Inobitec DICOM Viewer

8.3. Building Contours

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Functionality is available in a separate module which is activated in the Pro edition for an extra fee
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The functional parameters of the left and the right ventricles are calculated on the basis of the contours built. Contours can be built separately for each slice and phase in the window with the SAX merged series. The contour boundaries are shown as points on the slices in the window with the merge LAX series. If two or more contours were built for one phase, the points can be connected by segments. You cannot build contours in the window with a LAX merged series.

To simplify the process of building contours, we recommend enabling the display of slices scout lines in the window selected (see Section 2.24).

8.3.1 Building Contours Manually

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Functionality is available in a separate module which is activated in the Pro edition for an extra fee
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You can use the following tools to build contours manually:

The choice of the tool depends on the region of interest and the results of the analysis required.

To build a contour, proceed as follows:

  1. Open the study in the Cardiac function analysis tab (see Section 8.1).

  2. Activate one of the contour building tools with the left, right, or middle mouse button. To continue work with the same tool, use the button with which the tool was activated. For details on tool management, see Section 1.14. Build the contour in one of the following ways:

    • building contours manually. In the window with the SAX merged series, build a contour around the selected area while holding the button with which the tool was activated. To complete the contour, release the mouse button. To cancel the contour that has not been closed, click Esc on the keyboard while holding the mouse button;

    • building contours with an isoline. Move the cursor around the selected area while holding the Shift button on the keyboard and the mouse button with which the tool was activated. Under the cursor, you will see an isoline. You can see an isoline only on the slices where a contour can be built. To build a contour with an isoline, release the mouse button with which the tool was activated.

  3. Go to the next slice and contour the selected area.

  4. After you have built the required contours, click the Start analysis  PIC button to go to the results of parameters assessment (see Section 8.4).



If there is a contour built with the current tool on the current slice, you cannot build a new contour here. You can only edit or delete the existing contour (see Section 8.3.4).

8.3.2 Evaluating the Left Ventricle Extension

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Functionality is available in a separate module which is activated in the Pro edition for an extra fee
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To evaluate the left ventricle extension, you need the SAX and the LAX merged series to be loaded to the Cardiac analysis tab (see Section 8.1).

To evaluate the left ventricle extension, proceed as follows:

  1. Open the study in the Cardiac function analysis tab (see Section 8.1).

  2. Activate the LV extension boundaries  PIC tool with the left, right, or middle mouse button. To continue work with the same tool, use the button with which the tool was activated. For details on tool management, see Section 1.14.

  3. In the window with the SAX merged series, choose the slice for the upper plane of the mitral valve and mark a point in the center of the mitral valve.

  4. Go to the slice corresponding to the left ventricular apex and mark a point in the center of the apex.

When you mouse over a point in the window with the SAX merged series, you see a pop-up tip with the type of the point, Mitral or Apex.

In the window with the LAX merged series, the left ventricle extension is marked with a line (Fig. 8.4).



In multiphase series, the left ventricle extension may be determined for each phase.

8.3.3 Contouring the Left Ventricle Endocardium Automatically

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Functionality is available in a separate module which is activated in the Pro edition for an extra fee
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To contour the left ventricle endocardium automatically, proceed as follows:

  1. Open the study in the Cardiac function analysis tab (see Section 8.1).

  2. Determine the left ventricle extension (see Section 8.3.2) for the End Diastole (ED) and End Systole (ES) phases.

  3. Click the Auto contouring  PIC button on the toolbar for cardiac function analysis.

Automatic contouring of the left ventricle endocardium is performed in the window with the SAX merged series for all the phases with the left ventricle extension and all the slices within the extension. The contour boundaries are shown on the slices in the window with the LAX merged series (Fig. 8.5).

PIC Attention! If a part of the atrium is present on the mitral valve slice, it may be captures while contouring.



To rebuild all the contours, press the arrow on the right-hand side of the Auto contouring  PIC button and select Rebuild contours.

To go to the results of parameters assessment, click the Start analysis  PIC button (see Section 8.4).

8.3.4 Actions with Contours

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Functionality is available in a separate module which is activated in the Pro edition for an extra fee
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The DICOM Viewer provides an opportunity to perform the following actions with contours: