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| Number | Title | Issue Date |
| 7431500 | Dynamic exposure control in radiography A method and system is presented in radiography for optimizing image quality of an object (e.g. an anatomical region of a patient), while minimizing the radiation dose to the patient. X-ray exposure parameters, such as operating voltage (kVp), operating current (mA)... | 10/07/2008 |
| 7409043 | Method and apparatus to control radiation tube focal spot size A method for controlling focal spot size changes of an x-ray source in an imaging system includes measuring focal spot sizes as a function of a plurality of x-ray source operating parameters, determining a calibration table or transfer function utilizing the measure... | 08/05/2008 |
| 7366283 | Method to control anodic current in an x-ray source An apparatus and method for an x-ray system includes an x-ray emitter having a first electrode and a second electrode. A high voltage supply is electrically connected to the first electrode. A power supply is electrically connected to the second electrode. A control... | 04/29/2008 |
| 7340035 | X-ray tube cathode overvoltage transient supression apparatus An imaging tube (30) includes multiple high voltage elements (64). A voltage-clamping device (70) is coupled between the high voltage elements (64) and prevents the occurrence of overvoltage transients in the minor insulation of an imagin... | 03/04/2008 |
| 7327826 | X-ray imaging apparatus and operating method therefor, with subject thickness-dependent use of a scattered ray grid In order to achieve a particularly good image sharpness, in a method and apparatus for radiological imaging of an examination subject, a digital x-ray detector is arranged behind the subject and a scattered-ray grid is positionable between the subject and the x-ray ... | 02/05/2008 |
| 7280635 | Processes and apparatus for managing low kVp selection and dose reduction and providing increased contrast enhancement in non-destructive imaging Systems, processes and apparatus are described through which non-destructive imaging is achieved, with equivalent or increased contrast, in comparison to conventional approaches, and that facilitate reduced dosage of X-rays delivered to the object or patient being i... | 10/09/2007 |
| 7233645 | Systems and methods for controlling an X-ray source A control system for an X-ray source includes a sensor interface for receiving one or more sensor signals representative of operation of the X-ray source; a programmable controller operative in response to the one or more sensor signals and a sequence of control ins... | 06/19/2007 |
| 7215739 | Active dose reduction device and method An active dose radiation device and method decreases the amount of x-rays which may be generated by an x-ray tube following termination of the x-ray exposure. One component of the x-ray system is connected to the device which has a plurality of electronic cells that... | 05/08/2007 |
| 7215733 | X-ray computed tomography apparatus A plurality of region-specific areas are set on a scanogram, and an image SD value is set for each region-specific area. A tube current calculating unit calculates a tube current value at each position on the basis of a tube current pattern in a tube current pattern... | 05/08/2007 |
| 7209539 | Process and device for testing parts by X rays The non-destructive test of a structure (10) such as an aircraft fuselage is done by placing an X-ray source (16) on one side of the structure, and placing a digital camera (24) on the other side. The microcomputer (28) analyzes the image... | 04/24/2007 |
| 7136451 | Method of and system for stabilizing high voltage power supply voltages in multi-energy computed tomography A method of and a system for stabilizing High Voltage Power Supply (HVPS) DC and AC voltages in multi-energy X-ray computed tomography scanners are provided. The method comprises generating filter ratios, computing DC and AC voltages, and feeding back the computed D... | 11/14/2006 |
| 7133495 | X-ray generator An X-ray generator 1 includes an X-ray tube 11 having a cathode portion 16, a grid electrode 15 and a target 22, a voltage controller 27 and 32 for controlling voltages to be applied to the cathode portion 16 a... | 11/07/2006 |
| 7079189 | Image sensing apparatus For providing a longer lifetime and sensing an image with less noise, there is provided an image sensing apparatus having a flat panel sensor for detecting radiations, a first power circuit for supplying an electric power to the flat panel sensor, a read-out circuit... | 07/18/2006 |
