HIGH EFFICIENCY COMPUTER TOMOGRAPHY WITH OPTIMIZED RECURSIONS
First Claim
1. A system comprising:
- one or more transmitters to transmit an excitation energy into an object under observation;
one or more detectors to generate projection space data encoding an energy received by the one or more detectors in response to the transmitted excitation energy into the object under observation;
a controller to control the one or more transmitters to transmit the excitation energy and the one or more receivers to generate the projection space data; and
an image reconstructor having at least one processor to receive the projection space data and to process the projection space data by;
computing a first quantity characterizing a difference between the projection space data and predicted projection data, wherein the difference between the projection space data and predicted projection data is associated with a projection gain;
recording, in a data storage device, a first data encoding said difference;
computing a revised first quantity based on recorded first data from preceding iterations;
computing an update value using the revised first quantity; and
reconstructing an object space image representing the object under observation using the update value.
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Accused Products
Abstract
A system comprising: one or more transmitters to transmit an excitation energy into an object under observation; one or more detectors to generate projection space data encoding an energy received by the one or more detectors in response to the transmitted excitation energy into the object under observation; a controller to control the one or more transmitters to transmit the excitation energy and the one or more receivers to generate the projection space data; and an image reconstructor having at least one processor to receive the projection space data and to process the projection space data by: computing a first quantity characterizing a difference between the projection space data and predicted projection data, wherein the difference between the projection space data and predicted projection data is associated with a projection gain; recording, in a data storage device, a first data encoding the difference; computing a revised first quantity based on recorded first data from preceding iterations; computing an update value using the revised first quantity; and reconstructing an object space image representing the object under observation using the update value.
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Citations
20 Claims
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1. A system comprising:
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one or more transmitters to transmit an excitation energy into an object under observation; one or more detectors to generate projection space data encoding an energy received by the one or more detectors in response to the transmitted excitation energy into the object under observation; a controller to control the one or more transmitters to transmit the excitation energy and the one or more receivers to generate the projection space data; and an image reconstructor having at least one processor to receive the projection space data and to process the projection space data by; computing a first quantity characterizing a difference between the projection space data and predicted projection data, wherein the difference between the projection space data and predicted projection data is associated with a projection gain; recording, in a data storage device, a first data encoding said difference; computing a revised first quantity based on recorded first data from preceding iterations; computing an update value using the revised first quantity; and reconstructing an object space image representing the object under observation using the update value. - View Dependent Claims (2, 3, 4, 5)
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6. A workstation comprising:
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one or more processors; and one or more data storage devices storing software to be executed by the one or more processors, the software comprising; software code to receive input data representing an object projected from an object space to a projection space; software code to compute a first quantity characterizing a difference between the input data and predicted projection data, wherein the difference between the input data and predicted projection data is associated with a projection gain; software code to compute an update value using the first quantity; software code to record, in the one or more data storage devices, or the another one or more data storage devices, a second data encoding said update value; software code to revise said update value based on recorded second data from the preceding iterations; and software code to reconstruct an object space image representing the object under observation using the revised update value, wherein the revised update value is associated with a voxel gain. - View Dependent Claims (7, 8, 9, 10)
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11. A method implemented by one or more processors executing software code stored on one or more data storage devices, the method comprising:
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receiving input data representing an object projected from an object space to a projection space from at least one of a projection image acquisition system, the one or more data storage devices, another one or more data storage devices, a software simulation executed by the one or more processors, or a software simulation executed by another one or more processors; computing a first quantity characterizing a difference between the input data on a resolution grid and predicted projection data on the resolution grid, wherein the difference between the input data and predicted projection data is associated with a projection gain; recording, in the one or more data storage devices, or the another one or more data storage devices, a first data encoding said difference; computing a revised first quantity based on recorded first data from preceding iterations; computing an update value using the revised first quantity, wherein the update value is associated with a voxel gain; recording, in the one or more data storage devices, or the another one or more data storage devices, a second data encoding said update value; revising the update value based on recorded second data from the preceding iterations; reconstructing an image representing the object under observation using the revised update value, and outputting the reconstructed image to an output device, wherein the output device is at least one of the one or more data storage devices, another one or more data storage devices, a display device, or a printing device; wherein receiving the input data, computing the first quantity, recording the first data, computing the revised first quantity, computing the second quantity, reconstructing the image, and outputting the reconstructed image are performed by the one or more processors according to the software code stored on the one or more data storage devices. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification