Protests were staged outside Sheffield hospitals as staff carrying out X-rays and radiotherapy went out on a four hour strike.
It was the first time radiographers had taken such action in 32 years and followed walk outs by nurses and midwives last week as part of a wider dispute over NHS pay.
Some patients who had pre-booked appointments and procedures at the Royal Hallamshire and Weston Park hospitals were affected by the action, which ran from 9am until 1pm.
Members of the Society of Radiographers are also planning to work to rule for the rest of the week, but will still provide emergency and urgent care.
The Department of Health said it was ‘disappointed’ by the radiographers’ strike and said a larger pay rise would risk front line jobs.
The strike was called across the UK due to an ‘ongoing pay freeze’ and because the Government ‘rejected a recommended one per cent pay rise’ for staff, the society said.
An independent pay review board proposed the pay increase for all NHS staff but ministers decided to exclude staff who receive incremental rises. These are given to about half of staff and are worth three per cent a year.