Title :
3-D optimal shape design of ferromagnetic pole in MRI magnet of open permanent-magnet type
Author :
Kim, Dong-Hun ; Kim, Byung-Sung ; Lee, Joon-Ho ; Nah, Wan-Soo ; Park, Il-Han
Author_Institution :
Sch. of Electr. & Comput. Eng., Sung Kyun Kwan Univ., Suwon, South Korea
fDate :
3/1/2002 12:00:00 AM
Abstract :
This paper presents 3-D optimal shape design method of ferromagnetic pole pieces for magnetic resonance imaging (MRI) devices of open permanent magnet type. The design method is based on a continuum sensitivity analysis in conjunction with the boundary integral equation method (BIEM). The magnetic poles of an open magnet assembly are designed by the proposed method and the conventional shimming method. Magnetic field strength, ppm order homogeneity and working space volume are compared between the proposed method and conventional one.
Keywords :
biomedical MRI; biomedical equipment; boundary integral equations; permanent magnets; sensitivity analysis; 3-D optimal shape design; boundary integral equation method; continuum sensitivity analysis; ferromagnetic pole pieces; homogeneity; interface problem; magnetic field strength; magnetic resonance imaging devices; open permanent magnet type; shimming method; variational equation; working space volume; Assembly; Design methodology; Design optimization; Magnetic devices; Magnetic fields; Magnetic resonance imaging; Permanent magnets; Sensitivity analysis; Shape; Superconducting magnets;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2002.1018679
