| 摘要 |
A magnetic resonance imaging receiver/transmitter coil system (150) includes a first phased array (160) formed of a first plurality of electrically conductive members and defining an array volume and a second phased array (162) formed of a second plurality of electrically conductive members and disposed at least partially within the defined array volume. At least one of the first and second phased arrays is adapted to apply an RF magnetic field to the defined array volume. The first and second phased arrays are further adapted to receive MRI response signals. The first phased array is extendible to define a further array volume during transmission and is provided with a switch e.g. a diode switch (164), for electrically coupling and decoupling extension (156) to effectively extend the length of the first phased array and thereby define the further array volume. In this manner the length of the first phased array is effectively extended to approximately twice its unextended length.
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