Patent US4234794A successfully refreshed from Google Patents.
US4234794A
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Installation of radiodiagnosis with sweep
Assignee: STATIA DE VERIFICARE SI INTRETINERE A APARATURII MEDICALE
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Filing: 1978-11-20
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Granted: 1980-11-18
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Expires: 1998-11-20
Abstract
Abstract The installation according to the invention practically eliminates the total irradiation of the radiologic examinated persons, using an X radiations source, which produces a swept filiform beam, synchronized with the sweep of a T.V. monitor. In this way the useless irradiation of the entire examined surface is avoided with a strict exception of a single image point useful at one given moment, image point which is transmitted to the T.V. monitor. There are given more achievement variants of the swept filiform beam, as: radioopaques screens with punctiform orifices or slits and radiodiagnosis tubes with swept emission point of the X radiation associated with antidiffusion grids which turn the swept X radiations beam into a swept filiform X radiations beam. The radiodiagnosis tube with swept emission point of the X radiations is utilized also for the achievement of a tomoscopy or an electronic tomography with the wipe in surface. In this purpose the desirable plane of the examinated object is selected by adjustment of the sweep on the T.V. monitor by means of a supplementary deflexion system.
Inventors
- 👤 Vasile Voinea
- 👤 Vasile Catuneanu
- 👤 Ioan Birzu
- 👤 Eugen Teisanu
- 👤 Maria I. Voinea
- 👤 Sorin Patrascu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:11
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/08; H05G1/64; A; A61; A61B; A61B6/00; A61B6/02; A61B6/40; A61B6/4021; A61B6/4028; G; G21; G21K; G21K1/00; G21K1/02; G21K1/025; H01; H01J; H01J35/00; H01J35/02; H01J35/025; H01J35/24; H01J35/26
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
253 words
A radiodiagnosis-tomography apparatus comprising: a radiodiagnosis tube including: a sealed envelope having a cylindrical axially extending first portion, a cylindrical axially extending second portion, coaxial with said first portion and of a larger diameter than said first portion, and a third portion coaxial with said first and second portions and of a smaller diameter than said second portion, a rotary anode in said second portion, a rotatable body forming part of an electric motor in said third portion operatively connected to said anode for rotating same, a cathode in said second portion extending axially from said first portion and juxtaposed with said anode and cooperating therewith to produce an outwardly directed X-ray beam sweeping around said second portion, and an annular radio-opaque shield of a metal of high atomic weight and high melting point disposed in said second portion and surrounding said anode, said shield being formed with at least one opening and being provided with means for rotating said shield about a common axis of said envelope and said anode for sweeping a filiform pencil of X-ray radiation derived from said beam across a patient juxtaposed with said second portion of said envelope: a transducer responsive to X-ray radiation spaced from said second portion and intercepting the portion of said pencil of X-ray radiation traversing the patient, producing signals adapted to generate a television display; and means responsive to said signals and synchronized with the rotation of said shield for displaying a series of points representing a tomographic image of the patient.
Claim 2
Dependent Claim
253 words
A radiodiagnosis-tomography apparatus comprising: a radiodiagnosis tube including: a sealed envelope having a cylindrical axially extending first portion, a cylindrical axially extending second portion, coaxial with said first portion and of a larger diameter than said first portion, and a third portion coaxial with said first and second portions and of a smaller diameter than said second portion, a rotary anode in said second portion, a rotatable body forming part of an electric motor in said third portion operatively connected to said anode for rotating same, a cathode in said second portion extending axially from said first portion and juxtaposed with said anode and cooperating therewith to produce an outwardly directed X-ray beam sweeping around said second portion, and an annular radio-opaque shield of a metal of high atomic weight and high melting point disposed in said second portion and surrounding said anode, said shield being formed with at least one opening and being provided with means for rotating said shield about a common axis of said envelope and said anode for sweeping a filiform pencil of X-ray radiation derived from said beam across a patient juxtaposed with said second portion of said envelope: a transducer responsive to X-ray radiation spaced from said second portion and intercepting the portion of said pencil of X-ray radiation traversing the patient, producing signals adapted to generate a television display; and means responsive to said signals and synchronized with the rotation of said shield for displaying a series of points representing a tomographic image of the patient.
Claim 3
Dependent Claim
19 words
The apparatus defined in claim 1 wherein said shield is connected to said body for rotation with said anode.
Claim 4
Dependent Claim
32 words
The apparatus defined in claim 1 wherein the means for rotating said shield comprises another rotary body forming part of an electric motor and disposed in said first portion of said envelope.
Claim 5
Dependent Claim
13 words
The apparatus defined in claim 1 wherein said transducer includes a photomultiplier scintillator.
Claim 6
Dependent Claim
34 words
The apparatus defined in claim 1, further comprising an array of elongated elements composed of a material of high molecular weight and having axes directed at corresponding points of the sweep of the pencil.
Claim 7
Dependent Claim
22 words
The apparatus defined in claim 1, 2, 3, 4 or claim 5 wherein said opening is one of a plurality of slits.
Claim 8
Dependent Claim
26 words
The apparatus defined in claim 1, 2, 3, 4 or 5 wherein said opening is one of a plurality of holes disposed in a helical pattern.
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) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |