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### Applying registration to series

When series are in different frames of reference, scrolling a series does not display the same anatomical region in other linked series.

Apply registration to the series to adjust the link alignment, so that they share the common frame of reference. Registration is applied by identifying the anatomical reference points for the series you want to align. The anatomical reference points are called registration points.

Note: You can also align images within a series. See Applying an offset to a series.

Available registration types

The following table describes the two types of registrations.

Registration type | Meaning
Quick registration | The center of each displayed image is used as a registration point.
Precise registration | Two or more registration points are identified manually. Any location on the displayed images can be used as a registration point.

Applying quick registration

To apply quick registration:

| 1. | Link all series to which you want to apply quick registration. See Linking and unlinking series.

| 2. | For each linked series, scroll to the image whose center you want to use as a registration point.

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

| 4. | From the menu that is displayed, select Quick Registration.

Quick registration is applied to the series. Scrolling a series displays the corresponding images in the linked series.

Applying precise registration

To apply precise registration:

| 1. | Display the images to which you want to assign the registration points.

| 2. | Click the arrow beside the Link icon at the top of a viewport.

| 3. | From the menu that is displayed, point to Advanced Reg./Offset, and then select Precise Registration.

The Precise Registration dialog box is displayed.

| 4. | Specify whether you want to use two or more registration points:

To... | Do this...
Use two registration points |
| • | Select the Always done after two points check box.
Use more than two registration points |
| • | Clear the check box.

| 5. | Click the image where you want to use as the first registration point.

The first registration point is indicated on the image.

In addition, the Precise Registration dialog box is displayed, asking you to identify the second registration point.

| 6. | Click the image you want to use as the second registration point. The second registration point must be in a different frame of reference.

The second registration point is now indicated on the image.

| 7. | If in step 4, you have specified to use more than two registration points, repeat step 6, until all the registration points are identified.

| 8. | Click Done.

Precise registration is applied to the series. Scrolling a series displays the corresponding images in the linked series.

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