title: Paramagnetic artifact and safety criteria for human brain mapping.
abstract: Biological effects of magnetic field and their safety criteria, especially effects of gradient magnetic field on the cerebral and pulmonary circulation during functional brain mapping are still unclear. Here we estimated that magnetically induced artifacts for the blood oxygenation level- and flow- based functional magnetic resonance imaging are less than 0.1%, and disturbance in the pulmonary circulation is less than 1.3% even if the field strength of magnetic resonance system is risen up to 10 tesla. These paramagnetic effects are considered to be small and harmless during human brain mapping.
authors.affiliation: Brain Information Group, Kansai Advanced Research Center, Communications Research Laboratory, 588-2 Iwaoka, Nishi-ku, Kobe, Hyogo 651-2492, Japan. aseiyama@phys1.med.osaka-u.ac.jp.
authors.forename: Akitoshi
authors.initials: A
authors.lastname: Seiyama
authors.forename: Junji
authors.initials: J
authors.lastname: Seki
authors.forename: Mari
authors.initials: M
authors.lastname: Iwamoto
authors.forename: Toshio
authors.initials: T
authors.lastname: Yanagida