Problems of handling monkeys in regression of white matter and cerebrospinal fluid

Hello, teacher: When I use the software to process my monkey data, the picture will be distorted when the signal regression of white matter and cerebrospinal fluid is carried out. I later found out that the mask of cerebrospinal fluid and white matter will be used by people when processing. I would like to ask if I need to change the mask of white matter and cerebrospinal fluid in spm for new treatment (change it to monkey's) Thank you very much.