Transverse Axial Tomographic Unit, Italy, 1957

1957 in Geneva and Turin

Buy this image as a print 

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

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Transverse Axial Tomographic Unit by Zuder of Turin, 1957

This X-ray unit can locate and then show in 3-D the size and site of a tumour prior to radiotherapy. It was used for cancer research studies at the Holt Radium Institute at the Christie Hospital in Manchester. Transverse axial tomography was a complex process which was restricted to specialist departments such as the Holt Institute. The Institute is still at the forefront of medical research.

Tomography originated in the 1930s. The technique for obtaining radiographs of horizontal sections of the thorax or trunk was patented in 1937 in the UK by William Watson. Italian radiologist Alessandro Vallebona (1899-1987) described a similar technique he called ‘X-ray transverse axial stratigraphy’, also in the 1930s. Vallebona had an X-ray source and a film running in opposite directions around a patient. Only those lying in the plane of rotation were sharply focused. They represented a ‘slice’ of the body.

This machine was made by Zuder of Turin. Tomography was much used as a diagnostic tool until the late 1970s when it was replaced by the Computed Tomography (CT) scanner developed by Godfrey Hounsfield at EMI.


Object Number:
metal and plastic
transverse axial tomography scanner
Christie Hospital and Holt Radium Instit

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.