X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Reexamination Certificate
2007-02-08
2008-12-30
Kao, Chih-Cheng G (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
C378S018000, C378S098400
Reexamination Certificate
active
07471759
ABSTRACT:
The method is analytical, involves a single irradiation of the object at a plurality of incidences in order to obtain a first three-dimensional image of the total radiation received by the detector, but a double irradiation of a set of calibration phantoms, such as planar plates, in order to obtain their images of the total radiation and the scattered radiation. The three-dimensional image serves only to precisely evaluate, for each projection of the radiation through the object, the equivalent length of the material of the phantoms in order to obtain a similar scattered radiation. In a known manner, a ratio of scattered radiation layers is then calculated for the object and the phantoms according to the total radiation that they have received, and the scattered radiation of the object is obtained by the radiation scattered by the phantoms, which have been measured, and the ratio.
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Dinten Jean-Marc
Rinkel Jean
Artman Thomas R
Commissariat A l'Energie Atomique
Kao Chih-Cheng G
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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