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This guide explains how to use Annotation and Image Markup (AIM) on ClearCanvas Workstation. ClearCanvas

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is an open-source imaging platform. This guide explains key procedures for creating and working with AIM annotation objects. The intended audience for this guide is a biomedical researcher familiar with the AIM information model.

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  1. Select Tools > Preferences > AIM.
    The Options dialog box appears.

    AIM options dialog box

  2. Specify any of the following AIM preferences.

    OptionDescription
    Send New Annotations to caGrid

    If selected, the workstation will send new annotations to the assigned caGrid location. Also see Specifying AIM Data Service Preferences.

    By default, the Send New Annotations to caGrid option is disabled. You must enable this option in order to have new AIM XML documents sent to the AIM Data Service. If you have neither set the AIM Data Service destination nor enabled the Send New Annotations to caGrid option, you cannot send your existing AIM XML documents to the AIM Data Service.

    Store New Annotations LocallyIf selected, the workstation will store a copy of new annotations in the AIM XML format on the local computer. A user can assign where the AIM annotation documents can be stored on the local computer.
    Required User InformationIf selected, user credentials need to be entered before creating an AIM annotation document.
    Require Graphic Markup in AnnotationIf selected, a user must create at least one graphical drawing on an image before creating an AIM annotation document.
    Reset Template After Annotation Creation
     

    Use Crosshairs Instead of Arrows for Text CalloutsChange the image used when you create text callouts.
    Templates FolderIf entered, the directory will be used to search for AIM template XML documents.

  3. Click Apply.

Specifying Toolbar Preferences

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The following table describes four AIM tools that are available on the AIM on ClearCanvas Workstation.

Tool

Name

Description

AIM Template buttonImage Modified

AIM Template

Displays a template based form with a set of questions and choice(s) of answers for each question. A user can import a new AIM template to that location. Create new annotation objects by completely filling out this form and clicking the Create Annotation button.

AIM Object Locator buttonImage Modified

AIM Object Locator

Depicts available AIM objects in the currently displayed study without searching through every image in the study or series.

AIM Details buttonImage Modified

AIM Annotation Details

Provides the ability to view specific areas of a selected graphic markup for an existing annotation.

Closed Polygon Markup buttonImage Modified

Closed Polygon Markup

Allows creation of a free hand graphical markup. This tool can be used in addition to existing ClearCanvas tools in creating graphical markup.

AIM Template Tool

To activate the AIM template tool in Figure 1, click the AIM template tool button (#1). If you put the pin down (#2), you can detach the AIM Template tab by putting the mouse pointer at the header (#3) and dragging it out, as illustrated in Figure 2.

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Before you can add an annotation to an image, AIM on ClearCanvas Workstation verifies that the annotation you have drawn complies with the rules in the AIM template. AIM on ClearCanvas Workstation verifies new annotations according to the following rules:

Template ConditionVerification Condition
Template has multipoint geometric shapeLine or angular markup has to be drawn on image
Template has polyline geometric shapeRectangular or polygonal markup has to be drawn on image.
Template has circle or ellipse geometric shapeElliptical markup has to be drawn on image.
Template has point geometric shapeCross hair markup has to be drawn on image.

In addition to verifying specific new annotations, AIM on ClearCanvas Workstation also checks that no additional marks are on the image that the template does not allow.

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