resonance imaging includes a vial for insertion within the body. The vial contains a material having a spin-lattice relaxation time less than that of the material of the body in a region being imaged. A coil arrangem... | 04/07/1998 |