| 7079623 | X-ray unit for the generation of brief X-ray pulses and inspection device operating with such an X-ray unit An invention related to an X-ray device for the generation of brief X-ray pulses comprising an X-ray tube having a thermionic cathode and an anode and an X-ray generator having a first circuit for the generation of a high-voltage pulse which is applied to the anode ... | 07/18/2006 |
| 7050539 | Power supply for an X-ray generator A power supply for X-ray generators which includes at least one inverter (11, 12, 13), at least one transformer (111, 121, 131) and at least one voltage cascade (112, 122, 132) for generating a supply voltage for an X-ray tube (15). In or... | 05/23/2006 |
| 7023960 | Method of adjusting the emission rate of radiation from a source of radiation To adjust the emission rate of radiation from an X-ray tube, the value of the current of the X-ray tube is modeled empirically by a second-order polynomial function depending on the heating current and a first-order polynomial function depending on the high voltage.... | 04/04/2006 |
| 7016468 | X-ray tube preheat control A current feedback circuit in a dental imaging apparatus, which measures the x-ray tube current produced by the x-ray filament. During preheat, when the tube current is sensed to be appropriate for production of a constant rate of electrons, preheat is stopped, and ... | 03/21/2006 |
| 7012988 | Method of controlling X-ray and X-ray apparatus therefor The invention relates to a method of controlling an X-ray apparatus containing an X-ray emitter. Control means for the X-ray apparatus are provided with exposure time correction data for given mains voltages and the current mains voltage is measured before and/or du... | 03/14/2006 |
| 6967559 | Transformer for high-voltage X-ray generator A power supply for a device which has a load, comprising a first resonant generator and a second resonant generator, coupled in parallel, each generator having a phase output. The power supply further comprises a control circuit coupled to the first and second gener... | 11/22/2005 |
| 6920201 | X-ray device with a storage for X-ray exposure parameters The invention relates to an X-ray device in which a set of exposure parameters is fetched from among a number of such sets stored in a first storage arrangement for APR X-ray exposures. The exposure parameters which result therefrom during the subsequent X-ray expos... | 07/19/2005 |
| 6850588 | Radiation exposure limiting scheme A method and system for reducing radiation exposure from an imaging system including determining an entry location, operating the imaging system so as to cause the imaging system to emit radiation having a radiation intensity, controlling the radiation intensity in ... | 02/01/2005 |
| 6836534 | High voltage transformer The conventional high voltage elements (1, 8) constituting it are located in such a way that the ground level (2) is situated in the central zone and from this zone the negative potential progressively increases towards one of the ends (3) while... | 12/28/2004 |
| 6826252 | Computed tomography scanner and method for controlling the computed tomography scanner A method for controlling a computed tomography scanner for producing projections of a measurement object is proposed, in which the projections are used to create images of the measurement object. The method has comprises specifying a set-point value (σset-poin... | 11/30/2004 |
| 6810109 | X-ray emitting system and method An x-ray emitting system and method for administering a predetermined x-ray dose rate are provided. The system includes an x-ray emitter, a controller operably connected to the x-ray emitter, a current sensor operably connected to the controller, and a voltage senso... | 10/26/2004 |
| 6510196 | Determination and adjustment of exposure values for X-ray imaging A device for determining exposure values in an X-ray panoramic and/or cephalometric apparatus (20) for imaging patient's head (3). The apparatus comprises adjustable support means (11) provided with support elements (1a, 1b) with a variable spacing (W1) t... | 01/21/2003 |
| 6259767 | X-ray device including an adjustable diaphragm unit The invention relates to an X-ray device which operates with only a single image detection device whose format corresponds to the maximum exposure format. In order to facilitate the adjustment of the exposure field for an exposure, a respective set of exp... | 07/10/2001 |
| 6246746 | X-ray examination apparatus with X-ray image sensor matrix and correction unit An x-ray examination apparatus comprises an x-ray image sensor matrix (1) for deriving an initial image signal from the x-ray image. The sensor elements of the x-ray sensor matrix convert incident x-rays into electric charges. These electric charges are r... | 06/12/2001 |
