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US 2006/0153328 A1Published application
Computed tomography device and method with three-dimensional backprojection
AssigneeKoninklijke Philips Electronics N.V.
InventorsJens-Peter Schlomka, Michael Grab
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Abstract
The invention relates to a computed tomography method in which an examination zone is irradiated along a circular trajectory by a fan-shaped radiation beam. Radiation coherently scattered in the examination zone is measured by a detector unit, the variation in space of the scatter intensity in the examination zone being reconstructed from said measuring values. Reconstruction is performed by back projection in a volume which is defined by two linearly independent vectors of the rotational plane and a wave vector transfer.
Claims7
A computed tomography method comprising the steps of:
- a) generating, using a radiation source and a diaphragm arrangement which is arranged between the examination zone and the radiation source, a fan beam which traverses an examination zone or an object present therein,
- b) generating relative motions, comprising a rotation about an axis of rotation, between the radiation source on the one side and the examination zone or the object on the other side,
- c) acquiring measuring values which are dependent on the intensity of the radiation by means of a detector unit which detects, during the relative motions, the primary radiation from the fan beam and radiation which is coherently scattered in the examination zone or on the object,
- d) reconstructing a CT image of the examination zone from the measuring values, during which reconstruction a back projection is carried out in a volume which is defined by two linearly independent vectors of the rotational plane and a wave vector transfer.
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Dependencies are inferred from the claim text.