Computer tomography apparatus having a partial ring x-ray source

Details Computer tomography apparatus having a partial ring x-ray source Computer tomography apparatus having a partial ring x-ray source

1992-11-24

1994-12-27

Dzierzynski, Paul M.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 10, 378901, 36441317, G01N 23083

Patent

active

053772490

ABSTRACT:
A computer tomography apparatus has an anode in the form of a partial ring along which a focus is electronically moved to generate a scan beam from different directions, and a partial ring detector which generates a number of data sets from the attenuated radiation at the different directions, includes a computer wherein the data sets are weighted independently of the measured values so that image reconstruction can be undertaken with a standard computer tomography method, such as convolution and back-projection. The weighting is selected so that the boundaries of regions having constant values represent smooth curves in the sinogram. The image can thereby be reconstructed without complementary interpolation, which is normally required in computer tomography systems having a partial ring x-ray source and detector.

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