MRI & Medical Equipment Applications
Fiber optic sensors for high magnetic field environments where traditional sensors cannot operate.
GAP SENSORS FOR
MRI APPLICATIONS
The 11.7T Whole Body MRI – The Iseult project under
development at CEA-Saclay, in collaboraƟ on with Siemens Healthcare and Alstom Magnets and Superconductors, is scheduled for commissioning in 2012.
Philtec’s fi ber opƟ c sensors are playing a vital role in a
prototype which is very important for assessing the design. Displacements of many items inside the cryogenic
system are being measured successfully to sub-micron
level resoluƟ on
Liquid helium @ 1.8K
• High MagneƟ c Field 11.7T
• Pressure 15 mbar
Gaseous helium @ 6 K to 300 K
• No MagneƟ c Field
• Ambient Pressure
Philtec is a world-wide leading supplier of fi ber opƟ c displacement sensor systems for
operaƟ on in very extreme environments, including:
HIGH MAGNETIC FIELD
HIGH VOLTAGE
HIGH PRESSURE
HIGH /LOW TEMPRATURE
VACUME
Fiber Optics for High Magnetic Fields
The Problem
Fiberoptic probes and cables may be exposed to high magnetic fields.
The Solution
By jacketing the fiberoptic cable in non-metallic materials, and by constructing the sensor tip
from non-metallic or non-magnetic materials, Philtec sensors can be configured to perform
measurements in very high magnetic fields. Successful applications to several Tesla have
been reported.
| Option | Cable Jackets | Max Temp | Features |
|---|---|---|---|
| C2 | Silicone Coated Fiberglass | 200°C | Maximum flexibility, no crush strength |
| C3 | Silicone over PTFE Wrap | 200°C | Light crush resistance, short lengths <2 m max. |
| C4 | Corrugated Plastic | 85°C | Flexible, Semi-crush proof |
| C6 | PVC over Nylon | 105°C | Light crush resistance, long lengths OK |
| C7 | PTFE | 260°C | Zero outgassing, poor flexibility |
| C8 | PVC Only | 105°C | Good flexibility, no crush strength, long lengths OK |
| C11 | Polyolefin Shrink Tubing | 135°C | Poor Flexibility, Good Vapor Barrier |
| C13 | Furcation tubing | 85°C | PVC/Kevlar/PTFE High Tensile Strength |
| Option | Material/Tips | Max Temp | Features |
|---|---|---|---|
| T3 | Peek Plastic | 250°C | Non-metallic |
| T3 | Torlon | 260°C | Non-metallic |
| T11 | Aluminum | 260°C | Non-magnetic |
| T11 | Brass | 800°C | Non-magnetic |
