Boots – shoes – and leggings
Patent
1975-12-23
1979-04-10
Ruggiero, Joseph F.
Boots, shoes, and leggings
250445T, 364515, G06F 1534, G01T 1166, G01N 2300
Patent
active
041492480
ABSTRACT:
In an apparatus and method for reconstructing data, a beam of radiation in the shape of a fan is passed through an object lying in the same quasi plane as the radiation source and non-absorption and non-scatter thereof is recorded on oppositely situated detectors aligned with said source of radiation. There is relative rotation between the source-detector configuration and the object within the quasi-plane. Periodic values of the detected radiation are taken, convolved with certain functions, and back-projected to produce a two-dimensional output picture on a visual display illustrating a facsimile of the object slice. A series of two-dimensional pictures obtained simultaneously or serially can be combined to produce a three-dimensional portrayal of the entire object. The invention is the first device which uses a fan beam source of radiation coupled with the application of a convolution method of data reduction with no intervening reordering of fan beam rays, thereby eliminating errors and delays in computation time which would be involved in such reordering. The invention is the first method for providing an exact reconstruction of a two-dimensional picture of an object slice from a series of one-dimensional projections of radiation not absorbed by the slice when the superior fan beam source is employed.
REFERENCES:
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"Image Processing for 2-D and 3-D Reconstruction from Projections: Theory and Practice in Medicine and the Physical Sciences", Aug. 4-7, 1975, Technical Digest-includes post-deadline papers-see specifically, PDP-11, Pang and Genna-A Fourier Convolution for Fan Geometry Reconstruction Algorithm.
Lakshminarayanan, -"Reconstruction from Divergent Ray Data", Technical Report No. 92-Suny at Buffalo, Dept. of Computer Science-Jan. 1975.
Gordon et al., "Image Reconstructions from Projections", Scientific American, Oct., 1975, p. 56.
Marr, "On the Reconstruction of a Function on a Circular Domain from a Sampling of its Line Integrals", Journal of Mathematical Analysis and Applications 45, 357-374 (1974).
"Techniques of Three-Dimensional Reconstruction", Proceedings of an International Work Shop held at Brookhaven National Laboratory, Upton, New York, Jul. 16-19, 1974.
Boyd et al., "A High Pressure Xenon Proportional Chamber for X-Ray Laminographic Reconstruction using Fan Beam Geometry, IEEE Trans. Nucl. Science, NS-21, 184 (1973).
Drieke et al., "Convolution Reconstruction of Fan Beam Reconstructions", Computer Graphics and Image Processing, Jun. 1975, revised Nov. 1975.
Cole Stanley Z.
Herbert Leon F.
Radlo Edward J.
Ruggiero Joseph F.
Varian Associates Inc.
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