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Motion-robust transmit radio frequency field mapping in magnetic resonance imaging using interleaved bloch-siegert shifting
Motion-robust transmit radio frequency field mapping in magnetic resonance imaging using interleaved bloch-siegert shifting
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机译:交织布洛赫-西格特频移在磁共振成像中的运动鲁棒发射射频场映射
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摘要
Systems and methods for mapping the transmit sensitivity of one or more radio frequency (“RF”) coils for use in magnetic resonance imaging (“MRI”) are described. The transmit RF field (“B1+”) for an RF coil, or an array of RF coils, is mapped using a robust, motion-insensitive technique that implements Bloch-Siegert shifts performed with interleaved positive and negative off-resonance shifts. The motion insensitivity of this technique makes it particularly useful for applications where there is significant motion, such as cardiac imaging, in which previous B1+ mapping techniques are not as accurate or effective.
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