The aims of this project were to identify the national range of breast boost radiotherapy doses and variations in treatment practice; determine the factors that potentially cause variations; and examine whether differences between regions are based on clinical evidence or access to technical and financial resources by surveying Therapeutic Radiographers across the United Kingdom to determine current radiotherapy boost practice.

A cross-sectional study design was selected. An electronic questionnaire using the website Survey Monkey® tool was utilised to collect categorical data from practicing Therapeutic Radiographers within the United Kingdom.

Participants were invited to participate from radiotherapy departments across the four countries of the United Kingdom (England, Scotland, Wales and Northern Ireland). There are 52 radiotherapy departments across 12 regions of the United Kingdom.

In total, 34 Therapeutic Radiographers participated. Their responses were grouped according to their region of practice. Results indicated that there are ten different dose schedules offered to patients nationally for the treatment of breast boost, with 77% of respondents using electrons to deliver boost radiotherapy.

There is no general consensus among Therapeutic Radiographers about whether factors such as age, tumour size, tumour grade or the presence of negative or positive margins, influence the therapeutic doses prescribed for different patients. This may be attributed to the absence of clinical research evidence to support evidence-based practice.