Numerical Computation of Specific Absorption Rate and Induced Current for Workers Exposed to Static Magnetic Fields of MRI Scanners

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Date

2014

Journal Title

Journal ISSN

Volume Title

Type

Book chapter

Publisher

IEEE

Series Info

IEEE;Pages: 612-617

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Scientific Journal Rankings

Abstract

Currently-used Magnetic Resonance Imaging (MRI) scanners in Cairo City possess static magnetic field (SMF) that varies from 0.25 up to 3T. More than half of them possess SMF of 1.5T. Workers in MRI environments are exposed to static magnetic fields. This research paper presents a novel approach for numerical computation of induced current density and Specific Absorption Rate (SAR) values by estimation of fringe static magnetic fields. Iso-gauss line of MR was mapped and a polynomial function of the 7th degree was generated and tested. Induced current due to worker motion in the SMF and SAR values for organs and tissues have been calculated. Results illustrate that the computation tool used permits quick accurate MRI iso-gauss mapping and calculation of induced current and SAR values which can then be used for assessment of occupational exposure profile of MRI operators.

Description

Accession Number: WOS:000380466700118

Keywords

University of MRI Occupational exposure; MRI safety; induced current density; Specific Absorption Rate; Static magnetic fields, OCCUPATIONAL-EXPOSURE; GRADIENT

Citation

Cited References in Web of Science Core Collection: 13