04/06/2026
Engineers and clinical scientists at The Clatterbridge Cancer Centre (CCC) have used their ingenuity to develop a new dose monitoring system for the UK’s national eye proton therapy service.
CCC was the first hospital in the world to introduce proton beam therapy for cancer back in 1989. Eye proton therapy is so highly-specialist that there are just a handful of services worldwide and there are no commercial manufacturers for low-energy proton machines. Any new kit has to be designed and developed in-house by our team.
Dose monitoring is a crucial element of the system. Ion chambers within the treatment beamline measure the proton radiation being delivered to the patient. Specialist devices then calculate the dose being delivered thousands of times per second and shut the beam off when the correct dose has been delivered, all coordinated via an industrial computer.
The CCC team worked with Pyramid Technical Consultants, with funding from NHS England, to design and build the bespoke system. Experts from the National Physical Laboratory independently validated its dose accuracy and distribution.
Lydia Harrison, from Clacton-on-Sea in Essex, is one of the first patients to be treated since the new system went live. She said: "I was offered the choice between eye proton therapy or joining a clinical trial of injections for several months. I wanted proton therapy as it was going to be quicker and easier – once a day for four days. The treatment doesn’t take long and, although I was a bit nervous beforehand, you just see a quick flash of light and then it’s done."
Peter Corlett, Lead Engineer at The Clatterbridge Cancer Centre, said: "Building the dose monitoring system has been a huge team effort from a wide range of different roles within CCC and with our commercial partner, Pyramid Technical Consultants, who have supported us superbly. It is incredibly rewarding to know that the work we have done contributes towards maintaining the eye proton therapy service for many years to come, ensuring our patients receive the highest quality treatment possible."
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