DOSE-SPARING TOMOGRAPHIC IMAGING
First Claim
1. A method comprising:
- emitting a first plurality of radiation beams from respective ones of a first plurality of locations along a first arc;
acquiring a first plurality of projection images of a target based on the first plurality of radiation beams;
emitting a second plurality of radiation beams from respective ones of a second plurality of locations along a second arc;
acquiring a second plurality of projection images of the target based on the second plurality of radiation beams; and
generating a three-dimensional image of the target based on the first plurality of projection images and the second plurality of projection images,wherein a density of the first plurality of locations along the first arc is less than the density of the second plurality of locations along the second arc.
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Accused Products
Abstract
A system includes emission of a first plurality of radiation beams from respective ones of a first plurality of locations along a first arc, acquisition of a first plurality of projection images of a target based on the first plurality of radiation beams, emission of a second plurality of radiation beams from respective ones of a second plurality of locations along a second arc, acquisition of a second plurality of projection images of the target based on the second plurality of radiation beams, and generation of a three-dimensional image of the target based on the first plurality of projection images and the second plurality of projection images, wherein a density of the first plurality of locations along the first arc is less than the density of the second plurality of locations along the second arc.
In some aspects, at least one of the first plurality of radiation beams exhibits a first divergence angle, and at least one of the second plurality of radiation beams exhibits a second divergence angle different from the first divergence angle.
8 Citations
18 Claims
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1. A method comprising:
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emitting a first plurality of radiation beams from respective ones of a first plurality of locations along a first arc; acquiring a first plurality of projection images of a target based on the first plurality of radiation beams; emitting a second plurality of radiation beams from respective ones of a second plurality of locations along a second arc; acquiring a second plurality of projection images of the target based on the second plurality of radiation beams; and generating a three-dimensional image of the target based on the first plurality of projection images and the second plurality of projection images, wherein a density of the first plurality of locations along the first arc is less than the density of the second plurality of locations along the second arc. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system comprising:
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an emission device to emit a first plurality of radiation beams from respective ones of a first plurality of locations along a first arc, and to emit a second plurality of radiation beams from respective ones of a second plurality of locations along a second arc; an imaging device to acquire a first plurality of projection images of a target based on the first plurality of radiation beams, and to acquire a second plurality of projection images of the target based on the second plurality of radiation beams; and a processor to generate a three-dimensional image of the target based on the first plurality of projection images and the second plurality of projection images, wherein a density of the first plurality of locations along the first arc is less than the density of the second plurality of locations along the second arc. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method comprising:
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acquiring a three-dimensional image including a target volume and one or more other volumes of a patient; and determining, based on the three-dimensional image, a distribution of locations from which respective imaging beams are to be emitted to generate projection images of the target volume from which a second three-dimensional image of the target volume may be generated, wherein the distribution of locations exhibits a non-uniform density. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification