| 摘要 |
<p>An open magnet (10) having a frustoconical shaped inner bore is provided for magnetic resonance imaging. The magnet (10) has a plurality of axisymmetric superconducting coils (24-28) of differing diameters which are disposed along an axis in order of successively increasing diameters so as to define the frustoconical shape. This shape permits a patient access opening which is larger than that in conventional cylindrical magnets. The overall length is much less than the length on conventional systems. The combination of wide opening and short length facilitates patient access and presents a feeling of openness. Furthermore, the device can be tilted with respect to the horizontal to increase the openness.</p> |
