The National Electrical Manufacturers Association (NEMA) has published three new MRI standards.
Produced by NEMA's Medical Imaging & Technology Alliance division, the standards include MS 6-2008, Determination of Signal-to-Noise Ratio (SNR) and Image Uniformity for Single-Channel Non-Volume Coils in Diagnostic MRI; MS 8-2008, Characterization of the Specific Absorption Rate (SAR) for MRI Systems; and MS 9-2008, Characterization of Phased Array Coils for Diagnostic MRIs.
MS 6-2008 defines a method for evaluating single-channel, nonvolume special-purpose radiofrequency coils for use with MRI, while MS 8-2008 describes calorimetric and pulse-energy methods for the determination of SARs in either a phantom or a patient, according to the Rosslyn, VA-based organization. MS 9-2008 describes a standard means for measuring and reporting SNR and uniformity of signal intensity in images acquired with phased-array coils, NEMA said.
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