Radiation dose calculator

1955-1975 in Beaminster
Abbot Brown

Buy this image as a print 

License this image for commercial use at Science and Society Picture Library

Blackwell Radiation Treatment Time Calculator.
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Blackwell Radiation Treatment Time Calculator for use with Theratron model B cobalt 60 radiotherapy machine, used to assess appropriate length of patient exposure to radiation during cancer therapy treatment, made by Abbot Brown, Beaminster, United Kingdom, 1955-75.

Radiation therapy or radiotherapy is used to kill cancerous cells in the body and prevent them spreading. However, too much radiation is dangerous as it can affect surrounding healthy cells. This calculator would have been used to determine exactly how long the treatment should last.

Carried out in specialised hospital units, radiotherapy treatments are spread out over days and weeks to allow healthy cells to recover. The calculator was made by Abbot Brown, a printer based in Dorset, England.

On display

Science Museum: Medicine: The Wellcome Galleries

If you are visiting to see this object, please contact us in advance to make sure that it will be on display.


Object Number:
1979-598 Pt37
metal (unknown) and plastic (unidentified)
radiation dose calculator
  • furnishing and equipment
  • tools & equipment
  • calculator
  • ready reckoner
Mount Vernon Hospital

Cite this page


We encourage the use and reuse of our collection data.

Data in the title, made, maker and details fields are released under Creative Commons Zero

Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence

Using our data


Download catalogue entry as json

View manifest in IIIF viewer

Add to Animal Crossing Art Generator

Download manifest IIIF

Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.