Masaki Sekino1, Akihisa Miyazoe1, Hiroyuki Ohsaki1, Tatsuhiro Hisatsune1, Osamu Ozaki2, Tsukasa Kiyoshi3, Hitoshi Wada3
1The University of Tokyo, Kashiwa, Japan; 2Kobe Steel Ltd., Kobe, Japan; 3National Institute for Materials Science, Tsukuba, Japan
MRI requires a highly homogenous magnetic field zone which usually appears at the center of the MRI magnet coil. If this homogeneous zone is allowed to occur at an off-center position along the coil axis, the patient has a wide field of vision to carry out drawing or other interesting tasks for fMRI. In order to examine this idea, we fabricated a model magnet consisting of seven NbTi coils and generating a vertical magnetic field of 0.77 T; coil outer diameter is 307 mm, coil length 191 mm, designed field homogeneity 5 ppm @ 35mm DSV, and the location of homogeneous field zone 29.4 mm off-centered along the vertical coil axis.