IMAGE PROVISION FOR REGISTRATION
First Claim
1. A device for providing a basis for registering a three-dimensional model of an anatomical region with two-dimensional projection images, comprising:
- a 3D imaging system (10) for deriving a three-dimensional model of an anatomical region at a phase of a periodic signal;
a 2D imaging system (11) for deriving two-dimensional projection images of a region which overlaps with the anatomical region reconstructed by the 3D imaging system;
a pre-selector (15) for selecting a subset of projection images out of the derived two-dimensional projection images, which are closest to the phase; and
a selector (16) for selecting a reference image for the registration from the subset of pre-selected projection images by choosing the projection image with the most contrast.
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Abstract
The invention relates to a device and a method for providing a basis for registering a three-dimensional model of an anatomical region with two-dimensional projection images, by deriving a three-dimensional model of an anatomical region at a phase of a periodic signal; deriving two-dimensional projection images of a region which overlaps with the anatomical region re-constructed as the three-dimensional model; pre-5 selecting a subset of projection images out of the derived two-dimensional projection images, which are closest to the phase; and selecting a reference image for the registration from the subset of pre-selected projection images by choosing the projection image with the most contrast.
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Citations
13 Claims
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1. A device for providing a basis for registering a three-dimensional model of an anatomical region with two-dimensional projection images, comprising:
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a 3D imaging system (10) for deriving a three-dimensional model of an anatomical region at a phase of a periodic signal; a 2D imaging system (11) for deriving two-dimensional projection images of a region which overlaps with the anatomical region reconstructed by the 3D imaging system; a pre-selector (15) for selecting a subset of projection images out of the derived two-dimensional projection images, which are closest to the phase; and a selector (16) for selecting a reference image for the registration from the subset of pre-selected projection images by choosing the projection image with the most contrast. - View Dependent Claims (2, 3, 4, 5, 13)
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6. A method of providing a basis for registering a three-dimensional model of an anatomical region with two-dimensional projection images, comprising the steps:
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deriving a three-dimensional model (S100) of an anatomical region at a phase of a periodic signal; deriving two-dimensional projection images (S101) of a region which overlaps with the anatomical region reconstructed as the three-dimensional model; pre-selecting (S103) a subset of projection images out of the derived two-dimensional projection images, which are closest to the phase; and selecting (S104) a reference image for the registration from the subset of pre-selected projection images by choosing the projection image with the most contrast. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification