Patent US5327474A successfully refreshed from Google Patents.
US5327474A
Expired / Lapsed
US
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X-ray radiographic apparatus for medical use
Assignee: Shimadzu Corp
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Filing: 1993-02-24
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Granted: 1994-07-05
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Expires: 2013-02-24
Abstract
Abstract An X-ray radiographic apparatus for medical use in photographing tomographic images and X-ray penetration images of an examinee. This apparatus has a bed horizontally movably supporting a top board for carrying the examinee, a gantry for X-ray tomography including a first X-ray source revolvable around the examinee and a first X-ray detector for detecting transmitted X-rays, a second X-ray source mounted on a moving mechanism movable on a three-dimensional coordinate system in an examination room accommodating the bed and the gantry, a high voltage unit for supplying an X-ray generating high current to the first X-ray source and the second X-ray source, a switch for selecting a destination of output of the high voltage unit, and a second X-ray detector for detecting transmitted X-rays from the second X-ray source.
Inventors
- 👤 Yoshihiro Inoue
- 👤 Katsunori Sukeyasu
- 👤 Yoshitaka Okumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:49
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/44; A61B6/4429; A61B6/4464; A61B6/02; A61B6/03; A61B6/032; A61B6/40; A61B6/4007; A61B6/42; H; H05; H05G; H05G1/00; H05G1/08; H05G1/26; H05G1/70
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
132 words
An X-ray radiographic apparatus for medical use in photographing tomographic images and X-ray penetration images of an examinee, said apparatus comprising: a bed horizontally movably supporting a top board for carrying the examinee; a gantry for X-ray tomography including a first X-ray source revolvable around the examinee, and first X-ray detecting means for detecting transmitted X-rays; a second X-ray source mounted on a moving mechanism movable on a three-dimensional coordinate system in an examination room accommodating said bed and said gantry; a high voltage unit for supplying an X-ray generating high current to said first X-ray source and said second X-ray source; switch means for selecting a destination of output of said high voltage unit; and at least one second X-ray detecting means for detecting transmitted X-rays from said second X-ray source.
Claim 2
Dependent Claim
132 words
An X-ray radiographic apparatus for medical use in photographing tomographic images and X-ray penetration images of an examinee, said apparatus comprising: a bed horizontally movably supporting a top board for carrying the examinee; a gantry for X-ray tomography including a first X-ray source revolvable around the examinee, and first X-ray detecting means for detecting transmitted X-rays; a second X-ray source mounted on a moving mechanism movable on a three-dimensional coordinate system in an examination room accommodating said bed and said gantry; a high voltage unit for supplying an X-ray generating high current to said first X-ray source and said second X-ray source; switch means for selecting a destination of output of said high voltage unit; and at least one second X-ray detecting means for detecting transmitted X-rays from said second X-ray source.
Claim 3
Dependent Claim
21 words
An X-ray radiographic apparatus as defined in claim 1, wherein said second X-ray detecting means comprises a cassette containing X-ray film.
Claim 4
Dependent Claim
41 words
An X-ray radiographic apparatus as defined in claim 2, wherein said cassette is mountable in a case movable along a pair of guide rails extending vertically on a wall of said gantry, and fixable to a selected position on said wall.
Claim 5
Dependent Claim
28 words
An X-ray radiographic apparatus as defined in claim 3, wherein said case has an X-ray shielding sheet applied to a side surface thereof facing inwardly of said gantry.
Claim 6
Dependent Claim
17 words
An X-ray radiographic apparatus as defined in claim 2, wherein said cassette is mountable in said bed.
Claim 7
Dependent Claim
27 words
An X-ray radiographic apparatus as defined in claim 2, wherein said cassette is mountable on a Bucky's stand installed in a selected position in said examination room.
Claim 8
Dependent Claim
92 words
An X-ray radiographic apparatus as defined in claim 2, wherein said moving mechanism of said second X-ray source includes: a ceiling frame secured to a ceiling of said examination room; a movable frame movable within said ceiling frame; a support block movable within said movable frame in a direction perpendicular to a direction of movement of said movable frame; and a vertically extendible and contractible ceiling suspender having an upper end thereof secured to said support block, said second X-ray source being pivotably attached to a lower end of said ceiling suspender.
Claim 9
Dependent Claim
27 words
An X-ray radiographic apparatus as defined in claim 1, wherein said second X-ray detecting means comprises an image intensifier for converting transmitted X-rays to an optical image.
Claim 10
Dependent Claim
96 words
An X-ray radiographic apparatus as defined in claim 8, wherein said moving mechanism of said second X-ray source includes: a ceiling frame secured to a ceiling of said examination room; a movable frame movable within said ceiling frame; a support block movable within said movable frame in a direction perpendicular to a direction of movement of said movable frame; and a C-shaped arm pivotably attached to said support block; said second X-ray source being attached to one and of said C-shaped arm, and said image intensifier being attached to the other end of said C-shaped arm.
Claim 11
Dependent Claim
27 words
An X-ray radiographic apparatus as defined in claim 1, wherein said second X-ray detecting means comprises a digital sensor having semiconductor elements arranged multidimensionally to detect X-rays.
References Cited (Backward Citations)
JPS5416197A
Cited
US4501011A
Cited
US4672454A
Cited
WO1989004996A1
Cited
EP0373596A1
Cited
US5199060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-04 | 1998-01-03 | 1998-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-04 | 2002-01-03 | 2002-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-04 | 2006-01-03 | 2006-07-05 | $7700.00 | Window Closed / Lapsed |