Method of obtaining a uniquely determined cross-sectional recons

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250416R, 250445R, G01N 2308, G06F 1542

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active

041288777

ABSTRACT:
A method of obtaining a uniquely determined reconstruction of a cross-section of an object from a number of projected images of the object. X-rays are directed to pass through the object in parallel rays to project an image of the object onto a detector. Each projection is made at an angle selected in accordance with certain critical parameters and measured from a predetermined reference. The critical parameters include the resolution of the reconstruction to be made and the required resolution in the projection data for each projection. The projection data so obtained is then mathematically combined to produce a grid-like reconstruction on a display unit. If desired, the method includes a technique for improving resolution in the reconstruction by obtaining additional and overlapping projection data, yet maintaining the uniqueness of the reconstruction.

REFERENCES:
patent: 3983399 (1976-09-01), Cox, Jr. et al.
patent: 4044240 (1977-08-01), Cox, Jr. et al.
patent: 4063097 (1977-12-01), Barrett et al.
Cho, Z. H.; General Views on 3-D Image Reconstruction and Computerized Transverse Axial Tomography; IEEE Trans. on Nuclear Science, vol. NS-21, Jun. 1974, pp. 44-70.
Chang et al.; Analog Reconstruction from X-Ray Projections; IBM Tech. Disc. Bulletin, vol. 15, No. 12, May 1973, pp. 3712-3714.

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