• Object ID: 00000018WIA3016B970GYZ
  • Topic ID: id_40024338 Version: 1.3
  • Date: Mar 29, 2022 2:25:29 PM

Use integrated integration for comparison of 3D images

Before you begin

Consider this information before you use Integrated Registration.
  • Integrated Registration provides a means for comparison of three-dimensional images. Once an initial transform has been defined, slices from both data sets are displayed with the same orientation, the display cursor is linked and graphics are drawn simultaneously on both data sets.
  • In Integrated Registration protocols, the Link/Unlink feature (used for synchronizing the 3D cursor and performing registration) controls only the synchronization of the 3D cursor. When Integrated Registration is activated as a tool in Integrated Registration compatible protocols, the Link/Unlink feature works as defined in Volume Viewer. Note, however, that certain restrictions may apply to the Link/Unlink capabilities, depending on the actual protocol in which Integrated Registration is used as a tool.

About this task

Use these steps to improve data interpolation. It is optimized when both series are 3D volumes. It is used to align two MR series that are misaligned in the X, Y and Z axis or all three directions.

Step-by-step instructions

  1. From the Patient list, click the two series to be aligned.
    In this example, the patient had a 3D T1 exam with and without contrast. Between the two series the patient was moved out of the scanner and sat up. Thus, the post contrast series is not completely aligned with the pre contrast series due to patient movement.
    Figure 1. Patient list
  2. From the Sessions App, click on a Volume Viewer application. For details, see Open MR General Review (Volume Viewer).
    After the selected series are loaded, Integrated Registration defines a Reference and a Registered series using the following principles (note that the application sets the Reference series first):
    • If the selected series are the same, and the series are in different exams, Integrated Registration selects the Reference series from the earlier exam.
    • If the selected series are the same, and the series are in the same exam, the application selects the series with the most slices and the series with the biggest FOV from the MR non-localizer series.
    • After the Reference series is set, the application defines the registered series, using the guidelines above (except when there is only one exam and there are only MR modalities in the exam and the Reference series is not Diffusion. In this case, Integrated Registration first observes that the series to be selected has B value > 0, then applies the selection principles.
  3. If desired, from the Layout and Review options menu, select Split layout and 2 on 1 format to view the two data sets side by side. For details, see Use Split layout to add a customized view.
    Figure 2. Example of layout with two series side-by-side
  4. From the MR General Review work area, in the upper right corner, click the Preferences icon ().
  5. From the Preferences menu, click Tools to display the Preferences screen.
Figure 3. Preferences menu
  1. From the Preferences screen, click the Integrated Registration tab.
    Figure 4. Integrated Registration tab
  2. From the Integrated Registration tab, complete the following steps.
    1. Select the Automatically Register upon loading with checkbox.
    2. From the pulldown, select Standard Registration.
    3. Select the Automatically align planes to reference series checkbox.

      Result

      This selection considers the third rotation of a view.
    4. Click the X in the upper right corner to close the Preferences screen.
  3. To further optimize the image registration, from the Visualization toolbar, click the Integrated Registration icon () to view the Integrated Registration screen.
    Figure 5. Integrated Registration screen
    1. From the Volume table list, if you are not satisfied with the results of the automatic Reference and Registered series selection, right-click a series and set it as Reference () or Registered ().
    2. From the Registration panel, the following options are available.
      Table 1. Registration panel options
      OptionDescription
      Auto Registration

      		Use to perform an automatic registration.Click the arrow to view a list of automatic registration algorithms available for a given Reference and Registered series pair. Note that registration algorithms are defined for Body and Neuro use cases (anatomies or protocols).
      Manual

      		Use to perform a manual registration.
      Landmark

      		Use to perform a landmark based registration.
      Undo/Redo

      		Undo transform to undo the last rigid transformation performed during registration (including the transformations performed during placing landmarks).Redo transform to redo the last undone action.
      Center

      		Use to center the fixed and registered volumes.
      Reset

      		Use to reset the registered series to its original DICOM position. This takes effect on every series that is in the same group with the registered one.
      Quality Check Tools

      		Use to check the accuracy of registration, (Fused, Inverse, Tiles and Window views).
      Link Planes

      		Use to display all views either in the Reference or the Registered (i.e., moving) series’ plane. Reference is activated by default.
    3. Make selections from the Validate/Export panels.
      Figure 6. Validate/Export panel
      Figure 7. Export panel