US5787888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorption tomography system and method using direct reconstruction of scattered radiation
Assignee: Revvity Health Sciences Inc
•
Filing: 1995-05-15
•
Granted: 1998-08-04
•
Expires: 2015-05-15
Abstract
Abstract A method for the direct reconstruction of an object from measurements of the transmitted intensity of diffusively scattered radiation effected by irradiating the object with a source of continuous wave radiation. The transmitted intensity is related to the absorption coefficient by an integral operator. The image is directly reconstructed by executing a prescribed mathematical algorithm, as determined with reference to an integral operator, on the transmitted intensity of the diffusively scattered radiation.
Inventors
- 👤 John Carl Schotland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:09
CPC Classifications
G; G06; G06T; G06T12/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A method for generating an absorption image of an object comprising the steps of: irradiating the object with an amplitude-modulated continuous wave source of radiation, wherein said source of radiation is amplitude-modulated at a single modulation frequency, measuring a transmitted intensity due predominantly to diffusively scattered radiation wherein said transmitted intensity is related to an 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 transmitted intensity.
Claim 2
Independent Claim
83 words
A method for generating an absorption image of an object comprising the steps of: irradiating the object with an amplitude-modulated continuous wave source of radiation, wherein said source of radiation is amplitude-modulated at a single modulation frequency, measuring a transmitted intensity due predominantly to diffusively scattered radiation wherein said transmitted intensity is related to an 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 transmitted intensity.
Claim 3
Dependent Claim
25 words
The method as recited in claim 1 wherein the step of irradiating the object includes the step of successively irradiating the object with different wavelengths.
Claim 4
Dependent Claim
23 words
The method as recited in claim 1 wherein said step of directly reconstructing the image includes the step of computing an absorption kernel.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein said single modulation frequency is from 100 MHz to 500 MHz.
Claim 6
Dependent Claim
25 words
The method of claim 1 further comprising the step of successively irradiating the object with amplitude modulated continuous waves at a series of modulation frequencies.
Claim 7
Independent Claim
71 words
A system for generating an absorption image of an object comprising continuous wave radiation source means for irradiating the object, detector means for measuring a transmitted intensity due predominantly to diffusively scattered radiation wherein said transmitted intensity is related to an absorption coefficient by an integral operator, and means for directly reconstructing the image by executing a prescribed mathematical algorithm, determined with reference to said integral operator, on said transmitted intensity.
Claim 8
Independent Claim
71 words
A system for generating an absorption image of an object comprising continuous wave radiation source means for irradiating the object, detector means for measuring a transmitted intensity due predominantly to diffusively scattered radiation wherein said transmitted intensity is related to an absorption coefficient by an integral operator, and means for directly reconstructing the image by executing a prescribed mathematical algorithm, determined with reference to said integral operator, on said transmitted intensity.
Claim 9
Dependent Claim
25 words
The system as recited in claim 6 wherein said source means for irradiating the object includes means for successively irradiating the object with different wavelengths.
Claim 10
Dependent Claim
22 words
The system as recited in claim 6 wherein said means for directly reconstructing the image includes means for computing an absorption kernel.
References Cited (Backward Citations)
US4515165A
Cited
US4948974A
Cited
US5090415A
Cited
US5148022A
Cited
US5158090A
Cited
US5070455A
Cited
US5140463A
Cited
US5213105A
Cited
US5203339A
Cited
US5275168A
Cited
US5270853A
Cited
US5528365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-08-03 | 2002-02-02 | 2002-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-03 | 2006-02-02 | 2006-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-03 | 2010-02-02 | 2010-08-04 | $7700.00 | Window Closed / Lapsed |