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Introduction to mrFindBorders
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4.6 Deforming Atlases
After the initially aligned atlas images have been created, the user can start the automatic de-
formation process by pressing the button labeled “2. Deform Atlases”. To improve the fit be-
tween measured phase image and corresponding atlas image, local deformations are applied to
the initially aligned atlas image. Depending on the options set by the user (explained later), the
registration process can be done on different resolutions, starting with a low resolution and
finishing with a high resolution. During the deformation process, different energy values are
displayed. The first value is the total energy, followed by the weighted components in percent.
The order of these components is the same as the order of the energy weights in the options
menu (wedge, deformation, points, ring), which is explained later in this chapter.
4.7 Selecting and Displaying Results
mrFindBorders can display two images at the same time. One of the two images is active, the
other one inactive. The inactive image is not updated until it is made active. This behavior is
wanted since it should be possible to compare different results. An image is made active by
touching the slider or by choosing from the list box above the image (Figure 23 left). An ac-
tive image has a white list box and a white slider background. The list box displays the type of
image that is currently shown, for example, a measured phase-wedge image, or an atlas phase-
wedge image. The user can choose between the following types of images:
1. Measured phase-wedge image (Figure 19 top left)
2. Measured coherence-wedge image (Figure 19 bottom left)
3. Measured phase-ring image (Figure 19 top right)
4. Measured coherence-ring image (Figure 19 bottom middle)
5. Visual field sign map based on the measured data (Figure 19 bottom right)
6. Phase-wedge atlas image (Figure 21 top right)
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