Tanaka K, Yamada Y, Abe Z
Central Laboratory for Research and Education, Asahikawa Medical College, Japan.
Med Biol Eng Comput. 1992 Jul;30(4):427-32. doi: 10.1007/BF02446181.
The spatial localisation of NMR signals by the magnetic focusing method is examined and a method for electrical scanning of a spatially localised region is proposed. The small amount of signal from points of the star taper in static field focusing can almost be neglected, and the spatial localisation of the signal corresponds to the shape of a prolate spheroid in the centre region of the star-shaped focusing field. Electrical scanning of the focused region can be achieved at any position in the magnet system by superimposing linear field gradients on the focused field in the scanning direction. These are the inherent limitations of the static magnetic field focusing method. The embodiment of the scanning movement of the focused field is also confirmed.
研究了通过磁聚焦方法对核磁共振信号进行空间定位，并提出了一种对空间定位区域进行电扫描的方法。在静态场聚焦中，来自星型渐变点的少量信号几乎可以忽略不计，信号的空间定位对应于星形聚焦场中心区域的长椭球体形状。通过在扫描方向上的聚焦场上叠加线性场梯度，可以在磁体系统的任何位置实现对聚焦区域的电扫描。这些是静磁场聚焦方法的固有局限性。还证实了聚焦场扫描运动的具体实施方式。
