SHIM BOARD FOR MAGNETIC FIELD REGULATION, MAGNETIC FIELD REGULATING DEVICE, AND MAGNETIC FIELD REGULATING METHOD

摘要

PPROBLEM TO BE SOLVED: To provide a magnetic field generator for MRI and a magnetic field regulating method which suppresses dispersion by various parameters when regulating the high homogeneous magnetic field of a strong magnetic field dipole ring magnetic circuit, etc. , has higher accuracy, and is labor saving. PSOLUTION: The magnetic field regulating device for regulating a magnetic field which is generated in a void between opposed permanent magnets in a magnetic field generator equipped with a pair of sheet-like yokes which are opposedly spaced, permanent magnets provided on each of the opposing face sides of a pair of the sheet-like yokes, and a magnetic field regulating piece containing board which is provided on each of the opposing face sides of the permanent magnets and has the magnetic field regulating piece and an opening containing the magnetic field regulating piece, includes a shim board for magnetic field coordination, which has an opening of the same shap as the opening in the same position as the opening provided in the magnetic field regulating piece containing board and is equipped with a shim coil which is contained in the opening and is connectable with a direct current power source, and a magnetic field measuring means arranged in the void. PCOPYRIGHT: (C)2007,JPO&INPIT