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diff --git a/tools/clitkDicomRTStruct2Image.ggo b/tools/clitkDicomRTStruct2Image.ggo
index 33fb3b75c4931a70c1625c4aaa1e984f70381575..8a09da1c5b4baa33a2e915d3eb303ae5a48c4e3c 100644 (file)
--- a/tools/clitkDicomRTStruct2Image.ggo
+++ b/tools/clitkDicomRTStruct2Image.ggo
@@ -7,7 +7,7 @@ option "verbose"         v "Verbose"                         flag       off
 option "verboseFile"     - "Verbose file content"            flag      off
 option "input"          i "Input Dicom file"                string     yes
 option "image"          j "Used to read image info (spacing, origin)"    string        yes
-option "output"                 o "Output image filename"       string yes
+option "output"                 o "Output image base filename (roi number and extension will be append)"        string yes
 
 defgroup "ROIoption" groupdesc="an option of this group is required" 
 groupoption "roi"     r "ROI to binarize (if -1 = all roi)"            int    no default="-1" group="ROIoption"