DEXA scanning involves ionising radiation but it is a very low radiation dose, approximately 4 uSv for a full body scan using our unit, the Hologic Discovery Wi. The table below compares radiation dose values (in effective dose) for some context. An extract from a published journal article explaining the radiation risks of DEXA total body scanning is available on our website and in our reception for further reading. This article concludes there is no scientific evidence of risk at doses below about 50 uSv in a short time.
Effective dose values for Hologic Fanbeam DXA and other imaging procedures & background radiation*
Procedure Client Dose (uSv)
Body CT scan 5000 - 15000
Head CT scan 2000 4000
Lumbar Spine X-ray 600 - 1700
Dental bitewing 60
7 hr aeroplane flight 50
Chest X-ray 40 - 50
DXA bone mineral assessment 11
Natural background radiation (daily) 6-8
DXA whole body composition 1-4
To comply with the requirements of informed consent, please sign below.
I Agree I have read and understood the radiation information above and in signing the form below I declare have not been already been scanned more than five (5) times on any DEXA unit in the past 12 months.
February 19, 2020