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Title: Tomographic scanning apparatus with ionization detector means

Abstract

An axial tomography system is disclosed which includes an assembly rotatable about an axis extending along a central opening defined therein, and means for positioning the body portion to be examined within the central opening so that the axis of assembly rotation is perpendicular to a plane passing through the bodily structures to be examined. A source of penetrating radiation is mounted on the assembly toward one side thereof and provides radiation in the form of a fan beam. Means are provided for rotating the assembly so that the fan beam impinges upon said body portion at a plurality of incident directions. Detector means for the radiation are positioned on the assembly opposite the source, enabling detection of radiation which traverses laterally and is not absorbed in the thin body section in which the aforementioned plane resides. The detector means is preferably of the ionization type, and may comprise an array of side-by-side mutually insulated strip electrodes, spaced from a common high voltage electrode. The principal axis of each electrode is oriented along a radius extending toward the radiation source, and the ionization space between such strip and the common electrode can be regarded as defining a cell the principalmore » axis of which is similarly oriented. Collimating means overlie the detector means and serve to assure that the radiation incident on each such cell is only that which has passed through an appropriate element of the body portion being examined.« less

Inventors:
;
Publication Date:
OSTI Identifier:
5631067
Patent Number(s):
US 4275305
Application Number:
TRN: 82-004314
Assignee:
General Electric Co
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 24 Aug 1978
Country of Publication:
United States
Language:
English
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; CAT SCANNING; DESIGN; RADIATION DETECTORS; COLLIMATORS; DIAGNOSTIC TECHNIQUES; IONIZATION; ROTATION; X-RAY DETECTION; X-RAY EQUIPMENT; COMPUTERIZED TOMOGRAPHY; DETECTION; EQUIPMENT; IMAGE PROCESSING; MEASURING INSTRUMENTS; MOTION; PROCESSING; RADIATION DETECTION; TOMOGRAPHY; 550602* - Medicine- External Radiation in Diagnostics- (1980-)

Citation Formats

Racz, J A, and Seppi, E J. Tomographic scanning apparatus with ionization detector means. United States: N. p., 1981. Web.
Racz, J A, & Seppi, E J. Tomographic scanning apparatus with ionization detector means. United States.
Racz, J A, and Seppi, E J. Tue . "Tomographic scanning apparatus with ionization detector means". United States.
@article{osti_5631067,
title = {Tomographic scanning apparatus with ionization detector means},
author = {Racz, J A and Seppi, E J},
abstractNote = {An axial tomography system is disclosed which includes an assembly rotatable about an axis extending along a central opening defined therein, and means for positioning the body portion to be examined within the central opening so that the axis of assembly rotation is perpendicular to a plane passing through the bodily structures to be examined. A source of penetrating radiation is mounted on the assembly toward one side thereof and provides radiation in the form of a fan beam. Means are provided for rotating the assembly so that the fan beam impinges upon said body portion at a plurality of incident directions. Detector means for the radiation are positioned on the assembly opposite the source, enabling detection of radiation which traverses laterally and is not absorbed in the thin body section in which the aforementioned plane resides. The detector means is preferably of the ionization type, and may comprise an array of side-by-side mutually insulated strip electrodes, spaced from a common high voltage electrode. The principal axis of each electrode is oriented along a radius extending toward the radiation source, and the ionization space between such strip and the common electrode can be regarded as defining a cell the principal axis of which is similarly oriented. Collimating means overlie the detector means and serve to assure that the radiation incident on each such cell is only that which has passed through an appropriate element of the body portion being examined.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {6}
}