Image reconstruction apparatus and process

Details Image reconstruction apparatus and process Image reconstruction apparatus and process

1981-03-20

1984-05-01

Krass, Errol A.

Boots, shoes, and leggings

364576, 378901, 382 6, G06F 1542, G01N 2300

Patent

active

044465211

ABSTRACT:
An image reconstruction apparatus of the present invention comprises units for measuring projection data from a number of angular directions within an angular range less than 180.degree. with respect to a subject, a unit for performing parallel displacement of the projection data so that the subject may substantially be located within a specific region corresponding to said angular range, a unit for calculating a Fourier coefficient for expanding the displaced that into a Fourier series, and units for reconstructing a slice image of the subject by means of the calculated Fourier coefficient.

REFERENCES:
patent: 4138721 (1979-02-01), Boyd
patent: 4205375 (1980-05-01), Inouye et al.
patent: 4274140 (1981-06-01), Watson
patent: 4305127 (1981-12-01), Heuscher
Tamon Inouye, "Image Reconstruction With Limited Angle Projection Data," IEEE Transaction on Nuclear Science, vol. NS-26, No. 2, pp. 2666-2669 (Apr. 1979).
Kowalski, "Fast 3-D Scanning Systems Using a Limited Tilting Angle," Applied Optics, vol. 16, No. 6, pp. 1686-1690 (1977).

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