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FOPE zones were identified on routine MRI ex-. aminations of the knee performed for acute or chron -. ic pain in 12 patients (seven girls and five boys; age. range, 11 years 9 monthsâ15 years 8 months); the MR. examinations were collected over 5 years (March. 2005âFebruary 2010). Patient history was obtained.
The most considerable safety concern in the MRI environment is the effect of the magnetic field on medical devices and implants. Just as some equipment is not transferrable from 1.5T to 3T, some medical devices that are safe at 1.5T are not safe at 3T.he Static magnetic field is a component of the MRI environment which is always present even when the scanner is not imaging. This static magnetic field is typically between .2 and 2Tesla (5,000 to 20,000 gauss) measured in the center of the magnet bore.