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Dan Xu
Dan Xu, Schenectady, NY US
| Patent application number | Description | Published |
|---|---|---|
| 20110052022 | SYSTEM AND METHOD OF DATA INTERPOLATION IN FAST KVP SWITCHING DUAL ENERGY CT - A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, an x-ray source coupled to the gantry and configured to project x-rays through the opening, a generator configured to energize the x-ray source to a first kVp and to a second kVp to generate the x-rays, and a detector having pixels therein, the detector attached to the gantry and positioned to receive the x-rays. The system includes a computer programmed to acquire a first view dataset and a second view dataset with the x-ray source energized to the first kVp, interpolate the first and second view datasets to generate interpolated pixels in an interpolated view dataset at the first kVp, using at least two pixels from each of the first and second view datasets to generate each interpolated pixel in the interpolated view dataset, and generate an image of the object using the interpolated view dataset. | 03-03-2011 |
Dan Xu, Niskayuna, NY US
| Patent application number | Description | Published |
|---|---|---|
| 20110026668 | Apparatus and Method for Voltage Modulation in X-Ray Computed Tomography - The present invention discloses a computed tomography imager comprising: an x-ray source disposed in a gantry; a detector assembly for receiving an x-ray emission from an x-ray source, the x-ray source and the detector assembly rotatable about an imaging target; an imager control system for selectively modulating a kVp operating value in the x-ray source during a scan slice in accordance with an x-ray modulation software program; and a computer for receiving data from the detector assembly, and for providing control signals to the imager control system by executing the x-ray modulation software program for at least a portion of the total possible rotational scanning range of the x-ray source. | 02-03-2011 |
Dan Xu, Oconomowoc, WI US
| Patent application number | Description | Published |
|---|---|---|
| 20100264926 | SYSTEM AND METHOD FOR PHASE RELAXED RF PULSE DESIGN - Techniques for designing RF pulses may be configured to produce improved magnitude profiles of the resulting magnetization by relaxing the phase constraint and optimizing the phase profiles. In one embodiment, a spinor-based, optimal control, optimal phase technique may be used to design arbitrary-tip-angle (e.g., large and small tip angle) RF pulses (both parallel transmission and single channel). In another embodiment, small tip angle RF pulses (both parallel transmission and single channel) may be designed using a small-tip-angle (STA) pulse design without phase constraint that is formulated as a parameter optimization problem. | 10-21-2010 |
| 20110241672 | APPARATUS AND METHOD FOR PARALLEL TRANSMISSION OF RF PULSES IN A SPIN ECHO SEQUENCE - A method, system, and apparatus including a magnetic resonance imaging (MRI) apparatus that includes an MRI system having a plurality of gradient coils, a radio-frequency (RF) transceiver system, an RF switch controlled by a pulse module to transmit RF signals to an RF coil assembly, and a computer. The computer is programmed to implement a spin echo sequence to acquire magnetic resonance (MR) data, where the spin echo sequence includes an excitation RF pulse and at least one refocusing pulse per repetition time (TR) of the excitation pulse. The computer is also programmed to transmit at least two component RF pulses in parallel channels during implementation of the spin echo sequence to produce a first refocusing RF pulse and programmed to reconstruct an image from spin echo sequence image data. | 10-06-2011 |
Dan Xu, Fujisawa JP
| Patent application number | Description | Published |
|---|---|---|
| 20090264134 | RADIO ACCESS TERMINAL, BASE STATION CONTROLLER, AND HANDOFF CONTROL METHOD IN RADIO COMMUNICATION SYSTEM - In a radio communication system wherein radio frequencies for communicating with a radio terminal are different in radio base stations, a table in which positional information, information on the frequency used for transmission/reception to/from the terminal, and a decision condition in a handoff operation are stored as to each base station is prepared in a base station controller beforehand. When the positional information is received from the radio terminal, the base station controller selects the base station being a handoff candidate, on the basis of the positional information of the radio terminal, the positional information of each base station and the decision condition of the handoff operation with reference to the table, and it transmits a handoff request message which contains the information on the frequency of the base station being the handoff candidate, to the radio terminal through the base station communicating with the radio terminal. | 10-22-2009 |
