Global EMC solutions provider EMIS announces the availability of the MF420-2CF-M MRI Filter, a specialised electrical filter for use in Magnetic Resonance Imaging rooms to block unwanted electromagnetic interference (EMI) and radio-frequency interference (RFI) from entering or leaving the MRI environment.
Designing or selecting an EMI filter for high-field MRI systems is very different from general electronics filtering as MRI environments are extremely sensitive to RF noise and require shielded-room integrity as well ultra-high attenuation across wide frequency bands.
EMI filters are critical in MRI High-field systems which operate with very low-level RF signals in an environment featuring strong static magnetic fields. External EMI contamination can degrade signal-to-noise ratio, create artifacts in images and cause regulatory non-compliance. Even cables entering the MRI room can act as antennas and leak noise into the shielded enclosure.
MRI EMC filters provide strong suppression of unwanted signals over a wide frequency range up to 10GHz, preventing external noise from affecting MRI signals and ensuring high-quality diagnostic images. These filters are typically installed at the point where power lines or signal cables enter an MRI shielded room, for example:
- Power line filters – Main AC supply (single/three-phase), Gradient amplifiers, RF amplifiers.
- Signal line filters – Ethernet / data lines, patient monitoring systems, fire alarms, intercoms, sensors.
MRI filters are specially designed to meet the strict performance requirements of equipment manufacturers and ensure compatibility with high-field MRI systems and sensitive imaging processes. The filter components are enclosed in a shielded and sealed metallic housing that protects against dust, moisture, and corrosion ensuring long-lasting performance.
Key features include:
- Connection via threaded conduit and flexible wire leads, allowing fast and secure installation in shielded MRI rooms.
- Designed with an internal discharge bleeder resistor that safely discharges stored electrical energy when power is turned off, reducing the risk of electric shock during maintenance.
- Designed with low leakage current, ensuring patient safety by minimising unintended current flow.
EMIS aims to offer an end-to-end solution to meet industry’s ongoing EMI Challenges. With a robust global supply footprint across eight industry segments, EMIS is continuously investing in technology and skills to deliver its promise of efficiency with seamless customer support.
EMI Solutions has been designing and manufacturing EMI filters for more than 40 years and is a global source for efficient EMI and EMC solutions across all industries, applications and the frequency spectrum. Products available include EMI/EMC Components, Feedthrough Components, Power Quality, Military Grade Filters and Surge Protection.
Customers are supported by a very experienced consulting team, a fully equipped Pre-Compliance Lab and a huge safety certified standard product offering of over 2500 part-numbers produced in their own very efficient facility.
About EMI Solutions (EMIS):
Has been designing and manufacturing EMI filters for more than 40 years and is a global source for efficient EMI and EMC solutions across all industries, applications and the frequency spectrum. With a robust global supply footprint across eight industry segments, EMIS is continuously investing in technology and skills to deliver its promise of efficiency with seamless customer support.
