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Medical Physics and Biomedical Engineering

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World Cancer Day 2022

4 February 2022

This World Cancer Day we're championing advances in cancer research and treatment made by our staff, students and partners.

Profile pictures of staff who worked on x-ray project

New x-ray imaging scanner will assist surgeons while performing breast cancer tumour removal surgery

Through the £4.8m Prosperity Partnership, Ïã¸ÛÁùºÏ²ÊÖÐÌØÍø and Nikon joined forces to develop new techniques to gain more information from X-rays, improve disease detection and industrial testing.

One of the advances brought about by this partnership was the co-developmentÌýby Ïã¸ÛÁùºÏ²ÊÖÐÌØÍø Medical Physics and Biomedical Engineering researchers and Nikon of a new x-ray imaging scanner that will assist surgeons while performing breast cancer tumour removal surgery.

This new approach to x-ray imaging allows surgeons to assess extracted tissue intraoperatively or during the initial surgery, giving 2.5 times better detection of diseased tissue in the margins than with standard imaging. ResearchersÌýused X-Ray Phase Contrast Imaging (XPCI), developing a scanner which provides surgeons with a full 3D image of the extracted tissue lump, known as a wide local excision (WLE).

Currently, the WLE is assessed through histopathology – the microscopic examination of tissue – with results only available after several days. If affected margins are detected, often a second operation is required.

XPCI imaging provides soft tissue sensitivity which is superior to conventional x-ray. Whereas standard imaging picks up the x-ray beam’s change in intensity as it travels through tissue, phase contrast imaging measures the changes in speed with which x-ray travels through different tissues, which has been proven to enhance soft tissue contrast, including of breast tumours. Find our more here.

Header image:ÌýThe Ïã¸ÛÁùºÏ²ÊÖÐÌØÍø and Nikon teams whoÌýhave collaborated on this project

Histopathology image of a breast cancer tumour
With the "gold standard" histopathology image on the right shows how closely these resemble each other,Ìýto the extent that x-ray images obtained in this way could be used to perform "virtual" histology.ÌýYellow arrows 1 and 2 indicate an area where the tumour reaches the edge of the specimen and tumour-induced inflammation, respectively, both confirmed by histopathology.ÌýThe red arrow shows that the method can resolve density variations inside the tumour

Pre-commercial prototype resulting from the Nikon-Ïã¸ÛÁùºÏ²ÊÖÐÌØÍø collaboration that was used in the study.
Pre-commercial prototype resulting from the Nikon-Ïã¸ÛÁùºÏ²ÊÖÐÌØÍø collaboration that was used in the study.Ìý

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University College London HospitalÌýtreatsÌýits first patients using Proton Beam Therapy

The Proton Beam Therapy Gantry at Ïã¸ÛÁùºÏ²ÊÖÐÌØÍøH
image demonstrating how Proton Beam Therapt works
treatment plans (craniospinal and ewing sarcoma) highlighting an x-ray vs proton comparison
Treatment plans (craniospinal and ewing sarcoma) highlighting an x-ray vs proton comparison

In December 2021, University College London HospitalÌýtreated its first patients using Proton Beam Therapy (PBT).ÌýOne of only twoÌýNHSÌýproton beam centres in the UK, the new centre at Ïã¸ÛÁùºÏ²ÊÖÐÌØÍøH brings together some of the world’s leading specialists in complex cancers and will drive forward research into what remains a relatively new treatment.

The advantage of proton beam therapy over conventional radiotherapy is that the bulk of the energy is delivered directly to the tumour with no exit dose. This limits the impact on the surrounding healthy tissue, leading to fewer side-effects and reduced long term consequences, including the risk of a secondary malignancy. Patients treated with PBT range from very young children to adults who have hard to treat cancers. These may be tumours in the brain, on the spine, or near the reproductive organs, where it is particularly important to protect the surrounding tissue. Around a third of the patients will be children and teenagers.Ìý

Ïã¸ÛÁùºÏ²ÊÖÐÌØÍø Medical Physics and Biomedical Engineering researchers and Ìýand their teamÌýare working in partnership with Ïã¸ÛÁùºÏ²ÊÖÐÌØÍøH to advance the future of cancer therapy through their research on proton beam therapyÌýand in the development of clinical trials.Ìý

Find out more on and about theÌý.

Ïã¸ÛÁùºÏ²ÊÖÐÌØÍø Medical Physics and Biomedical Engineering, in partnership with Ïã¸ÛÁùºÏ²ÊÖÐÌØÍøH and IPEM will be holding a public lecture on Proton Therapy in Spring 2022, details to follow.Ìý

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Proton Beam Therapy Research presented at STEM for Britain 2022

profile picture of Adam Szmul
Staying with Proton Beam Therapy; we’re delighted that we have a second member of the MPBE community accepted to take part in . Research Fellow, will represent Ïã¸ÛÁùºÏ²ÊÖÐÌØÍø and the Department by presenting his research on Artificial Intelligence to Improve Proton Beam Therapy Delivery in Children with Cancer on 7th March to policymakers at the Houses of Parliament.

Best of luck, Adam! We can’t wait to see your final poster and hear all about the event!