OSI² just made a 3D-printable MRI core producing real images

Signals Inbox·July 27, 2026·MedTech

OSI² has built an open-source MRI system that can produce real images of human heads and limbs with hardware costing roughly €25,000 to €60,000. It is far weaker than a hospital MRI, but that is the point: MRI could move from million-dollar vendor machines toward equipment that universities and hospitals can build, repair, and improve themselves.

Q1What actually happened?

The official OSI² project has published the hardware and software behind a low-field MRI scanner called OSI² ONE. Its parts can be produced with tools such as a CNC machine and a 3D printer, and working systems have already produced real images of human heads and limbs.

Q2Is the whole MRI really 3D-printed?

No. That description is too simple. The supporting structures and some custom parts can be printed, but the machine still needs hundreds of permanent magnets, gradient coils, radio equipment, amplifiers, electronics, and software. The real breakthrough is that the entire design is open and can be assembled without a traditional MRI manufacturer.

Q3How much cheaper is it?

OSI² currently estimates material costs at roughly €25,000 to €60,000, depending on the configuration. Conventional hospital scanners often cost well above $1 million before installation, shielding, cooling, servicing, and building work. This is not a small discount. It cuts the basic hardware cost by roughly two orders of magnitude.

Q4What is the catch?

The magnetic field is only around 50 millitesla. A normal hospital MRI usually operates at 1.5 or 3 tesla, making it roughly 30 to 60 times stronger. Lower field strength means weaker signals, more noise, less detail, and harder image reconstruction. OSI² is making MRI cheaper by accepting a real performance trade-off.

Q5Are the images actually useful?

They are real, not simulated. Earlier versions produced human brain images in about six minutes, and newer testing has reported resolution around two millimeters. That is impressive for such cheap hardware, but producing a recognizable brain image is not the same as reliably finding tumors, strokes, or tiny lesions. Clinical validation is still the big test.

Q6Why does open source matter here?

Medical scanners are normally closed systems. Hospitals depend on the manufacturer for parts, software, repairs, and upgrades. OSI² publishes the designs so universities and local engineering teams can rebuild, repair, and adapt the machine themselves. Systems have already been constructed in places including Germany, the Netherlands, Uganda, and Paraguay.

Q7So could this replace hospital MRI?

Not soon. High-field scanners will remain much better for detailed and difficult diagnoses. The nearer opportunity is putting simpler head and limb imaging in clinics, research centers, mobile facilities, and countries where conventional MRI is too expensive or difficult to maintain. The real disruption is not better MRI. It is MRI in places that currently have none.