Constrained-curve correlation model
First Claim
Patent Images
1. A method, comprising:
- acquiring a plurality of data points representative of a corresponding plurality of positions over time of an external marker disposed on a surface of an object;
acquiring an image of a target internal to the object; and
identifying a non-linear path of movement of the target based on the plurality of data points and the image using a parameterization function to approximate the non-linear path of movement, wherein the parameterization function comprises a constrained curve that intersects a principal axis of the plurality of data points at a first intersection and at a second intersection, and the constrained curve is tangent to the principal axis at the first and second intersections.
9 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus to develop an advanced correlation model of movement of a target within a patient, which needs less data points and can adapt to the changes of respiration behavior automatically.
68 Citations
25 Claims
-
1. A method, comprising:
-
acquiring a plurality of data points representative of a corresponding plurality of positions over time of an external marker disposed on a surface of an object; acquiring an image of a target internal to the object; and identifying a non-linear path of movement of the target based on the plurality of data points and the image using a parameterization function to approximate the non-linear path of movement, wherein the parameterization function comprises a constrained curve that intersects a principal axis of the plurality of data points at a first intersection and at a second intersection, and the constrained curve is tangent to the principal axis at the first and second intersections. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. An apparatus, comprising:
-
an data storage device to store a plurality of displacement points of an external marker and a corresponding plurality of images of a target; and a processing device coupled to the data storage device, the processing device to identify a non-linear path of movement of the target using a parameterization function to approximate the non-linear path of movement, wherein the parameterization function comprises a constrained curve that intersects a principal axis of the plurality of data points at a first intersection and at a second intersection, and the constrained curve is tangent to the principal axis at the first and second intersections. - View Dependent Claims (17, 18, 19, 20, 21)
-
-
22. An apparatus, comprising:
-
means for receiving a plurality of data points representative of a corresponding plurality of positions over time of an external marker disposed on a surface of an object; means for receiving an image of a target internal to the object; and means for reducing a number of images acquired in developing a correlation model that maps the movement of the external marker to a target location of the target. - View Dependent Claims (23, 24)
-
-
25. A computer readable medium having instructions thereon, which when executed by a processing device, cause the processing device to perform the following operations comprising:
-
receiving a plurality of displacement points over time of an external marker attached to a body; receiving a image of a target internal to the body; and developing a correlation model based on the plurality of displacement points and the image using a parameterization function that includes a constrained curve that intersects a principal axis of the plurality of data points at a first intersection and at a second intersection, and the constrained curve is tangent to the principal axis at the first and second intersections, wherein the correlation model maps the movement of the external marker to a target location of the target.
-
Specification