generate a mask ROI with the same dimensions as the input dataset, and all voxel values set to one in the regions specified
| -coord axis coord | extract data only at the coordinates specified. 
| axis | the axis of interest |  | coord | the coordinates of interest |  | 
| -datatype spec | specify output image data type. 
| spec | the data type specifier. |  | 
| -info | display information messages. | 
| -quiet | do not display information messages or progress status. | 
| -debug | display debugging messages. | 
| -help | display this information page and exit. | 
| -version | display version information and exit. |