Russian Engineers Create a New MRI Scanner for Overweight People

MOSCOW, Nov. 30, 2019 /PRNewswire/ -- The NUST MISIS Engineering Center for Industrial Technologies together with Research and production company Magneton have presented a new Russian MRI device capable of diagnosing patients weighing up to 250 kg. Up to now, this figure has been 120-150 kg. Another advantage of the Russian device for magnetic resonance imaging is its low price, and hence its availability for state medical clinics.

Magnetic resonance imaging is one of the most effective diagnostic methods in modern medicine. With the help of a magnetic resonance imaging scanner, cancer, multiple sclerosis, diseases of the musculoskeletal system and joints and others can be diagnosed in the early stages. The average cost of one analysis using MRI is, depending on the region, from 4 to 12 thousand rubles (60-200 US dollars).

The mass of the developed magnetic system of the new MRI device is almost 1.5 tons lower than that of foreign analogs with the same power (for comparison, the magnitude of the magnetic induction of 0.45 T was taken). At the same time, the air gap of the device, which determines its working area, is 7.5% more than that of existing analogs. By reducing the volume and weight of the magnetic system in th device, the space for research has increased. This will allow diagnosing patients weighing up to 250 kg.

With values of magnetic field non-uniformity which are identical to competitive apparatuses, and, as a result, with comparable image quality, the developed design of the magnetic MRI system can examine patient's bodies of 15% larger volume. This allows us to increase the area of the transmitted image by more than 12%, and also reduces the duration of the tomography process.

At the heart of the invention is an innovative technology for producing magnetic materials and permanent magnets with a reduced cost, developed by materials scientists from NUST MISIS. The use of a permanent, rather than a superconducting magnet, as in most modern MRI devices, can reduce the device operating costs by almost 1.5 million rubles (23 000 US dollars) a year.

"We have developed an innovative technology for the production of hard magnetic materials and permanent magnets with low cost, made from alloys of domestic rare-earth metals and their compounds, including those obtained from the processing of industrial waste from magnetic production," said the project manager, deputy director of the NUST MISIS Engineering Center for Industrial Technologies, Candidate of Political Sciences Evgeny Gorelikov.

Due to the use of man-made wastes of magnetic production and cheap rare-earth metal alloys in the production of raw materials for permanent magnets, the developers were able to reduce their cost by almost 1.5 times.

"The use of new soft magnetic materials allowed us to develop a magnetic wire for the magnetic system of the tomograph with a low level of loss while maintaining a high saturation magnetization (more than 2 T). This allowed to design and reduce the weight of the permanent magnets used in the construction of the magnetic system by almost 30%, which means to reduce both the weight and cost of the device," Gorelikov explains.

The cryogenic technique, liquid nitrogen, liquid helium and water for cooling (as in the case of MRI with superconducting magnets or electromagnets) will not be required to operate the new MRI unit. The power consumed by this unique tomograph will be less than 1 kW, so it can be powered even from renewable energy sources, such as solar panels and wind generators.

The cost of the "new generation" MRI analysis, according to developers, will be decreased by 50%. A prototype device was assembled at the plant of the Research and production company Magneton in Vladimir. According to the approximate calculations of the creators, it will be launched into mass production in 2-3 years.

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