The Deformable Spatial Registration Information Object Definition (IOD) describes spatial relationships between images in one or more frames of reference via deformation grids and transformation matrices. The deformations and transformations describe to an application how to sample data from one or more Source RCSs into the Registered RCS.
The Registered RCS is the Frame of Reference specified within an instance of this IOD. The IOD may specify that only a subset of the entire Source RCS Frame of Reference is affected by the transformation, by specifying specific frames of image SOP Instances that use the Source Frame of Reference.
The deformation is described as a grid of offset vectors. Each grid element contains 3 values representing offset distances in the X, Y, and Z directions at the center position of the deformation grid element. The relationship between the data being deformed and the deformation grid is purely spatial. Therefore the resolution of the grid is independent of the data being deformed.
The E-R Model for the Deformable Spatial Registration IOD is identical to the E-R Model for the Spatial Registration IOD in Figure A.39-1.
Table A.39.2-1 DEFORMABLE SPATIAL REGISTRATION IOD MODULES
|Clinical Trial Subject||C.7.1.3||U|
|Clinical Trial Study||C.7.2.3||U|
|Clinical Trial Series||C.7.3.2||U|
|Spatial Registration Series||C.20.1||M|
|Frame of Reference||Frame of Reference||C.7.4.1||M|
|Enhanced General Equipment||C.7.5.2||M|
|Deformable Registration||Deformable Spatial Registration||C.20.3||M|
|Common Instance Reference||C.12.2||M|