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Alagappan
Rajakumar Alagappan, Bangalore IN
| Patent application number | Description | Published |
|---|---|---|
| 20110100015 | GAS TURBINE SYSTEM TO INHIBIT COKE FORMATION AND METHODS OF USE - A gas turbine comprising a liquid fuel supply system configured to provide a liquid fuel to a combustion system of the gas turbine; and an additive injection system in fluid communication with the liquid fuel supply system, wherein the additive injection system is configured to mix an additive blend with the liquid fuel to form a liquid fuel-additive mixture configured to inhibit coke formation in the liquid fuel supply system. | 05-05-2011 |
Vijay Alagappan, Somerville, MA US
| Patent application number | Description | Published |
|---|---|---|
| 20100052679 | Coil Array Mode Compression For Parallel Transmission Magnetic Resonance Imaging - A method for target-dependent, sparsity-enforced selection for choosing a substantially optimal connection of radiofrequency (“RF”) transmitters to the elements of the RF coil array is provided. In particular, a method is provided that selects the linear combinations of the “N” spatial mode profiles of a transmission RF coil array, such that the k-space trajectory and pulse duration acceleration capabilities of the array are advantageously utilized. A sparsity-enforcement method that determines a subset of the available spatial modes for a parallel transmission RF coil array is employed to this end. In this manner, the utilization of the encoding power of a highly-parallel N-mode coil array in a system with only “P” available excitation channels is enabled. | 03-04-2010 |
Vijayanand Alagappan, Streetsboro, OH US
| Patent application number | Description | Published |
|---|---|---|
| 20100156411 | METHOD FOR PRODUCING SPECTRAL-SPATIAL PARALLEL RF EXCITATION PULSES FOR MAGNETIC RESONANCE IMAGING - A method for producing a spatially and spectrally selective radiofrequency (“RF”) excitation pulse includes establishing a desired spatial RF excitation pattern and establishing a desired spectral RF excitation pattern. The method also includes estimating an RF transmission profile map indicative of the transmission characteristics of an RF coil and determining, from the desired spatial and spectral excitation patterns and the estimated RF transmission profile map, at least one magnetic field gradient waveform indicative of locations in k-space to which RF energy is to be deposited. The method further includes determining, from the established spatial and spectral excitation patterns, the estimated RF transmission profile map, and the determined at least one gradient waveform, at least one RF excitation pulse waveform that will produce the desired spatial and spectral excitation patterns. | 06-24-2010 |
| 20100289494 | System and Method for Mode Mixing in Magnetic Resonance Imaging - The present invention provides a system and method for using a hardware-based compression of signals acquired with an magnetic resonance imaging (MRI) system. This allows a first multi-channel MR signal to be compressed to a second multi-channel MR signal having fewer channels than the first MR signal. This system and method reduces the number of RF receivers needed to achieve the sensitivity encoding benefits associated with highly parallel detection in MRI. Furthermore, the system and method reduces bottlenecks connection an MRI system's RF receiver and reconstruction computer and reduces the computational burden of image reconstruction. | 11-18-2010 |
Vijayanand Alagappan, Aurora, OH US
| Patent application number | Description | Published |
|---|---|---|
| 20100066361 | METHOD FOR FAST MAGNETIC RESONANCE RADIOFREQUENCY COIL TRANSMISSION PROFILE MAPPING - A system and method for producing an image indicative of characteristics of a radiofrequency (“RF”) coil with a magnetic resonance imaging (“MRI”) system is disclosed. The method includes acquiring MR signals while performing a pulse sequence with the MRI system and driving the RF coil at a selected transmission power. This process is repeated a plurality of times to drive the RF coil at a different transmission powers during each repetition. A plurality of images are reconstructed from the acquired MR signals and an image indicative of RF reception characteristics of the RF coil is produced from the reconstructed images. Subsequently, an image indicative of RF transmission characteristics of the RF coil is produced using the image indicative of the RF receiver response. More specifically, only one data acquisition is necessary for each RF coil element to produce the image indicative of the RF transmission characteristics for that coil element. | 03-18-2010 |