Low-cost design makes ultrasound imaging affordable to the world
September 17, 2012
The handheld USB device — roughly the size of a computer mouse — works like existing ultrasound scanners, using pulses of high frequency sound to build up a picture of the unborn child on the computer screen.
However, unlike the technology used in most hospitals across the UK costing anywhere from £20,000-£100,000, the scanner created by Jeff Neasham and Research Associate Dave Graham at Newcastle University can be manufactured for as little as £30-40.
Tested by experts in the Regional Medical Physics Department at the Freeman Hospital, part of the Newcastle upon Tyne Hospitals NHS Foundation Trust, the scanner produces an output power that is 10–100 times lower than conventional hospital ultrasounds.
Accessible by medical teams in poorest nations
The engineers hope the device will be used to provide medical teams working in the world’s poorest nations with basic before-birth information that could save the lives of hundreds of thousands of women and children.
“Here in the UK we take these routine, but potentially lifesaving, tests for granted,” explains Mr Neasham, a sonar expert based in the University’s School of Electrical and Electronic Engineering.
“Imaging to obtain even the simplest information such as the child’s position in the womb or how it is developing is simply not available to women in many parts of the world.
“We hope the very low cost of this device and the fact that it can run on any standard computer made in the last 10 years means basic antenatal imaging could finally be made available to all women.”
Neasham said the original aim had been to make something portable and easy to use that would be affordable in developing countries as well as for some applications in the UK where ultrasound is still considered cost prohibitive.
“Cost was the key,” he explains. “The goal was to produce a device that could be produced for a cost similar to handheld Doppler devices (fetal heart monitors) used by most community midwives. Not an easy task when you consider a £20,000 scanner is generally classed as low cost.”
An expert in underwater sonar technology, Neasham has developed systems for imaging the seabed — looking for ship wrecks or specific geographical features — as well as underwater communications and tracking systems.
Drawing on his expertise in sonar signal processing, the design keeps components and hardware costs to an absolute minimum, and works by manually sweeping a transducer over the skin while a focused image is formed by the PC software.
Funded through an Engineering and Physical Sciences Research Council (EPSRC) Knowledge Transfer Account (KTA) and a Proof of Concept loan from NorthStar Ventures, the scanner requires nothing more than a computer with a USB port. Neasham said the beauty of this device was that it would complement — rather than replace — the high performance scanners available in hospitals.
“It was my own experience of becoming a father and going through the whole antenatal process that prompted me to start the project,” explains the father-of-two.
“I was sat with my wife looking at our child on the screen, we realised how privileged we were to have access to this kind of care and it was my wife who suggested that I could apply my knowledge from sonar research to try to make this more affordable.”
UN statistics estimate more than 250,000 women die annually from complications during pregnancy or childbirth, almost all of them — 99 per cent — in developing countries. Tragically, most of these deaths are avoidable and a lack of access to equipment is cited as one of the key factors.
Neasham adds: “There is obviously the potential to use it to go beyond obstetrics by using it to diagnose conditions such as gallstones, or other conditions that readily show up with ultrasound imaging. Even vets and farmers are interested in affordable imaging.”
UPDATE 9/17/2012: Jeff Neasham, Senior Lecturer, Newcastle University adds (in an email to KurzweilAI): ”The technology has progressed to the point where we have prototype units that are being evaluated for different clinical applications. Image quality is also increasing on almost a daily basis as we continue to improve transducer construction and signal processing, whilst maintaining the low manufacturing cost. We are now considering routes to manufacture and distribute the technology worldwide.” (Image added)