Add index_mask_file input to ImageStats

Allows fslstats calls with the -K option

Author: pndni-builder

.zenodo.json

@@ -695,6 +695,11 @@
       "affiliation": "MIT, HMS",
       "name": "Ghosh, Satrajit",
       "orcid": "0000-0002-5312-6729"
+    },
+    {
+      "affiliation": "Holland Bloorview Kids Rehabilitation Hospital",
+      "name": "Tilley II, Steven",
+      "orcid": "0000-0003-4853-5082"
     }
   ],
   "keywords": [

nipype/interfaces/fsl/utils.py

@@ -725,18 +725,20 @@ class ImageStatsInputSpec(FSLCommandInputSpec):
         exists=True,
         argstr="%s",
         mandatory=True,
-        position=2,
+        position=3,
         desc='input file to generate stats of')
     op_string = traits.Str(
         argstr="%s",
         mandatory=True,
-        position=3,
+        position=4,
         desc=("string defining the operation, options are "
               "applied in order, e.g. -M -l 10 -M will "
               "report the non-zero mean, apply a threshold "
               "and then report the new nonzero mean"))
     mask_file = File(
         exists=True, argstr="", desc='mask file used for option -k %s')
+    index_mask_file = File(
+        exists=True, argstr="-K %s", position=2)
 
 
 class ImageStatsOutputSpec(TraitedSpec):