US4891844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation image detecting system
Assignee: Shimadzu Corp
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Filing: 1988-03-25
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Granted: 1990-01-02
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Expires: 2008-03-25
Abstract
Abstract A radiation image detecting system with the image divided into pixels. In this system the pixel signals are detected with a method of coded aperture. All the pixels are grouped into equal-sized areas, each of which includes the same number of pixels forming a square sub-matrix of pixels. The pixel signals corresponding to the pixels contained in the above sub-matrix are obtained in the form of coded signals by being detected a plurality number of times successively with a plurality of sensor groups which are made purposefully different from one another in the number, arrangement pattern and size of the sensors.
Inventors
- 👤 Motosada Kiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:30
CPC Classifications
H; H04; H04N; H04N25/00; H04N25/70; H04N25/76; H04N25/30; H04N25/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
203 words
A radiation image detecting system in which a radiation image projection plane divided into pixel domains for the purpose of detecting a radiation image with the same divided into pixels by placing at said radiation image projection plane a radiation image detecting plate on which a numerous number of radiation sensors are arrayed, said radiation image detecting system comprising: a radiation image detecting plate divided into rows and columns of the same-sized sensor domains, each of which consists of the same-sized sensor subdomains, all of which are to correspond to one predetermined partial area supposed on said radiation image projection plane, each of said same-sized sensor subdomains including at least some number of radiation sensors different in number, size and distribution depending on each of said same-sized sensor subdomains; a sensor displacing means for displacing said radiation image detecting plate stepwise so that each of said same-sized sensor subdomains may be successively brought to said one predetermined partial area supposed on said radiation image projection plane; a memory for storing the output signals from said radiation sensors each time said radiation image detecting plate is displaced; and a computing means for solving the simultaneous equations given the output signals from said radiation sensors.
Claim 2
Dependent Claim
203 words
A radiation image detecting system in which a radiation image projection plane divided into pixel domains for the purpose of detecting a radiation image with the same divided into pixels by placing at said radiation image projection plane a radiation image detecting plate on which a numerous number of radiation sensors are arrayed, said radiation image detecting system comprising: a radiation image detecting plate divided into rows and columns of the same-sized sensor domains, each of which consists of the same-sized sensor subdomains, all of which are to correspond to one predetermined partial area supposed on said radiation image projection plane, each of said same-sized sensor subdomains including at least some number of radiation sensors different in number, size and distribution depending on each of said same-sized sensor subdomains; a sensor displacing means for displacing said radiation image detecting plate stepwise so that each of said same-sized sensor subdomains may be successively brought to said one predetermined partial area supposed on said radiation image projection plane; a memory for storing the output signals from said radiation sensors each time said radiation image detecting plate is displaced; and a computing means for solving the simultaneous equations given the output signals from said radiation sensors.
References Cited (Backward Citations)
US3703724A
Cited
US3840747A
Cited
US4146295A
Cited
US4246483A
Cited
US4209780A
Cited
US4360797A
Cited
US4228420A
Cited
US4389633A
Cited
US4688242A
Cited
US4734588A
Cited
US4809309A
Cited
US4755681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-01 | 1993-07-03 | 1994-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-01 | 1997-07-03 | 1998-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-01 | 2001-07-03 | 2002-01-02 | $7700.00 | Window Closed / Lapsed |