M.R.I.

RFI Industries has been manufacturing shielded enclosures since 1973 and is a major supplier of EMI shielding and EMI/EMC engineering expertise. In 1985, with the introduction of Nuclear Magnetic Resonance Imaging, RFI designed and installed its first all copper insitu shield for an MRI system. To improve versatility for change and relocation, a series of modular pre-fabricated shielded enclosures was introduced to suit M.R.I. installations in hospitals.

Hospitals

The in-situ shielding is most applicable to hospital installations, large laboratory and computer installations. Our engineers are willing to discuss and design these types of enclosures in detail and can assist your architects in incorporating these enclosures integrally into building design.

Shielded rooms can be designed and installed in hospitals for high sensitivity areas where E.E.G., E.C.G. and E.M.G. are to be carried out. Special shielded rooms are available in non-ferrous material for M.R.I. installations. Our staff have completed installations in hospitals internationally and throughout Australia and New Zealand. The design and installation of all R.F. enclosures, especially of very large sizes, requires specialised knowledge and experience in electronics architecture and mechanical engineering. Our staff has many years of experience in these fields and we can provide the customer with an enclosure which guarantees full R.F. integrity.

M.R.I.

Magnetic resonance radiography utilises pulse shape, high frequency magnetic fields with high amplitude to excite nuclear spin. The pulses generated are normally in the frequency range of 1 - 100 MHz. The exciting frequency is equal to the precession frequency of the nuclear spin, resulting in nuclear magnetic resonance. After excitation, induced signals resulting from the nuclear spin are generated, detected and evaluated by a computer. The frequency of this induced signal corresponds to the precision frequency of the nuclear spin.

RF Interference Protection

RF shielding is required to protect the local environment from interference during the transmit phase that generates the "excitation pulse." During the receiving phase, i.e., the measurement of the "induced signals" resulting from the nuclear spin, it is necessary to prevent high frequency interference from the local environment from reaching the sensitive instrumentation. These interfering signals, or background radio frequency noise, are usually created by radio and TV stations, power equipment, motors, fluorescent lights, motor vehicles, household appliances, computers and other medical equipment.