Computer tomography apparatus

Details Computer tomography apparatus Computer tomography apparatus

2005-07-26

2005-07-26

Glick, Edward J. (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

C378S004000, C378S901000, C378S015000

Reexamination Certificate

active

06922457

ABSTRACT:
A computer tomography apparatus of this invention includes an x-ray tube configured to emit x-rays while rotating around an object to be examined, a radiation detector configured to have detection elements arranged in a plurality of rows along a slice-thickness direction, each row having a plurality of the detection elements configure to detect x-rays that had passed through the object, a data acquisition system configured to acquire projection data of the object using the output of the radiation detector, and a reconstructing unit configured to be capable of a first reconstruction method and a second reconstruction method, reconstruct an image based on the projection data using one of the first and second reconstruction method, wherein the x-rays are assumed to intersect perpendicularly with an axis of rotation of the x-ray tube in the first reconstruction method, and the second reconstruction method reconstructs the image using a cone angle information of the x-rays.

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L. A. Feldkamp et al., 1984 Optical Society of America, “Practical cone-beam algorithm”, J. Opt. Soc. Am. A/vo;l. 1, No. 6/Jun. 1984, pp. 612-619.

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