Online Help:

Usage: /vol/vssp/local/trees/amma-4/linux/bin/doRegionVector [options] 
   -optload () [] Load options from a file.  
   -optsave () [] Save options to a file.  
   -i () [(null)] input image 
   -vl () [(null)] input dataset 
   -b (0) [0] border 
   -median (median) [median] output median 
   -mean (mean) [mean] output mean 
   -help (TRUE) [FALSE] Print usage information. 

Dependancies:
   -i is compulsory.
   -vl is compulsory.