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| Number | Title | Issue Date |
| 5877665 | Thermally passive magnet mounting system for an MRI signa profile magnet in mobile trailer van In a mobile magnetic resonance imaging van, the challenge is to design a magnet mounting system such that the top and bottom poles of the magnet are within magnet temperature gradient specifications for good image quality. The present invention provides s... | 03/02/1999 |
| 5841835 | Apparatus and method for automatic monitoring and assessment of image quality in x-ray systems An image quality test phantom tool is provided for use in the calibration and standardization of digital x-ray fluoroscopy and radiography systems. A composite phantom has a base for providing mechanical stability, a mesh with a central cut-out overlaid o... | 11/24/1998 |
| 5838762 | Rotating anode for x-ray tube using interference fit A method for assembling a rotating X-ray tube structure ensures balance retention during the life of the tube. The X-ray tube structure has a cathode for emitting electrons, and a rotor and a bearing assembly for facilitating rotation of an anode. At leas... | 11/17/1998 |
| 5795207 | Glass to metal interface X-ray tube A method is used for interfacing dissimilar materials in an X-ray tube. The X-ray tube includes a rotor assembly to distribute heat generated in the X-ray tube. The X-ray tube is sealed within a glass material which has a first expansion coefficient. An i... | 08/18/1998 |
| 5761376 | System and method of motor control A method and system are provided for controlling a motor to rapidly accelerate and synchronize with an external synchronization pulse. First, the motor is accelerated to only half of the desired speed. At this point, the phase error with the sync pulse is... | 06/02/1998 |
| 5657400 | Automatic identification and correction of bad pixels in a large area solid state x-ray detector A method for identifying and correcting bad pixels in an x-ray image produced by a large area solid state x-ray detector is disclosed. Initially, each bad pixel is identified. An appropriate correction scheme is then selected from a predetermined list. A ... | 08/12/1997 |
| 5642853 | Method for bonding steel to copper A method is used to bond dissimilar metals, such as for an x-ray tube. Copper and steel tubular components are provided. An interlayer material situated between the metal layers is used to bond the copper and steel tubular components by solid state diffus... | 07/01/1997 |
| 5621781 | X-ray tube A rotating X-ray tube comprises a cathode assembly including a cathode and a cathode current supply, and an anode assembly having an anode current controlled via the cathode current supply. A filament for emitting electrons is separated from the cathode. ... | 04/15/1997 |
| 5610509 | Method for optimizing power supply voltage to high voltage transmitters A transmit power supply optimization method optimizes power supply voltage to high voltage transmitters of an ultrasound imaging apparatus for each operating mode of the apparatus. The method comprises the steps of linking the operating mode of the appara... | 03/11/1997 |
| 5604347 | Method and means for compensating for row variable offsets in a large area solid state x-ray detector Row variable offsets in a large area solid state x-ray detector are compensated for. Initially, a calibration is performed to determine the row variable offsets. The calibration is achieved by measuring the average offset of each row. During normal operat... | 02/18/1997 |
| 5592525 | Method for making a rotating anode with an integral shaft A method for making a rotating X-ray tube provides a rotating anode having an integral stem. Initially, a cathode which emits electrons is provided. Next, a preheated anode target which radiates x-ray in response to bombardment by the electrons is provide... | 01/07/1997 |
| 5574764 | Digital brightness detector A brightness detector is used to control the x-ray exposure and the displayed image level in a diagnostic x-ray imaging system. Initially, a region of interest of an image is specified. The average pixel value within the specified region of interest of th... | 11/12/1996 |
| 5568810 | Ultrasound coupling medium warmer and storage means A container of ultrasound coupling medium, used in conjunction with an ultrasound imaging system, is stored for operator convenience and patient comfort. Initially, at least one location on the ultrasound imaging system is identified, which has a predeter... | 10/29/1996 |
| 5530362 | Method and system for determining exams remaining in battery powered mobile x-ray devices A mobile x-ray unit operates from a rechargeable battery in a number of different modes which draw current from the battery. The present invention determines the number of patient exams remaining in the mobile x-ray unit, and has the capability of monitor... | 06/25/1996 |
| 5529071 | Increasing dynamic range with a barrel shifter A method for increasing dynamic range of ultrasound imaging signals uses a barrel shifter. The barrel shifter shifts large bit two's complement input data into a standard size bit two's complement output. The method, then, comprises the steps of reducing ... | 06/25/1996 |
| 5509415 | Method for reducing vector density based on image size In a method for maximizing frame rate of an ultrasound imaging apparatus, ultrasound B and color mode vector density are reduced. Initially, an actual displayed image size is determined. A minimum vector density requirement is then determined for B which ... | 04/23/1996 |
| 5501223 | Dynamic firing sequence for ultrasound imaging apparatus A dynamic firing sequence for ultrasound imaging apparatus can be achieved in accordance with the present invention. Initially, operator selected parameters are provided and predetermined system constants are stored. The operator selected parameters in B ... | 03/26/1996 |
| 5501221 | Time gain compensation implementation A time gain compensation technique is applicable for use with ultrasound imaging systems, including systems having digital architecture. The time gain compensation apparatus of the present invention comprises a time gain compensation curve generator and t... | 03/26/1996 |
| 5501220 | Digital generation of a dynamic apodization correction A dynamic apodization gain correction technique for use with ultrasound imaging systems comprises an apodization curve generator and the ability to drive the curve generator to provide digital generation of the apodization gain correction curve. The abili... | 03/26/1996 |
| 5482046 | Acoustic power control technique An acoustic power control technique computes relevant system transmit parameters in real-time by optimally combining a current system imaging configuration with an empirically derived measurement database. The database contains measurement information tha... | 01/09/1996 |
| 5467770 | Color adaptive frame averaging A color adaptive frame averaging method for an ultrasound imaging system adds persistence to images. The color adaptive frame averaging is achieved by computing filter weighting coefficients and using the filter weighting coefficients to compensate for al... | 11/21/1995 |
| 5465720 | Automated qualitative image quality for ultrasound images An automated qualitative image quality method is used for an ultrasound imaging system. Initially, an impulse response of the system is determined. The impulse response is used with a cystic filling determination to achieve automated qualitative image qua... | 11/14/1995 |
| 5458129 | Doppler dead zone avoidance A doppler dead zone avoidance method is used in an ultrasound imaging apparatus to avoid the situation where time of flight equals PRI, or the time between doppler firings. Initially, range gate size and transmit parameters are optimized. This optimizatio... | 10/17/1995 |
| 5452338 | Method and system for real time offset correction in a large area solid state x-ray detector Offset signals are removed from an incoming x-ray image produced by a large area solid state x-ray detector. A sequence of incoming dark images from the detector, when the detector is not exposed to x-rays, is recursively filtered to generate a low-noise,... | 09/19/1995 |
| 5438995 | Method for obtaining temporal equity with varying vector locations In a method for obtaining temporal equity of multiple images for ultrasound imaging equipment, a vector set is determined for each of the multiple images, representative of vectors to be aligned. A plurality of independent weights is then calculated for e... | 08/08/1995 |
| 5386451 | Anode potential stator design The motor efficiency of a rotating X-ray tube having an anode assembly and a cathode assembly, can be greatly improved. The improved efficiency x-ray tube motor comprises a stator and rotor assembly having an air gap between the stator and rotor. The impr... | 01/31/1995 |
