Ct method for the examination of a cyclically moving object
A periodic and moving technology, applied in the fields of radiological diagnosis instruments, applications, medical science, etc., can solve the problems of huge computing power, infeasibility, etc.
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[0026] The computed tomography apparatus represented in FIG. 1 comprises a gantry 1 which is rotatable about an axis of rotation 14 parallel to the z-direction of the x, y, z-coordinate system represented in FIG. 1 . In addition, the gantry is driven by a motor 2 with a preferably constant but adjustable angular velocity. A radiation source S, such as an X-ray device, is fixed to the gantry. This is provided with a collimator arrangement 3 which forms a cone beam 4 from the radiation produced by the radiation source S, i.e. has A bundle of finite extensions other than zero.
[0027] The beam 4 penetrates an examination region 13, where an object such as a patient may be located on a patient examination platform (also not shown). The inspection zone 13 has a cylindrical shape. After passing through the examination zone 13, the X-ray beam strikes a two-dimensional detector unit 16 fixed to the gantry 1, which detector unit comprises a plurality of detector rows with a plurali...
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