The National Electrical Manufacturers Association has published four standards that are part of a series of test standards developed by the medical diagnostic imaging industry for the measurement of performance parameters, such as noise levels, energy deposition, and electric field strength, that govern image quality of MRI systems.
The National Electrical Manufacturers Association has published four standards that are part of a series of test standards developed by the medical diagnostic imaging industry for the measurement of performance parameters, such as noise levels, energy deposition, and electric field strength, that govern image quality of MRI systems.
These test standards - one revised and three new - are intended for use by equipment manufacturers, testing houses, prospective purchasers, and users alike. They can serve as reference procedures for acceptance testing and periodic quality assurance. Often, they form the basis for federal regulations.
"Research has demonstrated that localized heating is a limiting safety factor in MRI, and it is becoming increasingly important to characterize this local heating as MRI technology advances," said Michael Steckner of Hitachi Medical Systems and a member of the NEMA Magnetic Resonance Technical Committee. "This standard provides the tools to experimentally measure localized heating, complementing the MS 8 standard and thereby extending and enhancing our understanding of this important safety issue."
"As gradient system performance increases, there is also a need for experimental tools to quantify the gradient induced electric fields," Steckner said. "MS 11 provides the tools to experimentally measure these electric fields and complements the international MR safety standard, IEC 60601-2-33 (2002), which sets limits for patient safety and comfort."
Standards are available for purchase at the NEMA Web site.
For more information from the Diagnostic Imaging archives:
Experience overcomes difficulties of 3T MRI
MR safety at 3T: Bare metal and drug-eluting coronary stents
Agency reviews changes in teslas, channels, coils
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