ImgRng

The imgRng GUI provides several functions.  A choice gui
first allows the user to specify the data type, func or
anat, and the plane index.  When the run button is pressed,
a popup window with the specified image is displayed.
For the case of the 4D func data, a temporal average
is used.  Note that if the image looks like nothing but
noise it may be that the endian was not specified correctly
during the load.

An initial guess at a display range (Min/Max) and the
threshold are calculated.  These values can be changed and
the effect viewed after the Update button is pressed.
There are three menu choices to view the threshold
result; None, Less-than, or greater-than-or-equal.
Note that these choices are for display purposes only.
The threshold value is used to generate a processing mask
with a greater-than-or-equal threshold logic regardless
of the display choice.

On the right hand side of the imgRng popup window are
P-value parameters.  Given the desired Global P value,
the minimum activation cluster size and the number of
tapers for the F-test, the adjusted P value is calculated
along with the corresponding cross correlation level and
F-Test significance level.  These values are calculated
using both the Polyomino and Bonferroni methods.

imgRngChoice GUI Tips
 imgKind --> Data kind: 4D functional or 3D anatomic.
 plane --> Index of image planes.