US 4,234,794 AGranted

Installation of radiodiagnosis with sweep

AssigneeStatia de Verificare si Intretinere a Aparaturii Medicale

InventorsVasile Voinea, Vasile Catuneanu, Ioan Birzu, Eugen Teisanu, Maria I. Voinea, Sorin Patrascu

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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.

Claims7

Dependent claims

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.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 05/962,153Filed 20 Nov 1978
Priority: RO 9258722 Dec 1977
Granted: 18 Nov 1980
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H05G 1/64
Electrical details: circuit arrangements for X-ray apparatus incorporating image intensifiers
A61B 6/02
Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment: arrangements…
A61B 6/4028
Involving movement of the focal spot: resulting in acquisition of views from substantially different positions, e.g. EBCT
G21K 1/025
Using diaphragms, collimators: using multiple collimators, e.g. Bucky screens; other devices for eliminating undesired or dispersed radiation