X ray CT system

Details X ray CT system X ray CT system

2011-04-12

2011-04-12

Glick, Edward J (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

C378S098110, C378S098120

Reexamination Certificate

active

07924969

ABSTRACT:
The dual energy X-ray CT apparatus automatically optimizes a map for separation to achieve a high degree of separation accuracy and a reduction of dose.An X-ray attenuation coefficient acquired in the dual energy X-ray CT system is applied to a map for separation which represents a relationship between the X-ray attenuation coefficient and a composition of an object, thereby separating the composition of the object. The map formation unit for separation calculates an existing probability of each composition for each combination of multiple types of X-ray attenuation coefficients, and determines the composition having the largest existing probability as the composition corresponding to the combination of the X-ray attenuation coefficients, thereby forming the map for separation. This configuration allows a formation of the map for separation with respect to each imaging condition, and high degree of accuracy in separating composition can be achieved.

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Raz Carmi et al.; Material Separation with Dual-Layer CT; IEEE Nuclear Science Symposium Conference Record M03-367; 2005; pp. 1876-1878.

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