| 20100046359 | Wireless Terminal, Base Station and Channel Characteristic Estimating Method - In a wireless communication system based on an OFDM access system, when forgetting averaging channel estimation is performed, there occurs a phase difference between a present channel estimated value and a past estimated value due to a change of FFT operation timing at a reception side. The error of the channel estimated value caused by the phase difference is corrected. A synchronization catching/tracking unit to determine an operation timing of an FFT from a received signal is provided, and an FFT operation timing difference acquisition section to grasp a change of the operation timing of the FFT generated by the synchronization catching/tracking unit is provided. Based on an FFT operation timing change amount as an output of the FFT operation timing difference acquisition section, a rotation operation is performed on a propagation path estimated result stored in a channel estimation section to estimate a propagation path from a received pilot signal, so that the error of the channel estimated value is corrected. | 02-25-2010 |
| 20100086084 | ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING DEMODULATOR - An OFDM demodulator which does not require a reference signal for synchronization of carriers and can reduce influence of phase rotation by a propagation path when carrier synchronization is made. The OFDM demodulator performs Fourier transform plural times in 2 or more different operation ranges for the same OFDM symbol, calculates phases of sub carriers from the plural-time results of the Fourier transform, compares the calculated phases for each of the plural-time results of the Fourier transform and detects an error in frequency of reproduction carrier from the compared results. | 04-08-2010 |
Dan Xu, Newcastle Upon Tyne GB
| Patent application number | Description | Published |
|---|---|---|
| 20100075884 | CLEANING COMPOSITION - An alkaline cleaning composition for use in a wash liquor comprising nanoparticles or a nanoparticles precursor and a nanoparticle compatible protease. | 03-25-2010 |
| 20100075885 | CLEANING COMPOSITION - An alkaline cleaning composition for use in aqueous medium comprising nanoparticles or a nanoparticles precursor and a polymeric nanoparticle stabilizer. | 03-25-2010 |
Dan Xu, Newcastle GB
| Patent application number | Description | Published |
|---|---|---|
| 20100075886 | CLEANING COMPOSITION - An alkaline cleaning composition for use in aqueous medium comprising nanoparticles or a nanoparticles precursor and a polymeric nanoparticle-protease compatibilizer. | 03-25-2010 |
Dan Xu, Newcastle/tyne GB
| Patent application number | Description | Published |
|---|---|---|
| 20090082242 | DISHWASHING METHOD - A method of cleaning a soiled load in an automatic dishwasher comprising the step of contacting the load with a phosphate free wash liquor comprising exfoliated nanoclay, the liquor having a pH of from about 9 to about 12 and an ionic strength of from about 0.001 to about 0.02 moles/l. | 03-26-2009 |
| 20090082243 | DETERGENT PARTICLE - A particle having a size of from about 50 to about 1,000 μm comprising a low-shear exfoliable nanoclay, the nanoclay having a primary particle size of from about 10 to about 300 nm. The invention also includes detergents comprising the particle and a process for making the particle. | 03-26-2009 |
Dan Xu, Springfield, IL US
| Patent application number | Description | Published |
|---|---|---|
| 20080238425 | SYSTEM AND METHOD FOR DESIGNING IMPROVED RF PULSE PROFILES - A system and method are provided for designing RF pulses which have improved magnetization profiles. By utilizing an optimal control approach as an alternative to, or in combination with, non-iterative approximations, RF pulses generated by the system and method described herein will exhibit less deviation from that of “ideal” Bloch solutions. Consequently, the magnetization profiles produced by the RF pulses generated by the system and method described herein will be closer to the desired profiles. In addition, limitations of non-iterative approximations, such as maximum tip angle limits and linearity constraints, can be avoided. | 10-02-2008 |
| 20080284439 | SYSTEM AND METHOD FOR AMPLITUDE REDUCTION IN RF PULSE DESIGN - A system and method are provided for adjusting RF pulses and gradient waveforms to reduce B | 11-20-2008 |
Dan Xu, Vestal, NY US
| Patent application number | Description | Published |
|---|---|---|
| 20110124500 | CATALYTIC PLATINUM-COPPER ALLOY NANOPARTICLES - High-quality bimetallic Pt | 05-26-2011 |
Dan Xu, Waukesha, WI US
| Patent application number | Description | Published |
|---|---|---|
| 20110150183 | DUAL-ENERGY IMAGING AT REDUCED SAMPLE RATES - The present disclosure relates to the generation of dual-energy X-ray data using a data sampling rate comparable to the rate utilized for single-energy imaging. In accordance with the present technique a reduced kVp switching rate is employed compared to conventional dual-energy imaging. Full angular resolution is achieved in the generated images. | 06-23-2011 |
Dan Xu, Shenzhen City CN
| Patent application number | Description | Published |
|---|---|---|
| 20110285551 | KEYBOARD - A keyboard includes a number of first keys, a control circuit, a switch circuit, and a second key. The switch circuit includes a number of switches. The second key is connected to first terminals of two switches of the switch circuit via the control circuit. A second terminal of each of the switches is connected to a first key. When a second key is pressed, the control circuit controls the switches corresponding to the pressed second key to be turned on, to activate the first keys which are connected to the switches. | 11-24-2011 |