Registration to Localizer Sequence Attribute
| Tag | (0022,1465) |
|---|---|
| Type | Optional (3) |
| Keyword | RegistrationToLocalizerSequence |
| Value Multiplicity | 1 |
| Value Representation | Sequence (SQ) |
Registration of current Instance to a localizer SOP Instance referenced in Attribute Referenced Instance Sequence (0008,114A).
See Section C.8.28.2.1.2 for an example.
Section C.8.28.2.1.2
C.8.28.2.1.2 Referenced Instance Sequence
Equipment generating an ophthalmic map (OPM) image, may also obtain an accompanying "reference/localizer" image. This "reference/localizer" image serves the purpose of orienting and registering the OPM image to the actual retinal location. For example, a fundus photo may be obtained with ophthalmic tomography (OPT). When the retinal thickness map is generated based on OPT data, the OPM is registered with pixel precision to the fundus photo. This "reference/localizer" image is referenced in the OPM SOP Instance using the Attribute Referenced Instance Sequence (0008,114A).
An example of a "reference/localizer" image and its relationship to an OPM image is shown in Figure C.8.28.2.1-1. Legend: ( A ) a fundus photo is taken as the "reference/localizer" image. The green box indicates the area the OPT scans are obtained. ( B ) The retinal thickness map (OPM object) is overlaid on the "reference/localizer" fundus photo to show the correspondence. These examples could be referenced from different types of SOP Classes, such as Color Softcopy Presentation State Storage (referencing the OP SOP Instance of a fundus photo), True Color Secondary Capture Image Storage, Encapsulated PDF, etc. The Purpose of Reference Code Sequence (0040,A170) code is set to (121311, DCM, "Localizer") for example A. Registration to Localizer Sequence (0022,1465) would be used for example B.
Figure C.8.28.2.1-1. Reference/Localizer Image Related to OPM Image