Active catheter reconstruction for interventional magnetic resonance imaging
First Claim
1. A method for device visualization, comprising:
- receiving a set of physical characteristics including a description of spatial relationships of a plurality of markers within a device;
acquiring radiographic data of the device within a subject;
identifying an approximate location of each of the plurality of markers within the radiographic data;
constructing a trajectory function for the device within the subject based on the identified approximate locations of each of the markers and the received set of physical characteristics;
constructing a 2D section function for the device based on the set of physical characteristics, wherein the 2D section function is substantially circular with a radius that is variably dependent upon a known thickness of the device over the trajectory function;
calculating a plurality of cross-sectional slices by calculating a shape of the 2D section function at intervals over the trajectory function;
generating a 3D model for the device by combining each of the plurality of calculated cross-sectional slices; and
displaying a rendering of the 3D model on a display device.
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Accused Products
Abstract
A method for device visualization includes receiving a set of physical characteristics including a description of spatial relationships of a plurality of markers within a device. Radiographic data of the device within a subject is acquired. An approximate location of each of the plurality of markers is identified within the radiographic data. A trajectory function is constructed for the device within the subject based on the identified approximate locations of each of the markers and the received set of physical characteristics. A section function is constructed for the device based on the set of physical characteristics and a 3D model is generated for the device based on the constructed trajectory function and the section function. A rendering of the 3D model is displayed on a display device.
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Citations
22 Claims
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1. A method for device visualization, comprising:
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receiving a set of physical characteristics including a description of spatial relationships of a plurality of markers within a device; acquiring radiographic data of the device within a subject; identifying an approximate location of each of the plurality of markers within the radiographic data; constructing a trajectory function for the device within the subject based on the identified approximate locations of each of the markers and the received set of physical characteristics; constructing a 2D section function for the device based on the set of physical characteristics, wherein the 2D section function is substantially circular with a radius that is variably dependent upon a known thickness of the device over the trajectory function; calculating a plurality of cross-sectional slices by calculating a shape of the 2D section function at intervals over the trajectory function; generating a 3D model for the device by combining each of the plurality of calculated cross-sectional slices; and displaying a rendering of the 3D model on a display device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for providing visualization for intervention guidance, comprising:
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acquiring a radiographic study; identifying a set of markers within a device within the acquired radiographic study; fitting a curve to the identified set of markers according to locations of the identified set of markers within the radiographic study and a prior knowledge of physical characteristics of the device; calculating a plurality of cross-sectional slices by calculating a shape of a deformable model of the device at intervals over the fitted curve; generating a 3D model for the device by combining each of the plurality of calculated cross-sectional slices; and displaying a rendering of the 3D model on a display device for intervention guidance, wherein the a prior knowledge of physical characteristics of the device includes distances between markers within the device and a maximum possible degree of curvature or bending of the device. - View Dependent Claims (21)
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22. A computer system comprising:
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a processor; and a non-transitory, tangible, program storage medium, readable by the computer system, embodying a program of instructions executable by the processor to perform method steps for device visualization, the method comprising; receiving a set of physical characteristics including a description of spatial relationships of a plurality of markers within a device; acquiring a radiographic scan of the device within a subject; identifying an approximate location of each of the plurality of markers within the radiographic scan; constructing a mathematical spline function for the device within the subject based on the identified approximate locations of each of the markers and the received set of physical characteristics; constructing a 2D section function for the device based on the received set of physical characteristics, wherein the 2D section function is substantially circular with a radius that is variably dependent upon a known thickness of the device over the trajectory function; calculating a plurality of cross-sectional slices by calculating a shape of the 2D section function at intervals over the trajectory function; generating a 3D model for the device by combining each of the plurality of calculated cross-sectional slices; and displaying a rendering of the 3D model on a display device.
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Specification