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US 2004/0105528 A1Published application
Method and system for tomosynthesis image enhancement using transverse filtering
AssigneeGeneral Electric Company
InventorsBernhard Erich Hermann Claus, Jeffrey Wayne Eberhard
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Abstract
A technique is provided for reducing contrast variability in images produced by tomosynthesis. In particular, contrast variability in images produced by a radiation source which has a linear or elongated scan path is reduced. The technique filters the radiographic projections or the reconstructed image slices in a direction transverse to the scan-direction of the radiation source to reduce contrast variations related to the orientation of the structure and the scan geometry.
Claims60
A method for processing radiographic image data, comprising:
- moving a radiation source relative to an imaged object to obtain two or more radiographic projections of the imaged object at two or more corresponding view angles;
- filtering the radiographic projections in a direction generally transverse to a scan path of the radiation source;
- and
- applying a reconstruction algorithm to the filtered projections to reconstruct one or more reconstructed slices.
1 more element
A method for processing radiographic image data, comprising:
- moving a radiation source relative to an imaged object to obtain two or more radiographic projections of the imaged object at two or more corresponding view angles;
- applying a reconstruction algorithm to the radiographic projections to reconstruct one or more image slices;
- and
- filtering the image slices in a direction transverse to a scan path of the radiation source.
1 more element
A system for processing radiographic image data, comprising:
- a radiation source capable of producing a stream of radiation;
- a control circuit operably coupled to the radiation source;
- a detector capable of detecting the stream of radiation and generating two or more radiographic projections;
- a motor controller configured to displace at least one of the radiation source, the detector, and a patient platform;
- a processing circuit operably coupled to the detector configured to receive the two or more radiographic projections and to reconstruct the two or more radiographic projections to form one or more reconstructed slices representative of one or more structures within an imaged volume, wherein the processing circuit applies at least one complementary filter to at least one of the two or more radiographic projections and the one or more reconstructed slices in a direction generally transverse to a scan path of the radiation source;
- and
- an operator workstation operably couple to the processing circuit configured to display the one or more reconstructed slices.
4 more elements
A system for processing radiographic image data, comprising:
- a radiation source capable of producing a stream of radiation;
- a control circuit operably coupled to the radiation source;
- a detector capable of detecting the stream of radiation and generating two or more radiographic projections;
- a motor controller configured to displace at least one of the radiation source, the detector, and a patient platform;
- a processing circuit operably coupled to the detector configured to receive the two or more radiographic projections and to reconstruct the two or more radiographic projections to form one or more reconstructed slices representative of one or more structures within an imaged volume, wherein the processing circuit comprises a means for reducing contrast asymmetry in the one or more reconstructed slices;
- and
- an operator workstation operably couple to the processing circuit configured to display the one or more reconstructed slices.
4 more elements
A tangible medium for processing radiographic image data, comprising:
- a routine for filtering two or more radiographic projections in a direction generally transverse to a scan path of a radiation source used to generate the projections;
- and
- a routine for applying a reconstruction algorithm to the filtered projections to generate one or more reconstructed slices.
A tangible medium for processing radiographic image data, comprising:
- a routine for applying a reconstruction algorithm to two or more radiographic projections to generate one or more reconstructed slices;
- and
- a routine for filtering the one or more reconstructed slices in a direction generally transverse to a scan path of the radiation source used to generate the projections.
A method for processing radiographic image data, comprising:
- moving a radiation source relative to an imaged object to obtain two or more radiographic projections of the imaged object at two or more corresponding view angles;
- applying a reconstruction algorithm to the radiographic projections to reconstruct one or more reconstructed slices, wherein applying the reconstruction algorithm comprises applying a complementary filter to the radiographic projections in a direction generally transverse to a scan path of the radiation source.
A system for processing radiographic image data, comprising:
- a radiation source capable of producing a stream of radiation;
- a control circuit operably coupled to the radiation source;
- a detector capable of detecting the stream of radiation and generating two or more radiographic projections;
- a motor controller configured to displace at least one of the radiation source, the detector, and a patient platform;
- a processing circuit operably coupled to the detector configured to apply a reconstruction algorithm to the two or more radiographic projections to reconstruct one or more reconstructed slices representative of one or more structures within an imaged volume, wherein the reconstruction algorithm comprises a complementary filter which filters the radiographic projections in a direction generally transverse to a scan path of the radiation source;
- and
- an operator workstation operably couple to the processing circuit configured to display the one or more reconstructed slices.
4 more elements
A tangible medium for processing radiographic image data, comprising:
- a routine for applying a reconstruction algorithm to two or more radiographic projections to reconstruct one or more reconstructed slices, wherein the two or more radiographic projections are obtained at different view angles relative to an imaged object and wherein applying the reconstruction algorithm comprises applying a complementary filter to the radiographic projections in a direction generally transverse to a scan path of the radiation source.
Dependencies are inferred from the claim text.