The Outline Window

This window shows the 3D positions and orientations of all the objects Stradx knows about (B-scans, reslice plane, manifold surface, segmentation contours, landmarks, patient). When you open it for the first time, you will see an arch-shaped outline of the current B-scan. The probe surface (top of the B-scan image) is at the top of the arch. The left and right of the B-scan, as it appears in the `Review' window, are labelled `L' and `R'.

The Outline Window

The outlines may be displayed in any order using the slider at the base of the window. If the mouse button is held down in the region to one side of the slider, then the slider will move continuously in that direction, and the B-scans will be displayed in sequence. To see all the outlines immediately, without having to sweep through the entire sequence, click the `All' button. To show only the outline of the current scan, click the `Clear' button.

The left mouse button rotates the outlines (about their centre of gravity) both up-down and left-right. The middle mouse button rotates them about an axis perpendicular to the window. The right mouse button may be used to select a B-scan by clicking on its outline. This is particularly useful because the sliders in all the windows are linked together, so you can select a scan in the `Outline' window and then view the corresponding B-scan in the `Review' window. The current B-scan is shown as a red outline, all the others are shown in white.

The Outline Window

The segmentation contours, if defined, show up in the `Outline' window as coloured curves (according to the colours defined in the object selection panel, except those in the current scan, which are always drawn in red). Clicking on a contour with the right mouse button works just like clicking on an outline: it selects that scan and updates all the other windows. Remember to click the `All' button if you want to see all the segmentation contours immediately. The window also displays the volume of the segmented region: click the `Update' button to recalculate the volume when necessary.

Display of the landmarks are also controlled by the 'Seg' toggle button. Each landmark displays as a light blue blob, together with the name of each landmark, positioned in the correct location in 3D space.

The current B-scan, reslice plane (if defined) and manifold surface (if defined) are also displayed. They usually show up as dark red (B-scan) or green (reslice and manifold) shaded surfaces. However, if you toggle the `Texture' button, the B-scan, reslice and manifold images are mapped onto their shapes in the `Outline' window. Note that this will not work for the reslice and manifold unless you have already calculated the relevant image. So, if you want to see the reslice image in the `Outline' window, you need to have the `Reslice' window open, displaying the required image. Likewise for the `Manifold' window. You can adjust the transparency of these images using the lower `Alpha' slider, allowing you to see through the reslice to a B-scan behind, for example. High alpha gives opaque images, low alpha gives transparent images. Here's an example showing the B-scan, reslice and manifold images. Note that the manifold surface is flat in this case, allowing the simultaneous display of three planes in the 3D data set.

The Outline Window

The `Outline' window also includes facilities to reposition the reslice plane. If the shift key is held down, the first two mouse buttons can be used to manipulate the reslice plane without moving the B-scans. The third mouse button (with the shift key) translates the reslice plane perpendicular to the current viewing direction. While you are dragging, the images in the `Reslice' and `Manifold' windows may update in real time, depending on the setting of the `CPU & graphics performance' slider in the `Edit setup' panel.

If your recorded data includes a valid body registration, you can also view the patient's body by toggling the `Body' button. The upper `Alpha' control manipulates the transparency of the body: high alpha gives a fully opaque body, whereas low alpha gives a transparent body through which you can see the B-scans, segmentation contours, reslice and manifold surfaces (if defined). The resolution and speed of the body rendering can be controlled using the `CPU & graphics performance' slider in the `Edit setup' panel.

If you think the display is getting cluttered you can toggle on and off the display of the outlines, current B-scan, segmentation contours, slice plane, and manifold using the five toggle buttons towards the left of the control panel. Remember, though, that if you switch off display of the slice plane, you will not be able to manipulate it using the mouse buttons with the shift key.

Note that if image registration has been applied, this window will show the corrected B-scan positions, not the original positions.