Tomosynthesis imaging system and method
First Claim
1. A tomosynthesis method for creating a three-dimensional reconstruction of a target element comprising:
- acquiring radiation absorbance images of the target element through a limited plurality of angles; and
applying an iterative reconstruction algorithm to generate the three-dimensional reconstruction of the target element;
wherein the iterative reconstruction algorithm is applied using cone-beam forward projection and back projection.
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Abstract
A system for three-dimensional tomosynthesis imaging of a target element is provided having an image acquisition element and a processor. The image acquisition element obtains a plurality of images of the target element from a plurality of angles and includes a radiation source that is positionable at a plurality of angles with respect to the target element and a radiation detector. The radiation detector is positioned so as to detect radiation emitted by the radiation source passing through the target element and determine a plurality of attenuation values for radiation passing through the target element to establish a radiation absorbance projection image of the target element for a particular radiation source angle. The processor is configured to apply an iterative reconstruction algorithm to the radiation absorbance projection images of the target element obtained from a plurality of radiation source angles to generate a three-dimensional reconstruction of the target element. The system can gain further accuracy where the iterative reconstruction algorithm is applied using cone-beam forward projection and back projection.
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Citations
34 Claims
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1. A tomosynthesis method for creating a three-dimensional reconstruction of a target element comprising:
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acquiring radiation absorbance images of the target element through a limited plurality of angles; and
applying an iterative reconstruction algorithm to generate the three-dimensional reconstruction of the target element;
wherein the iterative reconstruction algorithm is applied using cone-beam forward projection and back projection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for three-dimensional tomosynthesis imaging of a target element comprising:
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an image acquisition element for obtaining a plurality of images of the target element from a plurality of angles having;
a radiation source positionable at a plurality of angles with respect to the target element; and
a radiation detector positioned so as to detect radiation emitted by the radiation source passing through the target element and determine a plurality of attenuation value for radiation passing through the target element to establish a radiation absorbance projection image of the target element for a particular radiation source angle; and
a processor configured to apply an iterative reconstruction algorithm to the radiation absorbance projection images of the target element obtained from a plurality of radiation source angles to generate a three-dimensional reconstruction of the target element wherein the iterative reconstruction algorithm is applied using cone-beam forward projection and back projection. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A computer program for three-dimensional tomosynthesis imaging of a target element from a plurality of radiation absorbance projection images obtained at a different angles from an image acquisition element having a radiation source positionable at a plurality of angles with respect to the target element and a radiation detector positioned so as to detect radiation emitted by the radiation source passing through the target element and determine a plurality of attenuation value for radiation passing through the target element to establish a radiation absorbance projection image of the target element for a particular radiation source angle, the computer program code being embodied in a computer readable medium and comprising:
computer program code for applying an iterative reconstruction algorithm to the radiation absorbance projection images of the target element obtained from a plurality of radiation source angles to generate the three-dimensional reconstruction of the target element wherein the iterative reconstruction algorithm is applied using cone-beam forward projection and back projection. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
Specification