| Patent Number |
Title Of Patent |
Date Issued |
| 6295336 |
X-Ray examination apparatus with dose control |
September 25, 2001 |
| An x-ray examination apparatus comprises an x-ray source for generating an x-ray image and an image analysis system derives brightness variations from the x-ray image and derives a dose control signal dependent on said brightness variations in order to control the x-ray source. The image |
| 6173084 |
Noise reduction in an image |
January 9, 2001 |
| The invention discloses a method of processing an image including the steps of decomposing the image into detail images at successive resolution levels. The detail images at successive resolution levels contain image information at respective spatial scales. Filtering of detail images is |
| 6081722 |
Mobile radio transmission system with channel allocation, utilizing the extended kohonen network |
June 27, 2000 |
| A radio transmission system having a base station and a mobile station is disclosed. A controller dynamically changes in real-time the allocation of channels in response to changes in signal propagation and traffic conditions between the base and mobile stations. The allocation of ch |
| 6049623 |
Directional adaptive noise reduction |
April 11, 2000 |
| An image is processed taking into account the direction of a predominant structure of the image. Said predominant direction is derived from image information in the image. In particular, the covariance matrix having matrix elements depending on products of differences between pixel-value |
| 5987055 |
Spread-spectrum based cellular mobile radio system, and a control arrangement, a radio based sta |
November 16, 1999 |
| A spread-spectrum based cellular mobile radio system resolves average mutual interferences (I.sup.u (j).sub.av, I.sup.d (j).sub.av) between radio zones j, j') from a total interference experienced in a radio zone (j), using statistical methods. First, interference measurements are ca |
| 5835849 |
Cellular mobile radio system comprising sub-cells |
November 10, 1998 |
| A cellular mobile radio systems includes fixed stations and mobile stations, a radio cell being subdivided into sub-cells and each sub-cell being assigned its own allocation of radio channels. The values of radio parameters of the fixed stations are measured and evaluated for assigning |
| 5825846 |
Noise reduction in an image |
October 20, 1998 |
| In a method of processing an image the image is divided in one or more blocks. Separate blocks are spatially frequency transformed in that pixel-values of the blocks are transformed into spectral coefficients. A noise level of the image is estimated and reduced spectral coefficients |
| 5708693 |
Image processing for noise reduction |
January 13, 1998 |
| An image processing method includes multi-resolution decomposition to decompose an input image into frequency-band images, which are subsequently filtered according to an order statistics filtering. Preferably, a finite impulse response median hybrid is employed. The filtered frequen |
| 5519884 |
Cellular mobile radio system utilizing predetermined channel lists |
May 21, 1996 |
| In a cellular mobile radio network a limited number of available channels must be allocated among the various cells, and the efficiency of such allocation is highly variable with changing traffic conditions in the network. To solve this problem the invention determines all possible radio |
| 5475868 |
Cellular radio system having channel evaluation and optimal channel selection via trial use of n |
December 12, 1995 |
| A mobile radio system includes fixed stations and mobile stations, a free channel for establishing connection to a mobile station being selected from a predetermined channel list for each fixed station. The individual station lists are initially assigned in a radio network planning phase |
| 5043664 |
Magnetic resonance spectroscopy method and device for performing the method |
August 27, 1991 |
| In order to suppress a doublet structure in a carbon spectrum due to J-coupling between carbon and hydrogen spins in compounds containing at least one CH group, a first magnetic rf field having a frequency equal to the Larmor frequency of carbon is generated, after which a second magneti |
| 4939461 |
Method of determining the nuclear magnetization distribution, and device for performing the meth |
July 3, 1990 |
| A method of and a system for, determining the nuclear magnetization distribution, where a plurality of sequences act on an examination zone in the presence of a uniform, steady magnetic field, each sequence comprising an r.f. pulse whereby, in conjunction with a magnetic gradient field, |
| 4767990 |
Nuclear magnetic resonance examination method |
August 30, 1988 |
| The invention relates to a nuclear magnetic resonance examination method for the selective excitation of a limited volume of a body under examination, in which the excitation is effected by three successive frequency-modulated pulses the first and the third of which are equal to one |
| 4739266 |
MR tomography method and apparatus for performing the method |
April 19, 1988 |
| The invention relates to a method of generating separate fat images and water images and to an apparatus for performing this method. Separate fat images and water images are obtained by means of a sequence consisting of three high-frequency pulses, the second and the third high-frequency |
| 4707659 |
Method and device for determining an NMR distribution in a region of a body |
November 17, 1987 |
| The method and device for NMR Fourier zeugmatography utilizes amplitude-modulated r.f. pulses (90.degree. and 180.degree. pulses) for the excitation of nuclear spins and the generating of nuclear spin echo signals. For three-dimensional Fourier zeugmatography, r.f. pulse having a lar |
| 4670716 |
NMR tomography apparatus |
June 2, 1987 |
| The invention relates to an MR tomography apparatus, comprising three coil systems for generating a magnetic field which extends in the direction of a steady, homogeneous main field and which varies linearly as a function of the location. In addition, there is provided at least one furth |
