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| Number | Title | Issue Date |
| 6226545 | RF coil structure for intra-cavity use in magnetic resonance imaging An RF coil structure for intra-cavity use includes a pair of conductors (7, 8) separated by a support such as a web (9) which come together at positions separated along the length of the coil structure such as (A, B). Previous coils have included two para... | 05/01/2001 |
| 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 |
| 6137109 | Autonomous tangential motion control in a multi-detector gamma camera The configuration of a multi-head gamma camera requires coordination between tangential and radial motions so that the detectors maintain a desired orientation, either corner to corner or overlapping. Based on the radial and angular positions of the detec... | 10/24/2000 |
| 6125169 | Target integral heat shield 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 x-ray tube further includes a heat shield disposed i... | 09/26/2000 |
| 6114701 | 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... | 09/05/2000 |
| 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 |
| 6081336 | Microscope calibrator A microscope calibrator includes a housing supporting a series of focusing targets each situated at a predetermined distance from one another. Attributes of the microscope are determined by focusing the microscope on one ore more of the focusing targetrs ... | 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 |
| 6005918 | X-ray tube window heat shield An x-ray tube includes an envelope defining an evacuated chamber and having a window transmissive to x-rays. An anode assembly and a cathode assembly operate within the envelope to produce x-rays which travel through the window transmissive to x-rays towa... | 12/21/1999 |
| 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 |
| 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 |
| 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 |
| 5978447 | X-ray tube straddle bearing assembly A rotating assembly 79 includes an anode assembly 55 coupled to a shaft 70 and a rotor 75 including a rotor body 77. The anode assembly 55 includes an elongated neck portion 58 and is rotated via the shaft 70 about an axis of rotation 65 in an x-ray tube ... | 11/02/1999 |
| 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 |
| 5882304 | Method and apparatus for determining probe location A magnetic probe (1) for use with a magnetic resonance imaging apparatus comprises an electron spin resonance (ESR) magnetometer. The position of the probe (1) tracked by measuring the resonant frequency of an ESR sample (32) in the probe. The resonant fr... | 03/16/1999 |
| 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 |
