X-ray or gamma ray systems or devices – Electronic circuit – Exposure timer
Patent
1990-12-14
1992-06-16
Howell, Janice A.
X-ray or gamma ray systems or devices
Electronic circuit
Exposure timer
378 62, 378207, 358111, H05G 164
Patent
active
051230372
ABSTRACT:
In order to represent the bone structure of a patient's body, acquisitions are made with different irradiation energies. The irradiations are compared with these two energies in order to deduce a two-dimensional projected image which is representative of the bone structure alone. To this end, there is assigned to each pixel in the projected images a value corresponding to the thickness of bone traversed by an x-ray which has terminated at said pixel. This value is obtained by calibrating the measuring system, detector cell by detector cell, so as to correct the spatial non-uniformities of the acquisition system.
REFERENCES:
patent: 4068306 (1978-01-01), Chen et al.
patent: 4571491 (1982-02-01), Vinegar et al.
patent: 4686695 (1987-08-01), Macovski
patent: 4980904 (1990-12-01), Sones et al.
Med. Phys. 13 (3), May/Jun. 1986, pp. 334-339, W. A. Kalender, et al., "Evaluation of a Prototype Dual-Energy Computed Tomographic Apparatus, 1. Phantom Studies .sup.a)".
Picard Catherine
Rougee Anne
Saint-Felix Didier
Trousset Yves
General Electric CGR S.A.
Howell Janice A.
Porta David P.
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