Patent US4740699A successfully refreshed from Google Patents.
US4740699A
Expired / Lapsed
US
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Radiographic image reading method
Assignee: Konica Minolta Inc
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Filing: 1986-09-30
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Granted: 1988-04-26
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Expires: 2006-09-30
Abstract
Abstract A method of reading out a radiographic image by storing radiation energy corresponding to a radiographic image on a stimulative phosphor layer on a panel, scanning the layer with a semi-conductor laser to release the energy as fluorescence, and detecting the fluorescence to form an image, wherein wavelengths having an intensity lower than an excitation wavelength intensity of said laser are removed by optical means before scanning the layer.
Inventors
- 👤 Mikio Miura
- 👤 Hisanori Tsuchino
- 👤 Makoto Kumagai
- 👤 Fumio Shimada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:28
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/16; G03C5/17; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/2012; G01T1/2014; G03C5/164
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A method of reading out a radiographic image which comprises a. storing radiation energy corresponding to a radiographic image on a stimulable phosphor layer on a panel, b. scanning said layer with a semi-conductor laser to release said energy as fluorescence, and c. detecting said fluorescence to form an image, wherein all wavelengths having an intensity lower than an emission peak intensity of said laser are removed by optical means before scanning said layer.
Claim 2
Independent Claim
74 words
A method of reading out a radiographic image which comprises a. storing radiation energy corresponding to a radiographic image on a stimulable phosphor layer on a panel, b. scanning said layer with a semi-conductor laser to release said energy as fluorescence, and c. detecting said fluorescence to form an image, wherein all wavelengths having an intensity lower than an emission peak intensity of said laser are removed by optical means before scanning said layer.
Claim 3
Dependent Claim
23 words
The method according to claim 1, wherein said optical means is selected from the group consisting of prisms, diffraction gratings, interferometers and filters.
Claim 4
Dependent Claim
13 words
The method according to claim 2, wherein said optical means is a filter.
Claim 5
Dependent Claim
22 words
The method according to claim 1, wherein said semi-conductor layer's wavelength is in the range of from 500 nm to 1000 nm.
Claim 6
Dependent Claim
34 words
The method according to claim 1, wherein said method includes using a filter for dividing said fluorescence from said semi-conductor laser and letting only said fluorescence pass before detecting said fluorescence by a detector.
Claim 7
Dependent Claim
20 words
The method according to claim 1 wherein said wavelength of semiconductor laser is in the range of from 650-1000 nm.
Claim 8
Dependent Claim
15 words
The method according to claim 1 wherein said semiconductor laser has a single emission peak.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |