I have a volume whose density values are -127 thru 127.  Zero is a valid density & approximately the peak of the Guassian distribution.


I would like to use the command mask.

It sets the unmasked density values to zero.

How can I set the unmasked density values to -128 using the mask command?

Will I need to hack the code?


Matthew Dougherty
National Center for Macromolecular Imaging
Baylor College of Medicine
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