Process and apparatus for generating a tomographic image of a th

Details Process and apparatus for generating a tomographic image of a th Process and apparatus for generating a tomographic image of a th

1985-05-28

1987-10-06

Howell, Janice A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

378 4, 378 99, H04N 532, H05G 164

Patent

active

046986715

ABSTRACT:
The invention relates to a procedure and to equipment for generating a tomographic image of a three-dimensional object in a sectional plane (P). This procedure is of the type whereby the object is irradiated at various angles of incidence by beams converging on the sectional plane (P) and by detecting the radiation that has passed through the object for each angle of incidence in order to generate an electrical image signal. In the invention, the various image signals thus generated are processed by comparing their values at each point and by selecting for each image point that signal value which corresponds to the least radiation-attenuation; the selected values provide a synthesized signal representing the tomographic image. The procedure of the invention allows obtaining a tomographic image strictly free of the blurred traces due to the points located outside the sectional plane (P).

REFERENCES:
patent: 4437161 (1984-03-01), Anderson
patent: 4516261 (1985-05-01), Harding et al.

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