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MR Safety and Compatibility Issues at High …
MR Safety and Compatibility Issues at high Magnetic FieldsGeoffrey D. Clarke, of RadiologyCurrent MRI Sales Trends Approximately 22,500 MRI systems (46% in US) in 2003 Estimated 7% growth from 2003-2006*(~ 24,000 systems)*IMV, Ltd. Des Plaines, IL20001800160014001200100080060040020002 000 2001 2002 2003 2004 2005 2006 TeslaFour Safety Concern Areas in MRI{Effects of Magnetic Fields on the PatientzStrong, static magnetic fieldszRadio frequency magnetic fieldszPulsed magnetic field gradients{Effects of Magnetic Fields on the Environment{ Safety Issues with MRI Contrast Agents{Quenching & Cryogen Boil-off GasesEffects of Magnetic FieldsEach of the magnetic fields used in MR imaging can be a source of Safety concerns:zStatic B0field: Physiological effects, projectile motion, medical device displacement and/or interference with normal operationzRadiofrequency B1field.}}}}
MR Safety and Compatibility Issues at High Magnetic Fields Geoffrey D. Clarke, Ph.D. clarkeg@uthscsa.edu Department of Radiology
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