US5905261A
Expired / Lapsed
US
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Imaging system and method using direct reconstruction of scattered radiation
Assignee: Revvity Health Sciences Inc
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Filing: 1997-09-25
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Granted: 1999-05-18
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Expires: 2017-09-25
Abstract
Abstract A method for the direct, mathematical reconstruction of the image of an object from measurements of the transmitted intensity of the scattered radiation effected by irradiating the object. The transmitted coefficient is related to the image by an integral operator. The image is directly, mathematical reconstructed by executing a prescribed mathematical algorithm, as determined with reference to the integral operator, on the transmitted coefficient, the algorithm further relating the absorption coefficient, the diffusion coefficient, or both to the transmitted coefficient by a different integral operator.
Inventors
- 👤 John Carl Schotland
- 👤 Masaru Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:34
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/4795; A; A61; A61B; A61B5/00; A61B5/0059; A61B5/145; A61B5/1455; A61B5/14551
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
83 words
A method for generating an absorption image of an object comprising the steps of irradiating the object with a source of radiation, measuring a transmission coefficient due predominantly to diffusively scattered radiation wherein said transmission coefficient is related to the absorption coefficient by an integral operator, and directly reconstructing the image by executing a prescribed mathematical algorithm, determined with reference to said integral operator, on said transmission coefficient, said algorithm further relating the absorption coefficient to said transmission coefficient by another integral operator.
Claim 2
Independent Claim
83 words
A method for generating an absorption image of an object comprising the steps of irradiating the object with a source of radiation, measuring a transmission coefficient due predominantly to diffusively scattered radiation wherein said transmission coefficient is related to the absorption coefficient by an integral operator, and directly reconstructing the image by executing a prescribed mathematical algorithm, determined with reference to said integral operator, on said transmission coefficient, said algorithm further relating the absorption coefficient to said transmission coefficient by another integral operator.
Claim 3
Dependent Claim
21 words
The method as recited in claim 1 wherein the step of directly reconstructing includes the step of iteratively reconstructing the image.
Claim 4
Dependent Claim
100 words
Circuitry for generating an absorption image of an object comprising irradiation means for irradiating the object with a source of radiation, measurement means, responsive to the means for irradiating, for measuring a transmission coefficient due predominantly to diffusively scattered radiation wherein said transmission coefficient is related to the absorption coefficient by an integral operator, and reconstruction means, responsive to the means for measuring, for directly reconstructing the image by executing a prescribed mathematical algorithm, determined with reference to said integral operator, on said transmission coefficient, said algorithm further relating the absorption coefficient to said transmission coefficient by another integral operator.
Claim 5
Dependent Claim
100 words
Circuitry for generating an absorption image of an object comprising irradiation means for irradiating the object with a source of radiation, measurement means, responsive to the means for irradiating, for measuring a transmission coefficient due predominantly to diffusively scattered radiation wherein said transmission coefficient is related to the absorption coefficient by an integral operator, and reconstruction means, responsive to the means for measuring, for directly reconstructing the image by executing a prescribed mathematical algorithm, determined with reference to said integral operator, on said transmission coefficient, said algorithm further relating the absorption coefficient to said transmission coefficient by another integral operator.
Claim 6
Dependent Claim
18 words
The circuitry as recited in claim 3 wherein the reconstruction means includes means for iteratively reconstructing the image.
Claim 7
Independent Claim
83 words
A method for generating an diffusion image of an object comprising the steps of irradiating the object with a source of radiation, measuring a transmission coefficient due predominantly to diffusively scattered radiation wherein said transmission coefficient is related to the diffusion coefficient by an integral operator, and directly reconstructing the image by executing a prescribed mathematical algorithm, determined with reference to said integral operator, on said transmission coefficient, said algorithm further relating the diffusion coefficient to said transmission coefficient by another integral operator.
Claim 8
Independent Claim
83 words
A method for generating an diffusion image of an object comprising the steps of irradiating the object with a source of radiation, measuring a transmission coefficient due predominantly to diffusively scattered radiation wherein said transmission coefficient is related to the diffusion coefficient by an integral operator, and directly reconstructing the image by executing a prescribed mathematical algorithm, determined with reference to said integral operator, on said transmission coefficient, said algorithm further relating the diffusion coefficient to said transmission coefficient by another integral operator.
