System and method for quantifying the quality of motion correction in image registration
AssigneeSiemens Medical Solutions USA, Inc.
InventorGerardo Valadez
Life of this patent
Estimating the term…
Abstract
A method of evaluating the quality of a deformation field includes providing a deformation field from a first domain to a second domain, where a deformation field Φ=(φx,φy,φz) that transforms a point (x,y,z) in the first domain to a point (X,Y,Z) in the second domain is defined by { X = ϕ x ( x , y , z ) = x + u x ( x , y , z ) Y = ϕ y ( x , y , z ) = y + u y ( x , y , z ) Z = ϕ z ( x , y , z ) = z + u z ( x , y , z ) , where ux, uy, uz are displacement fields, and calculating a quality factor as a function of the of the displacement fields and the Jacobian matrix DΦ(x,y,z) of the deformation fields. The quality factor is a measure of the quality of said deformation field.
Claims24
A method of evaluating the quality of a deformation field, said method comprising the steps of:
- providing a deformation field from a first domain to a second domain;
- calculating a quality factor of the deformation field;
- and
- rejecting said deformation field if its quality factor has magnitude less than a predetermined value.
A method of evaluating the quality of a deformation field, said method comprising the steps of:
- providing a deformation field from a first domain to a second domain, wherein said deformation field Φ=(φx,φy,φz) that transforms a point (x,y,z) in the first domain to a point (X,Y,Z) in the second domain comprises
- {
-
- X
- =
- ϕ
- x
-
- (
- x
- ,
- y
- ,
- z
- )
- =
- x
- +
- u
- x
-
- (
- x
- ,
- y
- ,
- z
- )
-
- Y
- =
- ϕ
- y
-
- (
- x
- ,
- y
- ,
- z
- )
- =
- y
- +
- u
- y
-
- (
- x
- ,
- y
- ,
- z
- )
- ,
-
- Z
- =
- ϕ
- z
-
- (
- x
- ,
- y
- ,
- z
- )
- =
- z
- +
- u
- z
-
- (
- x
- ,
- y
- ,
- z
- )
- wherein ux, uy, uz are displacement fields;
- and
- calculating a quality factor as a function of the of the displacement fields and the Jacobian matrix DΦ(x,y,z) of the deformation fields, wherein said quality factor is a measure of the quality of said deformation field.
A program storage device readable by a computer, tangibly embodying a program of instructions executable by the computer to perform the method steps for evaluating the quality of a deformation field, said method comprising the steps of:
- providing a deformation field from a first domain to a second domain;
- and
- calculating a quality factor of the deformation field;
- and
- rejecting said deformation field if its quality factor has magnitude less than a predetermined value.
Dependencies are inferred from the claim text.