| 6215842 | Reduction of temporal variations in X-ray radiation An x-ray radiation stabilization system is provided including an x-ray tube (20) which emits x-ray radiation (22). The x-ray tube (20) has an anode (52), a cathode (50), and a vacuum envelope (54) which houses the anode (52) and the cathode (50). A high-v... | 04/10/2001 |
| 5808376 | Method of and apparatus for power management and distribution in a medical imaging system An apparatus for energizing a large scale medical imaging system, preferably in the form of a CT scanner so that the scanner operates off an uninterruptable power supply in the event that the external power falls below sufficient power to operate the syst... | 09/15/1998 |
| 5774625 | Arrangement for monitoring the rotational speed of a rotary-anode drive motor of x-ray The invention relates to an X-ray apparatus, comprising a rotary-anode X-ray tube, a device for monitoring the rotational speed of a rotary-anode drive motor of the X-ray tube, a sensor circuit for determining an angle signal which is dependent on the pha... | 06/30/1998 |
| 5731968 | X-ray apparatus comprising a power supply section for powering an X-ray tube An X-ray apparatus, includes a power supply section for powering an X-ray tube (4) with a high-voltage transformer (3) which has two groups of primary and secondary windings provided on the same transformer core, the coupling between the primary windings ... | 03/24/1998 |
| 5708694 | X-ray generator An x-ray generator wherein the tube current is kept constant independently of the drop in the cathode temperature after the radiation is switched on has a control circuit for the tube filament current in which a correction value that corresponds to the dr... | 01/13/1998 |
| 5664000 | X-ray examination apparatus comprising an exposure control circuit An X-ray examination apparatus includes an exposure control circuit (20) which supplies a control signal for adjustment of the X-ray source (1). The exposure control circuit (20) determines the control signal from an area of the X-ray image in which no ov... | 09/02/1997 |
| 5530735 | On-line measurement of x-ray tube voltage in a CT system A CT system includes a pair of detectors in its detector array which measure x-ray intensity from a source after passing through a differential x-ray filter. The ratio of the signals produced by these two detector elements are input to a KV calculator whi... | 06/25/1996 |
| 5521968 | Call charging method in radio telephone system and radio telephone system employing the same method In a radio telephone system and a call charging method used in this radio telephone system, when a user of a radio telephone issues a telephone call to a public telephone network by utilizing a radio controller installed in a PBX employed on the premises ... | 05/28/1996 |
| 5490196 | Multi energy system for x-ray imaging applications In an all electronic multi energy system at least two levels of x-ray energy are produced sequentially and rapidly at independently controllable and different power or flux levels. In the system there are a triode x-ray tube which selects the operating cu... | 02/06/1996 |
| 5448614 | Fluoroscopic imaging system In an interventional radiography (IVR), for example in a percutaneous transluminal coronary angioplasty (PTCA), when the IVR includes a period in which the movement of the object is slow, a normal X-ray radiating mode (a continuous X-ray radiation or a no... | 09/05/1995 |
| 5432833 | Automatic exposure control system for tomographic applications An automatic exposure control system which regulates the power supplied to an x-ray source of a tomographic apparatus is disclosed. The system includes an x-ray source movably opposing an ionization chamber with a sweeping mechanism and a control for cont... | 07/11/1995 |
| 5426345 | High voltage electronic tube with intermediate electrode A high voltage electronic tube comprises an electrode arrangement comprising an outer electrode formed by a cylindrical metal jacket, an inner electrode supported substantially centrally with respect to said outer electrode by an electrode support arrange... | 06/20/1995 |
| 5400385 | High voltage power supply for an X-ray tube A supply for a high bias voltage in an X-ray imaging system has an inverter and a voltage multiplier that produce an alternating output voltage in response to control signals. A voltage sensor produces a signal indicating a magnitude of the output voltage... | 03/21/1995 |
