Geometrical instruments
Patent
1977-12-23
1980-05-06
Smith, Alfred E.
Geometrical instruments
250445T, A61B 600, A61B 602, H01R 3900
Patent
active
042014301
ABSTRACT:
Scanning apparatus is disclosed for use in computerized axial tomography systems. The apparatus 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. A source of penetrating radiation is mounted on the assembly toward one side thereof and provides radiation in the form of a fan beam. Signal processing and conditioning means mounted on the assembly and movable therewith, receive the output signals from the detector means and amplify and convert same to digital form. Slip ring interconnection means, rotatable with the assembly, receive the outputs from the signal processors and conditioners and interfeed these signals to a computerized image reconstruction station. Slip rings rotatable with the assembly also provide interconnection enabling power and control inputs to the radiation source and to other portions of the apparatus. The assembly is continuously rotatable through successive 360 degree rotations and the examination sequence may be initiated at any point in the rotation of the assembly. The detector comprises an array of elements and means are provided for adjusting the gains of each channel associated with the individual detector elements as an incident of the examination process, thereby enabling compensation for drift in the channels.
REFERENCES:
patent: 2773247 (1956-12-01), Erhardt, Jr.
Dinwiddie Kendall L.
Racz Janos A.
Seppi Edward J.
Cole Stanley Z.
General Electric Company
Grigsby T. N.
Herbert Leon F.
Smith Alfred E.
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