Magnetic resonance imaging apparatus

Abstract

Abstract PURPOSE:To constitute the title apparatus as an apparatus at every clinical subject and to reduce the wt. of the apparatus, by forming a specific spherical static magnetic field space to the gap between the opposed magnetic poles of a permanent magnet main body. CONSTITUTION:A permanent magnet main body 10 is constituted as a headphone-shaped magnet opened at the end parts thereof by providing magnetic poles 10a1, 10a2 using, for example, neodymium as a ferromagnetic material to two opposed leg end parts of an almost U-shape yoke 10b. Further, the length lg of the gap between the opposed magnetic poles 10a1, 10a2 is set to 20-30cm and a spherical static magnetic field space having an diameter of 10-20cm, whose magnetic field uniformity is set to 100ppm or less, is formed to said gap. A support mechanism 20 is constituted by providing a support apparatus 20b to an upright stand 20a and the support apparatus 20b pivotally supports the bridge part of the yoke 10b to allow the yoke 10b to perform erecting and falling motion A, revolving motion B and up-and-down motion C. By this constitution, the wt. of this magnetic resonance imaging apparatus becomes about 600kg.

Inventors

• 👤 Tadakimi Yoshida
• 👤 吉田　忠候

Bibliographic Details