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### Applying an offset to a series

An offset is a correction made to a frame of reference. You can apply an offset, to align images.

Available offset types

The following table describes the two types of offsets.

Offset type | Meaning
Spatial offset | Apply a correction based on spatial relationship. For example, spatial offset is useful when the patient left the image device temporarily during the scan.
Frame count offset | Apply a correction based on the number of frames. For example, frame count offset is useful for simultaneous viewing of bilaterally similar anatomy when the patient was not leveled during the scan.

Steps for this task

To apply an offset:

| 1. | Unlink the series. See Linking and unlinking series.

| 2. | Display the image to which you want to apply an offset.

| 3. | Click the arrow beside the Link icon at the top of the viewport.

| 4. | From the menu that is displayed, point to Advanced Reg./Offset, and then specify the type of offset to apply. See Available offset types.

To... | Do this...
--- | ---
Apply a spatial offset |
| • | Select Offset by Spatial.
Apply a frame count offset |
| • | Select Offset by Frame Count.

The corresponding offset is applied and the series is re-linked to the other series.

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