Biggest human imaging study scans 100,000th UK volunteer
The 100,000th volunteer to be scanned was Steve, who recently retired from a job in sales and now helps out at a charity run by his daughter.The BBC watched as he entered a full-body MRI scanner in an industrial park outside Reading, and detailed images of brain cells, blood vessels, bones and joints appeared on the screens."My mum was diagnosed with early-stage dementia a few years ago and has not been well," he says."So with that in mind I want to give more back to research so the next generation can learn from people like me."
The giant medical imaging project has been running for 13 hours a day, seven-days-a-week across four sites in England.Participants are given a five-hour appointment to be scanned using five different types of MRI, X-ray and ultrasound machines.The data gathered is anonymised and volunteers like Steve receive no individual feedback unless the radiographers happen to spot a potentially serious health problem.The project does not allow personal data, such as a volunteer's surname or the precise area where they live, to be published.
What is UK Biobank?
Launched in 2003, UK Biobank is one of the largest collections of biological samples and health data in the world.In total, half a million people – all middle-aged volunteers – have been asked to complete physical tests, answer regular health and lifestyle questions, and provide DNA and other biological samples.Their blood, urine and saliva are frozen in liquid nitrogen and stored at temperatures of -80C (-112F) in huge refrigerators in Stockport, Greater Manchester.The imaging part of the project began in 2014, and involves taking detailed scans of 100,000 of those same participants.All of that group will be invited back to repeat the process every few years to see how their bodies and organs change as they grow older.By combining those scans with the other data collected by UK Biobank, scientists can test whether early changes to the make-up of the brain or body then lead to diseases or other health problems in later life.
The whole UK Biobank project, which is non-profit making, was set up by the Medical Research Council and the Wellcome Trust charity, along with the Department of Health and the Scottish government.Two decades later it is now reaching maturity.Over 30 petabytes, or 30,000 terabytes, of anonymised health data is already available to researchers working for universities, charities, governments and the private sector.Scientists in the UK and the rest of the world can apply for access and most are charged between £3,000 and £9,000 to help cover running costs.
Louise Thomas, professor of metabolic imaging at the University of Westminster, says it is "completely transforming" how she and other researchers do their jobs."We thought it was a crazy idea, there was absolutely no way anybody could scan this number of people," she says. "To analyse these images manually would have taken us thousands of years but now... we can extract all the information automatically, so we can measure everything in the body in a matter of minutes." Researchers are increasingly using artificial intelligence (AI) to process the huge amounts of data generated by the project.Almost 1,700 peer-reviewed papers have been written using all types of Biobank data since work started in 2003, with dozens more now published every week.
The scans and images taken so far have already been used to show that:The early onset of 38 common diseases can be predicted by combining MRI scans with other health data and an artificial intelligence (AI) modelConsumption of just small amounts of alcohol each day can be linked to an increased risk of memory loss and dementiaA detailed MRI scan can replace surgery to diagnose and monitor a common form of liver diseaseChanges to the structure of the heart may lead to an increased risk of psychiatric disorders including depressionUK Biobank is one of the 10 largest stores of personal health data in the world alongside similar initiatives in Germany, China and the United States, although those projects don't all make their data available to scientists globally in the same way.The imaging element of the project is also funded by a number of other organisations including the British Heart Foundation, Calico, a subsidiary of Alphabet which also owns Google, and the Chan Zuckerberg Initiative, established by Facebook founder Mark Zuckerberg and his wife Priscilla Chan.
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