Claim 9
Dependent Claim
21 words
The method as recited in claim 5 wherein the step of directly reconstructing includes the step of iteratively reconstructing the image.
Claim 10
Dependent Claim
100 words
Circuitry for generating an diffusion image of an object comprising irradiation means for irradiating the object with a source of radiation, measurement means, responsive to the means for irradiating, for measuring a transmission coefficient due predominantly to diffusively scattered radiation wherein said transmission coefficient is related to the diffusion coefficient by an integral operator, and reconstruction means, responsive to the means for measuring, for directly reconstructing the image by executing a prescribed mathematical algorithm, determined with reference to said integral operator, on said transmission coefficient, said algorithm further relating the diffusion coefficient to said transmission coefficient by another integral operator.
Claim 11
Dependent Claim
100 words
Circuitry for generating an diffusion image of an object comprising irradiation means for irradiating the object with a source of radiation, measurement means, responsive to the means for irradiating, for measuring a transmission coefficient due predominantly to diffusively scattered radiation wherein said transmission coefficient is related to the diffusion coefficient by an integral operator, and reconstruction means, responsive to the means for measuring, for directly reconstructing the image by executing a prescribed mathematical algorithm, determined with reference to said integral operator, on said transmission coefficient, said algorithm further relating the diffusion coefficient to said transmission coefficient by another integral operator.
Claim 12
Dependent Claim
18 words
The circuitry as recited in claim 7 wherein the reconstruction means includes means for iteratively reconstructing the image.
Claim 13
Independent Claim
91 words
A method for generating absorption and diffusion images of an object comprising the steps of irradiating the object with a source of radiation, measuring a transmission coefficient due predominantly to diffusively scattered radiation wherein said transmission coefficient is related to the absorption coefficient and diffusion coefficient by an integral operator, and directly reconstructing the images by executing a prescribed mathematical algorithm, determined with reference to said integral operator, on said transmission coefficient, said algorithm further relating the absorption coefficient and the diffusion coefficient to said transmission coefficient by another integral operator.
Claim 14
Independent Claim
91 words
A method for generating absorption and diffusion images of an object comprising the steps of irradiating the object with a source of radiation, measuring a transmission coefficient due predominantly to diffusively scattered radiation wherein said transmission coefficient is related to the absorption coefficient and diffusion coefficient by an integral operator, and directly reconstructing the images by executing a prescribed mathematical algorithm, determined with reference to said integral operator, on said transmission coefficient, said algorithm further relating the absorption coefficient and the diffusion coefficient to said transmission coefficient by another integral operator.
Claim 15
Dependent Claim
21 words
The method as recited in claim 9 wherein the step of directly reconstructing includes the step of iteratively reconstructing the image.
Claim 16
Dependent Claim
106 words
Circuitry for generating absorption and diffusion images comprising irradiation means for irradiating the object with a source of radiation, measurement means, responsive to the means for irradiating, for measuring a transmission coefficient due predominantly to diffusively scattered radiation wherein said transmission coefficient is related to the absorption coefficient and the diffusion coefficient by an integral operator, and reconstruction means, responsive to the means for measuring, for directly reconstructing the images by executing a prescribed mathematical algorithm, determined with reference to said integral operator, on said transmission coefficient, said algorithm further relating the absorption coefficient and the diffusion coefficients to said transmission coefficient by another integral operator.
Claim 17
Dependent Claim
106 words
Circuitry for generating absorption and diffusion images comprising irradiation means for irradiating the object with a source of radiation, measurement means, responsive to the means for irradiating, for measuring a transmission coefficient due predominantly to diffusively scattered radiation wherein said transmission coefficient is related to the absorption coefficient and the diffusion coefficient by an integral operator, and reconstruction means, responsive to the means for measuring, for directly reconstructing the images by executing a prescribed mathematical algorithm, determined with reference to said integral operator, on said transmission coefficient, said algorithm further relating the absorption coefficient and the diffusion coefficients to said transmission coefficient by another integral operator.
Claim 18
Dependent Claim
18 words
The circuitry as recited in claim 11 wherein the reconstruction means includes means for iteratively reconstructing the image.
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