Device for correcting set-point signals and system for the generation of gradients comprising such a device
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Publication Number
US-8736268-B2
Publication Date
2014-05-27
Expiration Date
Abstract
A device for real-time correction of set-point signals intended to receive at the input set-point signals and to deliver at its output set-point signals that are modified to compensate for defects, negative effects or the like subsequently encountered during the processing and/or the application of the set-point signals. This device (1) includes at least one circuit (1′) that is based on a microprogrammed structure and composed of several subassemblies (3, 4, 5, 6, 6′) that work with digital components essentially including a micro-sequencer (3) forming a counter, a memory (4) for storing micro-instructions, and a processing unit (5) combined with at least one working memory (6, 6′) and integrating arithmetic calculation modules (7,7′), whereby the processing unit (5) modifies the data of set-point signals in accordance with the micro-instructions that are addressed by the micro-sequencer (3) and by taking into account the correction coefficients that are provided.
Core Innovation
The invention relates to a micro-programmed structure that is compatible with nuclear magnetic resonance (NMR) and configured for real-time correction of variable set-point signals of gradient coils. The device receives original digital set-point signals at an input and delivers modified set-point signals to gradient coils connected to either an NMR spectrometry device or an NMR imagery device. The modified set-point signals compensate for effects, limitations, disruptions, interference, and negative effects encountered during processing, transmission, transformation, and/or application of the set-point signals.
Correction in the device is performed in a correction cycle using factors or coefficients of correction or coefficients of compensation that are provided to the processing unit. The device includes at least one circuit composed of plural subassemblies that are operationally different from one another and work with digital components. These subassemblies include a micro-sequencer forming a counter, a memory configured for storing micro-instructions, a processing unit combined with at least one working memory, and two integrating arithmetic calculation modules.
The micro-sequencer addresses micro-instructions stored in the storage memory to form an arithmetic correction algorithm that controls the operation of the operationally different plural subassemblies. The working memory stores correction coefficients and stores output datum/output data of at least one corrected set-point signal. The two integrating arithmetic calculation modules provide real-time correction of the original digital set-point signals based on a convolution operation using the correction coefficients and stored output data from at least one prior correction cycle.
Claims Coverage
The document provides one independent claim (clm-00001) covering a micro-programmed NMR-compatible device that performs real-time correction of gradient-coil set-point signals. The core inventive features are implemented via a micro-sequencer/micro-instruction memory-driven processing unit and two integrating arithmetic calculation modules performing a convolution-based real-time correction using stored prior-cycle output data and correction coefficients.
Micro-programmed correction circuit for gradient coil set-point signals
A compatible nuclear magnetic resonance (NMR) device for real-time correction of variable set-point signals of gradient coils of an NMR spectrometry device or NMR imagery device, receiving original digital set-point signals and delivering modified set-point signals to compensate for effects, limitations, disruptions, interference, and negative effects encountered during processing, transmission, transformation, and/or application.
Micro-sequencer and micro-instruction memory controlling an arithmetic correction algorithm
At least one circuit connected between the input and the output, the circuit being a micro-programmed structure composed of plural subassemblies operationally different from one another and working with digital components, including a micro-sequencer forming a counter and a memory configured for storing micro-instructions that are addressed by the micro-sequencer to form an arithmetic correction algorithm controlling operation of the plural subassemblies.
Two integrating arithmetic calculation modules performing convolution-based real-time correction using prior-cycle outputs
The device modifies data of the received original digital set-point signals in a correction cycle by taking into account factors or coefficients of correction or coefficients of compensation provided in accordance with micro-instructions addressed by the micro-sequencer, and wherein the two integrating arithmetic calculation modules provide the correction in real-time based on a convolution operation using correction coefficients and stored output datum/output data of the working memory from at least one prior correction cycle.
Working memory storing correction coefficients and prior corrected output data
At least one working memory stores correction coefficients used by the arithmetic correction algorithm and stores output datum/output data of at least one corrected set-point signal, so that convolution-based real-time correction can be performed using coefficients and stored output data from prior correction cycles.
Overall claim coverage centers on an NMR-compatible, micro-programmed device architecture that performs real-time gradient-coil set-point correction in correction cycles. The correction algorithm is controlled by micro-instructions addressed by a micro-sequencer, and is executed using two integrating arithmetic calculation modules performing convolution using stored correction coefficients and prior-cycle corrected output data.
Stated Advantages
Documented Applications
Real-time correction of variable set-point signals of gradient coils for a nuclear magnetic resonance spectrometry device.
Real-time correction of variable set-point signals of gradient coils for a nuclear magnetic resonance imagery device.
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