Spiral scan computer tomography apparatus
AssigneeSiemens Aktiengesellschaft
InventorHeinrich Wallschlaeger
Life of this patent
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Abstract
A computer tomography apparatus undertakes a three-dimensional scanning of the examination subject with relative motion between the rotating measurement unit and the patient, the relative motion ensuing in the longitudinal direction of the patient support during the acquisition and processing of the detector data, so that a spiral scan is accomplished. For image reconstruction, data corresponding to the scanning of parallel slices are generated from the detector data by spiral interpolation, the interpolation being done with the detector data in the form of the relative intensities registered at the detector.
Claims4
A computer tomography apparatus comprising:
- means for conducting a spiral scan of an examination subject by directing radiation having an incident intensity at said subject and obtaining relative intensity signals representing relative intensity values for radiation passing through said subject;
- means for generating data representing an image of said examination subject, said image conforming to parallel slices of said examination subject, by spiral interpolation of said relative intensity values performed directly on said relative intensity signals;
- and
- means for constructing said image of said examination subject from said data.
A method for obtaining a computer tomogram of an examination subject comprising the steps of:
- conducting a spiral scan of an examination subject by directing radiation having an incident intensity at said subject and obtaining relative intensity signals representing relative intensity values for radiation passing through said subject;
- generating data representing an image of said examination subject, said image conforming to parallel slices of said examination subject, by spiral interpolation of said relative intensity values performed directly on said relative intensity signals;
- and
- constructing said image of said examination subject from said data.
Dependencies are inferred from the claim text.