Method for producing tomographic images using direct Fourier inv

Details Method for producing tomographic images using direct Fourier inv Method for producing tomographic images using direct Fourier inv

1989-08-08

1991-02-05

Smith, Jerry

Boots, shoes, and leggings

3644132, G06F 1542

Patent

active

049910930

ABSTRACT:
The present invention is a method for examining at least a portion of an object using penetration radiation. The method includes the steps of transmitting radiation from an external source through the object in a plurality of coplanar rays, detecting the attenuated transmitted radiation after it has passed through the object, determining the projection data for said rays, and inverting said projection data to generate the distribution of the attenuation coefficient, wherein said inverting step includes the Direct Fourier Inversion Method such that the projection data is padded and the Fourier coefficients are filtered.

REFERENCES:
Robert M. Lewitt, "Reconstruction Algorithms: Transform Method", 1983, pp. 390-402.
Henry Stark, "Direct Fourier Reconstruction in Computer Tomography", 1981, pp. 232-244.

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