Whanganui District Health Board radiographers will strike on Wednesday.
The action is part of a nationwide strike of nearly 1100 district health board radiographers around the country and follows nine months of failed negotiations between the radiographer's union, Apex, and DHBs.
In Whanganui the strikes will run from 7am on Wednesday to 7am on Thursday.
WDHB said people with appointments which require medical imaging services on this date had been notified and appointments would be rescheduled.
The strike does not affect ultrasound services.