CT imaging system with independently movable multi-resolution de

Details CT imaging system with independently movable multi-resolution de CT imaging system with independently movable multi-resolution de

1995-10-23

1998-02-10

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 19, 378 22, 378 26, G01N 2300

Patent

active

057177325

ABSTRACT:
A system is provided for acquiring data for use in constructing a CT image of an object having a region of special interest, the system generally including an x-ray cone-beam source and an array detector having first and second zones, the resolution of the first zone being greater than the resolution of the second zone. Relative movement is established between the source and the object along a first path of translation, to position the source in a succession of view positions with respect to the object. The detector is moved along a second path of translation, which is substantially parallel to the first path, to position the detector at a succession of detector positions, each corresponding to one of the view positions. At each view position, the source is operated to project the beam toward the object, the beam axis being directed to intersect both the geometric center of the region of special interest, and the center point of the first resolution zone of the detector. The boundary of the first detector resolution zone is selected to substantially coincide with the boundary of the image of the special interest region when the detector is located at a detector position at which such image is of maximum dimensions.

REFERENCES:
patent: 4442534 (1984-04-01), Haendle et al.
patent: 5355309 (1994-10-01), Eberhard et al.

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