Tomography

Details Tomography Tomography

1975-10-09

1977-06-28

Morrison, Malcolm A.

Registers

Transfer mechanism

Traveling pawl

128 2A, 250445R, G03B 4116

Patent

active

040327612

ABSTRACT:
Computerized axial tomographic apparatus provides sets of "edge readings" which relate to the absorption suffered by penetrative radiation on traversing respective paths through a part of interest in a body, the various paths being coplanar. These edge readings are processed to permit the evaluation of the absorption coefficients at a plurality of locations distributed over the part of the body in the irradiated plane. In accordance with the invention the necessity for such processing to involve large scale multiplication is overcome by employing a processing technique which utilizes Walsh functions.

REFERENCES:
patent: 3778614 (1973-12-01), Hounsfield
patent: 3784820 (1974-01-01), Miraldi
patent: 3852603 (1974-12-01), Muehllehner
patent: 3875412 (1975-04-01), Hozumi
patent: 3919552 (1975-11-01), Hounsfield
patent: 3924131 (1975-12-01), Hounsfield
patent: 3934142 (1976-01-01), Hounsfield
patent: 3936636 (1976-02-01), Percival
patent: 3996467 (1976-12-01), Froggatt et al.

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