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Introduction to mrFindBorders
56
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Various regions of interest (ROIs4) can be loaded, saved, exported, and imported.
There are visual area ROIs, which mark the visual areas V1, V2d, V2v, V3d, and V3v,
as well as other ROIs, which are explained next.
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Iso-angle ROIs are lines from the fovea to the periphery. The angle in the visual field
is expected to be constant along iso-angle lines. Iso-eccentricity ROIs are lines with a
constant radius from the fovea in the visual field. ROIs are saved in a format that
mrLoadRet can read. If mrLoadRet is running, it is possible to export ROIs directly to
mrLoadRet without saving the ROIs to disk.
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Also, mrLoadRet loads a file called corAnal.mat with flat data. Such a file can be cre-
ated in mrFindBorders. It stores measured flat data (phase and coherence) for wedge
and ring stimuli. In addition, it stores the deformed atlases of the current data set for
wedge and ring stimuli. mrFindBorders calls the function addType to ensure that
mrLoadRet can read the created corAnal.mat file.
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After mrFindBorders has identified visual areas (and has produced visual-area ROIs),
it is possible to export these visual-area ROIs to mrLoadRet. In mrLoadRet, an experi-
enced human expert can correct the result. Then, the corrected visual-area ROIs can be
imported as gold-standard visual-area ROIs into mrFindBorders from mrLoadRet.
Gold standard reference ROIs can be loaded, saved, and imported from mrLoadRet.
4.8.2 Edit Menu
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The Edit menu (Figure 28) allows the user to specify and reset options. The default op-
tions are stored in the file “vSetUdDefault.m” and can be changed there. The options
menu is explained later in this chapter.
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With the function “Copy Current Data Set to Initial Data Set”, it is possible to save
control point displacement values5 of any data set by first copying that data set to the
4
Please refer to the glossary for more information.
5
Please refer to the glossary.
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