MRI scans require picking up extremely weak radio signals from the body. These signals are easily distorted by strong magnetic fields, interference, and long cable runs inside the MRI machine. Current amplifiers that boost these signals are often bulky, work only for narrow frequency ranges, and need different versions for different MRI systems. This limits flexibility and takes up precious space inside the scanner.
Core Features
This invention is a tiny, integrated RF preamplifier built using transconductance amplifier technology with a “folded cascode” design. It can boost MRI signals across a very wide frequency range (100 kHz to 600+ MHz) without being customized for each frequency. It’s also low-noise (under 1 dB), uses little power, and can fit close to the signal source inside the coil.
What’s New
Unlike conventional designs that use bulky discrete parts or integrated circuits prone to interference, this design combines the best of both worlds:
- Integrated CMOS technology for miniaturization and efficiency
- Differential input design to reject magnetic interference
- Folded cascode structure to achieve high bandwidth and prevent distortion
- Adjustable gain via control signals without physically changing the hardware.
Benefits
- Much smaller size allows more antennas in the same space, enabling faster scans or higher-resolution images.
- Works across multiple MRI frequencies, meaning one amplifier design can fit many machine types.
- Better signal-to-noise ratio leads to clearer images.
- Easier to upgrade existing MRI machines without major hardware changes.
Broader Impact
This could improve MRI performance in hospitals, research labs, and portable scanners. Smaller, more efficient electronics also support sustainability by reducing component count, extending equipment life, and enabling retrofits instead of full replacements. Overall, it makes MRI imaging faster, more flexible, and more precise—benefiting both patients and industry.